frequencies, a "frequency table" with some functions might assist in
some work of the processor driver. Such a "frequency table" consists
of an array of struct cpufreq_frequency_table entries, with any value in
-"index" you want to use, and the corresponding frequency in
+"driver_data" you want to use, and the corresponding frequency in
"frequency". At the end of the table, you need to add a
cpufreq_frequency_table entry with frequency set to CPUFREQ_TABLE_END. And
if you want to skip one entry in the table, set the frequency to
is the corresponding frequency table helper for the ->target
stage. Just pass the values to this function, and the unsigned int
index returns the number of the frequency table entry which contains
-the frequency the CPU shall be set to. PLEASE NOTE: This is not the
-"index" which is in this cpufreq_table_entry.index, but instead
-cpufreq_table[index]. So, the new frequency is
-cpufreq_table[index].frequency, and the value you stored into the
-frequency table "index" field is
-cpufreq_table[index].index.
-
+the frequency the CPU shall be set to.
L: cpufreq@vger.kernel.org
L: linux-pm@vger.kernel.org
S: Maintained
-T: git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git
+T: git git://git.linaro.org/people/vireshk/linux.git (For ARM Updates)
F: drivers/cpufreq/
F: include/linux/cpufreq.h
bool "DA850/OMAP-L138/AM18x based system"
select ARCH_DAVINCI_DA8XX
select ARCH_HAS_CPUFREQ
+ select CPU_FREQ_TABLE
select CP_INTC
config ARCH_DAVINCI_DA8XX
#define OPP(freq) \
{ \
- .index = (unsigned int) &da850_opp_##freq, \
+ .driver_data = (unsigned int) &da850_opp_##freq, \
.frequency = freq * 1000, \
}
OPP(200),
OPP(96),
{
- .index = 0,
+ .driver_data = 0,
.frequency = CPUFREQ_TABLE_END,
},
};
if (!cvdd)
return -ENODEV;
- opp = (struct da850_opp *) cpufreq_info.freq_table[index].index;
+ opp = (struct da850_opp *) cpufreq_info.freq_table[index].driver_data;
return regulator_set_voltage(cvdd, opp->cvdd_min, opp->cvdd_max);
}
struct pll_data *pll = clk->pll_data;
int ret;
- opp = (struct da850_opp *) cpufreq_info.freq_table[index].index;
+ opp = (struct da850_opp *) cpufreq_info.freq_table[index].driver_data;
prediv = opp->prediv;
mult = opp->mult;
postdiv = opp->postdiv;
config PXA25x
bool
select CPU_XSCALE
+ select CPU_FREQ_TABLE if CPU_FREQ
help
Select code specific to PXA21x/25x/26x variants
config PXA27x
bool
select CPU_XSCALE
+ select CPU_FREQ_TABLE if CPU_FREQ
help
Select code specific to PXA27x variants
config PXA3xx
bool
select CPU_XSC3
+ select CPU_FREQ_TABLE if CPU_FREQ
help
Select code specific to PXA3xx variants
*/
void s3c2410_set_fvco(struct s3c_cpufreq_config *cfg)
{
- __raw_writel(cfg->pll.index, S3C2410_MPLLCON);
+ __raw_writel(cfg->pll.driver_data, S3C2410_MPLLCON);
}
cfg->freq.pclk = pclk = clk_get_rate(clk_pclk);
cfg->freq.armclk = armclk = clk_get_rate(clk_arm);
- cfg->pll.index = __raw_readl(S3C2410_MPLLCON);
+ cfg->pll.driver_data = __raw_readl(S3C2410_MPLLCON);
cfg->pll.frequency = fclk;
cfg->freq.hclk_tns = 1000000000 / (cfg->freq.hclk / 10);
static int s3c_cpufreq_suspend(struct cpufreq_policy *policy)
{
suspend_pll.frequency = clk_get_rate(_clk_mpll);
- suspend_pll.index = __raw_readl(S3C2410_MPLLCON);
+ suspend_pll.driver_data = __raw_readl(S3C2410_MPLLCON);
suspend_freq = s3c_cpufreq_get(0) * 1000;
return 0;
#include <plat/cpu-freq-core.h>
static struct cpufreq_frequency_table pll_vals_12MHz[] = {
- { .frequency = 34000000, .index = PLLVAL(82, 2, 3), },
- { .frequency = 45000000, .index = PLLVAL(82, 1, 3), },
- { .frequency = 51000000, .index = PLLVAL(161, 3, 3), },
- { .frequency = 48000000, .index = PLLVAL(120, 2, 3), },
- { .frequency = 56000000, .index = PLLVAL(142, 2, 3), },
- { .frequency = 68000000, .index = PLLVAL(82, 2, 2), },
- { .frequency = 79000000, .index = PLLVAL(71, 1, 2), },
- { .frequency = 85000000, .index = PLLVAL(105, 2, 2), },
- { .frequency = 90000000, .index = PLLVAL(112, 2, 2), },
- { .frequency = 101000000, .index = PLLVAL(127, 2, 2), },
- { .frequency = 113000000, .index = PLLVAL(105, 1, 2), },
- { .frequency = 118000000, .index = PLLVAL(150, 2, 2), },
- { .frequency = 124000000, .index = PLLVAL(116, 1, 2), },
- { .frequency = 135000000, .index = PLLVAL(82, 2, 1), },
- { .frequency = 147000000, .index = PLLVAL(90, 2, 1), },
- { .frequency = 152000000, .index = PLLVAL(68, 1, 1), },
- { .frequency = 158000000, .index = PLLVAL(71, 1, 1), },
- { .frequency = 170000000, .index = PLLVAL(77, 1, 1), },
- { .frequency = 180000000, .index = PLLVAL(82, 1, 1), },
- { .frequency = 186000000, .index = PLLVAL(85, 1, 1), },
- { .frequency = 192000000, .index = PLLVAL(88, 1, 1), },
- { .frequency = 203000000, .index = PLLVAL(161, 3, 1), },
+ { .frequency = 34000000, .driver_data = PLLVAL(82, 2, 3), },
+ { .frequency = 45000000, .driver_data = PLLVAL(82, 1, 3), },
+ { .frequency = 51000000, .driver_data = PLLVAL(161, 3, 3), },
+ { .frequency = 48000000, .driver_data = PLLVAL(120, 2, 3), },
+ { .frequency = 56000000, .driver_data = PLLVAL(142, 2, 3), },
+ { .frequency = 68000000, .driver_data = PLLVAL(82, 2, 2), },
+ { .frequency = 79000000, .driver_data = PLLVAL(71, 1, 2), },
+ { .frequency = 85000000, .driver_data = PLLVAL(105, 2, 2), },
+ { .frequency = 90000000, .driver_data = PLLVAL(112, 2, 2), },
+ { .frequency = 101000000, .driver_data = PLLVAL(127, 2, 2), },
+ { .frequency = 113000000, .driver_data = PLLVAL(105, 1, 2), },
+ { .frequency = 118000000, .driver_data = PLLVAL(150, 2, 2), },
+ { .frequency = 124000000, .driver_data = PLLVAL(116, 1, 2), },
+ { .frequency = 135000000, .driver_data = PLLVAL(82, 2, 1), },
+ { .frequency = 147000000, .driver_data = PLLVAL(90, 2, 1), },
+ { .frequency = 152000000, .driver_data = PLLVAL(68, 1, 1), },
+ { .frequency = 158000000, .driver_data = PLLVAL(71, 1, 1), },
+ { .frequency = 170000000, .driver_data = PLLVAL(77, 1, 1), },
+ { .frequency = 180000000, .driver_data = PLLVAL(82, 1, 1), },
+ { .frequency = 186000000, .driver_data = PLLVAL(85, 1, 1), },
+ { .frequency = 192000000, .driver_data = PLLVAL(88, 1, 1), },
+ { .frequency = 203000000, .driver_data = PLLVAL(161, 3, 1), },
/* 2410A extras */
- { .frequency = 210000000, .index = PLLVAL(132, 2, 1), },
- { .frequency = 226000000, .index = PLLVAL(105, 1, 1), },
- { .frequency = 266000000, .index = PLLVAL(125, 1, 1), },
- { .frequency = 268000000, .index = PLLVAL(126, 1, 1), },
- { .frequency = 270000000, .index = PLLVAL(127, 1, 1), },
+ { .frequency = 210000000, .driver_data = PLLVAL(132, 2, 1), },
+ { .frequency = 226000000, .driver_data = PLLVAL(105, 1, 1), },
+ { .frequency = 266000000, .driver_data = PLLVAL(125, 1, 1), },
+ { .frequency = 268000000, .driver_data = PLLVAL(126, 1, 1), },
+ { .frequency = 270000000, .driver_data = PLLVAL(127, 1, 1), },
};
static int s3c2410_plls_add(struct device *dev, struct subsys_interface *sif)
#include <plat/cpu-freq-core.h>
static struct cpufreq_frequency_table s3c2440_plls_12[] __initdata = {
- { .frequency = 75000000, .index = PLLVAL(0x75, 3, 3), }, /* FVco 600.000000 */
- { .frequency = 80000000, .index = PLLVAL(0x98, 4, 3), }, /* FVco 640.000000 */
- { .frequency = 90000000, .index = PLLVAL(0x70, 2, 3), }, /* FVco 720.000000 */
- { .frequency = 100000000, .index = PLLVAL(0x5c, 1, 3), }, /* FVco 800.000000 */
- { .frequency = 110000000, .index = PLLVAL(0x66, 1, 3), }, /* FVco 880.000000 */
- { .frequency = 120000000, .index = PLLVAL(0x70, 1, 3), }, /* FVco 960.000000 */
- { .frequency = 150000000, .index = PLLVAL(0x75, 3, 2), }, /* FVco 600.000000 */
- { .frequency = 160000000, .index = PLLVAL(0x98, 4, 2), }, /* FVco 640.000000 */
- { .frequency = 170000000, .index = PLLVAL(0x4d, 1, 2), }, /* FVco 680.000000 */
- { .frequency = 180000000, .index = PLLVAL(0x70, 2, 2), }, /* FVco 720.000000 */
- { .frequency = 190000000, .index = PLLVAL(0x57, 1, 2), }, /* FVco 760.000000 */
- { .frequency = 200000000, .index = PLLVAL(0x5c, 1, 2), }, /* FVco 800.000000 */
- { .frequency = 210000000, .index = PLLVAL(0x84, 2, 2), }, /* FVco 840.000000 */
- { .frequency = 220000000, .index = PLLVAL(0x66, 1, 2), }, /* FVco 880.000000 */
- { .frequency = 230000000, .index = PLLVAL(0x6b, 1, 2), }, /* FVco 920.000000 */
- { .frequency = 240000000, .index = PLLVAL(0x70, 1, 2), }, /* FVco 960.000000 */
- { .frequency = 300000000, .index = PLLVAL(0x75, 3, 1), }, /* FVco 600.000000 */
- { .frequency = 310000000, .index = PLLVAL(0x93, 4, 1), }, /* FVco 620.000000 */
- { .frequency = 320000000, .index = PLLVAL(0x98, 4, 1), }, /* FVco 640.000000 */
- { .frequency = 330000000, .index = PLLVAL(0x66, 2, 1), }, /* FVco 660.000000 */
- { .frequency = 340000000, .index = PLLVAL(0x4d, 1, 1), }, /* FVco 680.000000 */
- { .frequency = 350000000, .index = PLLVAL(0xa7, 4, 1), }, /* FVco 700.000000 */
- { .frequency = 360000000, .index = PLLVAL(0x70, 2, 1), }, /* FVco 720.000000 */
- { .frequency = 370000000, .index = PLLVAL(0xb1, 4, 1), }, /* FVco 740.000000 */
- { .frequency = 380000000, .index = PLLVAL(0x57, 1, 1), }, /* FVco 760.000000 */
- { .frequency = 390000000, .index = PLLVAL(0x7a, 2, 1), }, /* FVco 780.000000 */
- { .frequency = 400000000, .index = PLLVAL(0x5c, 1, 1), }, /* FVco 800.000000 */
+ { .frequency = 75000000, .driver_data = PLLVAL(0x75, 3, 3), }, /* FVco 600.000000 */
+ { .frequency = 80000000, .driver_data = PLLVAL(0x98, 4, 3), }, /* FVco 640.000000 */
+ { .frequency = 90000000, .driver_data = PLLVAL(0x70, 2, 3), }, /* FVco 720.000000 */
+ { .frequency = 100000000, .driver_data = PLLVAL(0x5c, 1, 3), }, /* FVco 800.000000 */
+ { .frequency = 110000000, .driver_data = PLLVAL(0x66, 1, 3), }, /* FVco 880.000000 */
+ { .frequency = 120000000, .driver_data = PLLVAL(0x70, 1, 3), }, /* FVco 960.000000 */
+ { .frequency = 150000000, .driver_data = PLLVAL(0x75, 3, 2), }, /* FVco 600.000000 */
+ { .frequency = 160000000, .driver_data = PLLVAL(0x98, 4, 2), }, /* FVco 640.000000 */
+ { .frequency = 170000000, .driver_data = PLLVAL(0x4d, 1, 2), }, /* FVco 680.000000 */
+ { .frequency = 180000000, .driver_data = PLLVAL(0x70, 2, 2), }, /* FVco 720.000000 */
+ { .frequency = 190000000, .driver_data = PLLVAL(0x57, 1, 2), }, /* FVco 760.000000 */
+ { .frequency = 200000000, .driver_data = PLLVAL(0x5c, 1, 2), }, /* FVco 800.000000 */
+ { .frequency = 210000000, .driver_data = PLLVAL(0x84, 2, 2), }, /* FVco 840.000000 */
+ { .frequency = 220000000, .driver_data = PLLVAL(0x66, 1, 2), }, /* FVco 880.000000 */
+ { .frequency = 230000000, .driver_data = PLLVAL(0x6b, 1, 2), }, /* FVco 920.000000 */
+ { .frequency = 240000000, .driver_data = PLLVAL(0x70, 1, 2), }, /* FVco 960.000000 */
+ { .frequency = 300000000, .driver_data = PLLVAL(0x75, 3, 1), }, /* FVco 600.000000 */
+ { .frequency = 310000000, .driver_data = PLLVAL(0x93, 4, 1), }, /* FVco 620.000000 */
+ { .frequency = 320000000, .driver_data = PLLVAL(0x98, 4, 1), }, /* FVco 640.000000 */
+ { .frequency = 330000000, .driver_data = PLLVAL(0x66, 2, 1), }, /* FVco 660.000000 */
+ { .frequency = 340000000, .driver_data = PLLVAL(0x4d, 1, 1), }, /* FVco 680.000000 */
+ { .frequency = 350000000, .driver_data = PLLVAL(0xa7, 4, 1), }, /* FVco 700.000000 */
+ { .frequency = 360000000, .driver_data = PLLVAL(0x70, 2, 1), }, /* FVco 720.000000 */
+ { .frequency = 370000000, .driver_data = PLLVAL(0xb1, 4, 1), }, /* FVco 740.000000 */
+ { .frequency = 380000000, .driver_data = PLLVAL(0x57, 1, 1), }, /* FVco 760.000000 */
+ { .frequency = 390000000, .driver_data = PLLVAL(0x7a, 2, 1), }, /* FVco 780.000000 */
+ { .frequency = 400000000, .driver_data = PLLVAL(0x5c, 1, 1), }, /* FVco 800.000000 */
};
static int s3c2440_plls12_add(struct device *dev, struct subsys_interface *sif)
#include <plat/cpu-freq-core.h>
static struct cpufreq_frequency_table s3c2440_plls_169344[] __initdata = {
- { .frequency = 78019200, .index = PLLVAL(121, 5, 3), }, /* FVco 624.153600 */
- { .frequency = 84067200, .index = PLLVAL(131, 5, 3), }, /* FVco 672.537600 */
- { .frequency = 90115200, .index = PLLVAL(141, 5, 3), }, /* FVco 720.921600 */
- { .frequency = 96163200, .index = PLLVAL(151, 5, 3), }, /* FVco 769.305600 */
- { .frequency = 102135600, .index = PLLVAL(185, 6, 3), }, /* FVco 817.084800 */
- { .frequency = 108259200, .index = PLLVAL(171, 5, 3), }, /* FVco 866.073600 */
- { .frequency = 114307200, .index = PLLVAL(127, 3, 3), }, /* FVco 914.457600 */
- { .frequency = 120234240, .index = PLLVAL(134, 3, 3), }, /* FVco 961.873920 */
- { .frequency = 126161280, .index = PLLVAL(141, 3, 3), }, /* FVco 1009.290240 */
- { .frequency = 132088320, .index = PLLVAL(148, 3, 3), }, /* FVco 1056.706560 */
- { .frequency = 138015360, .index = PLLVAL(155, 3, 3), }, /* FVco 1104.122880 */
- { .frequency = 144789120, .index = PLLVAL(163, 3, 3), }, /* FVco 1158.312960 */
- { .frequency = 150100363, .index = PLLVAL(187, 9, 2), }, /* FVco 600.401454 */
- { .frequency = 156038400, .index = PLLVAL(121, 5, 2), }, /* FVco 624.153600 */
- { .frequency = 162086400, .index = PLLVAL(126, 5, 2), }, /* FVco 648.345600 */
- { .frequency = 168134400, .index = PLLVAL(131, 5, 2), }, /* FVco 672.537600 */
- { .frequency = 174048000, .index = PLLVAL(177, 7, 2), }, /* FVco 696.192000 */
- { .frequency = 180230400, .index = PLLVAL(141, 5, 2), }, /* FVco 720.921600 */
- { .frequency = 186278400, .index = PLLVAL(124, 4, 2), }, /* FVco 745.113600 */
- { .frequency = 192326400, .index = PLLVAL(151, 5, 2), }, /* FVco 769.305600 */
- { .frequency = 198132480, .index = PLLVAL(109, 3, 2), }, /* FVco 792.529920 */
- { .frequency = 204271200, .index = PLLVAL(185, 6, 2), }, /* FVco 817.084800 */
- { .frequency = 210268800, .index = PLLVAL(141, 4, 2), }, /* FVco 841.075200 */
- { .frequency = 216518400, .index = PLLVAL(171, 5, 2), }, /* FVco 866.073600 */
- { .frequency = 222264000, .index = PLLVAL(97, 2, 2), }, /* FVco 889.056000 */
- { .frequency = 228614400, .index = PLLVAL(127, 3, 2), }, /* FVco 914.457600 */
- { .frequency = 234259200, .index = PLLVAL(158, 4, 2), }, /* FVco 937.036800 */
- { .frequency = 240468480, .index = PLLVAL(134, 3, 2), }, /* FVco 961.873920 */
- { .frequency = 246960000, .index = PLLVAL(167, 4, 2), }, /* FVco 987.840000 */
- { .frequency = 252322560, .index = PLLVAL(141, 3, 2), }, /* FVco 1009.290240 */
- { .frequency = 258249600, .index = PLLVAL(114, 2, 2), }, /* FVco 1032.998400 */
- { .frequency = 264176640, .index = PLLVAL(148, 3, 2), }, /* FVco 1056.706560 */
- { .frequency = 270950400, .index = PLLVAL(120, 2, 2), }, /* FVco 1083.801600 */
- { .frequency = 276030720, .index = PLLVAL(155, 3, 2), }, /* FVco 1104.122880 */
- { .frequency = 282240000, .index = PLLVAL(92, 1, 2), }, /* FVco 1128.960000 */
- { .frequency = 289578240, .index = PLLVAL(163, 3, 2), }, /* FVco 1158.312960 */
- { .frequency = 294235200, .index = PLLVAL(131, 2, 2), }, /* FVco 1176.940800 */
- { .frequency = 300200727, .index = PLLVAL(187, 9, 1), }, /* FVco 600.401454 */
- { .frequency = 306358690, .index = PLLVAL(191, 9, 1), }, /* FVco 612.717380 */
- { .frequency = 312076800, .index = PLLVAL(121, 5, 1), }, /* FVco 624.153600 */
- { .frequency = 318366720, .index = PLLVAL(86, 3, 1), }, /* FVco 636.733440 */
- { .frequency = 324172800, .index = PLLVAL(126, 5, 1), }, /* FVco 648.345600 */
- { .frequency = 330220800, .index = PLLVAL(109, 4, 1), }, /* FVco 660.441600 */
- { .frequency = 336268800, .index = PLLVAL(131, 5, 1), }, /* FVco 672.537600 */
- { .frequency = 342074880, .index = PLLVAL(93, 3, 1), }, /* FVco 684.149760 */
- { .frequency = 348096000, .index = PLLVAL(177, 7, 1), }, /* FVco 696.192000 */
- { .frequency = 355622400, .index = PLLVAL(118, 4, 1), }, /* FVco 711.244800 */
- { .frequency = 360460800, .index = PLLVAL(141, 5, 1), }, /* FVco 720.921600 */
- { .frequency = 366206400, .index = PLLVAL(165, 6, 1), }, /* FVco 732.412800 */
- { .frequency = 372556800, .index = PLLVAL(124, 4, 1), }, /* FVco 745.113600 */
- { .frequency = 378201600, .index = PLLVAL(126, 4, 1), }, /* FVco 756.403200 */
- { .frequency = 384652800, .index = PLLVAL(151, 5, 1), }, /* FVco 769.305600 */
- { .frequency = 391608000, .index = PLLVAL(177, 6, 1), }, /* FVco 783.216000 */
- { .frequency = 396264960, .index = PLLVAL(109, 3, 1), }, /* FVco 792.529920 */
- { .frequency = 402192000, .index = PLLVAL(87, 2, 1), }, /* FVco 804.384000 */
+ { .frequency = 78019200, .driver_data = PLLVAL(121, 5, 3), }, /* FVco 624.153600 */
+ { .frequency = 84067200, .driver_data = PLLVAL(131, 5, 3), }, /* FVco 672.537600 */
+ { .frequency = 90115200, .driver_data = PLLVAL(141, 5, 3), }, /* FVco 720.921600 */
+ { .frequency = 96163200, .driver_data = PLLVAL(151, 5, 3), }, /* FVco 769.305600 */
+ { .frequency = 102135600, .driver_data = PLLVAL(185, 6, 3), }, /* FVco 817.084800 */
+ { .frequency = 108259200, .driver_data = PLLVAL(171, 5, 3), }, /* FVco 866.073600 */
+ { .frequency = 114307200, .driver_data = PLLVAL(127, 3, 3), }, /* FVco 914.457600 */
+ { .frequency = 120234240, .driver_data = PLLVAL(134, 3, 3), }, /* FVco 961.873920 */
+ { .frequency = 126161280, .driver_data = PLLVAL(141, 3, 3), }, /* FVco 1009.290240 */
+ { .frequency = 132088320, .driver_data = PLLVAL(148, 3, 3), }, /* FVco 1056.706560 */
+ { .frequency = 138015360, .driver_data = PLLVAL(155, 3, 3), }, /* FVco 1104.122880 */
+ { .frequency = 144789120, .driver_data = PLLVAL(163, 3, 3), }, /* FVco 1158.312960 */
+ { .frequency = 150100363, .driver_data = PLLVAL(187, 9, 2), }, /* FVco 600.401454 */
+ { .frequency = 156038400, .driver_data = PLLVAL(121, 5, 2), }, /* FVco 624.153600 */
+ { .frequency = 162086400, .driver_data = PLLVAL(126, 5, 2), }, /* FVco 648.345600 */
+ { .frequency = 168134400, .driver_data = PLLVAL(131, 5, 2), }, /* FVco 672.537600 */
+ { .frequency = 174048000, .driver_data = PLLVAL(177, 7, 2), }, /* FVco 696.192000 */
+ { .frequency = 180230400, .driver_data = PLLVAL(141, 5, 2), }, /* FVco 720.921600 */
+ { .frequency = 186278400, .driver_data = PLLVAL(124, 4, 2), }, /* FVco 745.113600 */
+ { .frequency = 192326400, .driver_data = PLLVAL(151, 5, 2), }, /* FVco 769.305600 */
+ { .frequency = 198132480, .driver_data = PLLVAL(109, 3, 2), }, /* FVco 792.529920 */
+ { .frequency = 204271200, .driver_data = PLLVAL(185, 6, 2), }, /* FVco 817.084800 */
+ { .frequency = 210268800, .driver_data = PLLVAL(141, 4, 2), }, /* FVco 841.075200 */
+ { .frequency = 216518400, .driver_data = PLLVAL(171, 5, 2), }, /* FVco 866.073600 */
+ { .frequency = 222264000, .driver_data = PLLVAL(97, 2, 2), }, /* FVco 889.056000 */
+ { .frequency = 228614400, .driver_data = PLLVAL(127, 3, 2), }, /* FVco 914.457600 */
+ { .frequency = 234259200, .driver_data = PLLVAL(158, 4, 2), }, /* FVco 937.036800 */
+ { .frequency = 240468480, .driver_data = PLLVAL(134, 3, 2), }, /* FVco 961.873920 */
+ { .frequency = 246960000, .driver_data = PLLVAL(167, 4, 2), }, /* FVco 987.840000 */
+ { .frequency = 252322560, .driver_data = PLLVAL(141, 3, 2), }, /* FVco 1009.290240 */
+ { .frequency = 258249600, .driver_data = PLLVAL(114, 2, 2), }, /* FVco 1032.998400 */
+ { .frequency = 264176640, .driver_data = PLLVAL(148, 3, 2), }, /* FVco 1056.706560 */
+ { .frequency = 270950400, .driver_data = PLLVAL(120, 2, 2), }, /* FVco 1083.801600 */
+ { .frequency = 276030720, .driver_data = PLLVAL(155, 3, 2), }, /* FVco 1104.122880 */
+ { .frequency = 282240000, .driver_data = PLLVAL(92, 1, 2), }, /* FVco 1128.960000 */
+ { .frequency = 289578240, .driver_data = PLLVAL(163, 3, 2), }, /* FVco 1158.312960 */
+ { .frequency = 294235200, .driver_data = PLLVAL(131, 2, 2), }, /* FVco 1176.940800 */
+ { .frequency = 300200727, .driver_data = PLLVAL(187, 9, 1), }, /* FVco 600.401454 */
+ { .frequency = 306358690, .driver_data = PLLVAL(191, 9, 1), }, /* FVco 612.717380 */
+ { .frequency = 312076800, .driver_data = PLLVAL(121, 5, 1), }, /* FVco 624.153600 */
+ { .frequency = 318366720, .driver_data = PLLVAL(86, 3, 1), }, /* FVco 636.733440 */
+ { .frequency = 324172800, .driver_data = PLLVAL(126, 5, 1), }, /* FVco 648.345600 */
+ { .frequency = 330220800, .driver_data = PLLVAL(109, 4, 1), }, /* FVco 660.441600 */
+ { .frequency = 336268800, .driver_data = PLLVAL(131, 5, 1), }, /* FVco 672.537600 */
+ { .frequency = 342074880, .driver_data = PLLVAL(93, 3, 1), }, /* FVco 684.149760 */
+ { .frequency = 348096000, .driver_data = PLLVAL(177, 7, 1), }, /* FVco 696.192000 */
+ { .frequency = 355622400, .driver_data = PLLVAL(118, 4, 1), }, /* FVco 711.244800 */
+ { .frequency = 360460800, .driver_data = PLLVAL(141, 5, 1), }, /* FVco 720.921600 */
+ { .frequency = 366206400, .driver_data = PLLVAL(165, 6, 1), }, /* FVco 732.412800 */
+ { .frequency = 372556800, .driver_data = PLLVAL(124, 4, 1), }, /* FVco 745.113600 */
+ { .frequency = 378201600, .driver_data = PLLVAL(126, 4, 1), }, /* FVco 756.403200 */
+ { .frequency = 384652800, .driver_data = PLLVAL(151, 5, 1), }, /* FVco 769.305600 */
+ { .frequency = 391608000, .driver_data = PLLVAL(177, 6, 1), }, /* FVco 783.216000 */
+ { .frequency = 396264960, .driver_data = PLLVAL(109, 3, 1), }, /* FVco 792.529920 */
+ { .frequency = 402192000, .driver_data = PLLVAL(87, 2, 1), }, /* FVco 804.384000 */
};
static int s3c2440_plls169344_add(struct device *dev,
/* Initialise PLLC2 frequency table */
for (i = 0; i < ARRAY_SIZE(pllc2_freq_table) - 2; i++) {
pllc2_freq_table[i].frequency = clk->parent->rate * (i + 20) * 2;
- pllc2_freq_table[i].index = i;
+ pllc2_freq_table[i].driver_data = i;
}
/* This is a special entry - switching PLL off makes it a repeater */
pllc2_freq_table[i].frequency = clk->parent->rate;
- pllc2_freq_table[i].index = i;
+ pllc2_freq_table[i].driver_data = i;
pllc2_freq_table[++i].frequency = CPUFREQ_TABLE_END;
- pllc2_freq_table[i].index = i;
+ pllc2_freq_table[i].driver_data = i;
}
static unsigned long pllc2_recalc(struct clk *clk)
select ARM_ERRATA_754327 if SMP
select ARM_ERRATA_764369 if SMP
select ARM_GIC
- select CPU_FREQ_TABLE if CPU_FREQ
select CPU_V7
select PINCTRL
select PINCTRL_TEGRA20
select ARM_ERRATA_754322
select ARM_ERRATA_764369 if SMP
select ARM_GIC
- select CPU_FREQ_TABLE if CPU_FREQ
select CPU_V7
select PINCTRL
select PINCTRL_TEGRA30
select ARM_ARCH_TIMER
select ARM_GIC
select ARM_L1_CACHE_SHIFT_6
- select CPU_FREQ_TABLE if CPU_FREQ
select CPU_V7
select PINCTRL
select PINCTRL_TEGRA114
s3c_freq_dbg("%s: { %d = %u kHz }\n",
__func__, index, freq);
- table[index].index = index;
+ table[index].driver_data = index;
table[index].frequency = freq;
}
config ETRAXFS
bool "ETRAX-FS-V32"
+ select CPU_FREQ_TABLE if CPU_FREQ
help
Support CRIS V32.
config CRIS_MACH_ARTPEC3
bool "ARTPEC-3"
+ select CPU_FREQ_TABLE if CPU_FREQ
help
Support Axis ARTPEC-3.
clk->rate = rate;
regval = LOONGSON_CHIPCFG0;
- regval = (regval & ~0x7) | (loongson2_clockmod_table[i].index - 1);
+ regval = (regval & ~0x7) |
+ (loongson2_clockmod_table[i].driver_data - 1);
LOONGSON_CHIPCFG0 = regval;
return ret;
source "drivers/cpufreq/Kconfig"
-menu "CPU Frequency drivers"
- depends on CPU_FREQ
-
-config CPU_FREQ_PMAC
- bool "Support for Apple PowerBooks"
- depends on ADB_PMU && PPC32
- select CPU_FREQ_TABLE
- help
- This adds support for frequency switching on Apple PowerBooks,
- this currently includes some models of iBook & Titanium
- PowerBook.
-
-config CPU_FREQ_PMAC64
- bool "Support for some Apple G5s"
- depends on PPC_PMAC && PPC64
- select CPU_FREQ_TABLE
- help
- This adds support for frequency switching on Apple iMac G5,
- and some of the more recent desktop G5 machines as well.
-
-config PPC_PASEMI_CPUFREQ
- bool "Support for PA Semi PWRficient"
- depends on PPC_PASEMI
- default y
- select CPU_FREQ_TABLE
- help
- This adds the support for frequency switching on PA Semi
- PWRficient processors.
-
-endmenu
-
menu "CPUIdle driver"
source "drivers/cpuidle/Kconfig"
obj-y += setup.o pci.o time.o idle.o powersave.o iommu.o dma_lib.o misc.o
obj-$(CONFIG_PPC_PASEMI_MDIO) += gpio_mdio.o
-obj-$(CONFIG_PPC_PASEMI_CPUFREQ) += cpufreq.o
sleep.o low_i2c.o cache.o pfunc_core.o \
pfunc_base.o udbg_scc.o udbg_adb.o
obj-$(CONFIG_PMAC_BACKLIGHT) += backlight.o
-obj-$(CONFIG_CPU_FREQ_PMAC) += cpufreq_32.o
-obj-$(CONFIG_CPU_FREQ_PMAC64) += cpufreq_64.o
# CONFIG_NVRAM is an arch. independent tristate symbol, for pmac32 we really
# need this to be a bool. Cheat here and pretend CONFIG_NVRAM=m is really
# CONFIG_NVRAM=y
list_for_each_entry(opp, &dev_opp->opp_list, node) {
if (opp->available) {
- freq_table[i].index = i;
+ freq_table[i].driver_data = i;
freq_table[i].frequency = opp->rate / 1000;
i++;
}
}
mutex_unlock(&dev_opp_list_lock);
- freq_table[i].index = i;
+ freq_table[i].driver_data = i;
freq_table[i].frequency = CPUFREQ_TABLE_END;
*table = &freq_table[0];
config ARM_BIG_LITTLE_CPUFREQ
tristate "Generic ARM big LITTLE CPUfreq driver"
depends on ARM_CPU_TOPOLOGY && PM_OPP && HAVE_CLK
+ select CPU_FREQ_TABLE
help
This enables the Generic CPUfreq driver for ARM big.LITTLE platforms.
config ARM_EXYNOS_CPUFREQ
bool "SAMSUNG EXYNOS SoCs"
depends on ARCH_EXYNOS
+ select CPU_FREQ_TABLE
default y
help
This adds the CPUFreq driver common part for Samsung
config ARM_EXYNOS5440_CPUFREQ
def_bool SOC_EXYNOS5440
depends on HAVE_CLK && PM_OPP && OF
+ select CPU_FREQ_TABLE
help
This adds the CPUFreq driver for Samsung EXYNOS5440
SoC. The nature of exynos5440 clock controller is
config ARM_HIGHBANK_CPUFREQ
tristate "Calxeda Highbank-based"
depends on ARCH_HIGHBANK
- select CPU_FREQ_TABLE
select GENERIC_CPUFREQ_CPU0
select PM_OPP
select REGULATOR
tristate "Freescale i.MX6Q cpufreq support"
depends on SOC_IMX6Q
depends on REGULATOR_ANATOP
+ select CPU_FREQ_TABLE
help
This adds cpufreq driver support for Freescale i.MX6Q SOC.
config ARM_KIRKWOOD_CPUFREQ
def_bool ARCH_KIRKWOOD && OF
+ select CPU_FREQ_TABLE
help
This adds the CPUFreq driver for Marvell Kirkwood
SoCs.
config ARM_S3C2416_CPUFREQ
bool "S3C2416 CPU Frequency scaling support"
depends on CPU_S3C2416
+ select CPU_FREQ_TABLE
help
This adds the CPUFreq driver for the Samsung S3C2416 and
S3C2450 SoC. The S3C2416 supports changing the rate of the
config ARM_S3C64XX_CPUFREQ
bool "Samsung S3C64XX"
depends on CPU_S3C6410
+ select CPU_FREQ_TABLE
default y
help
This adds the CPUFreq driver for Samsung S3C6410 SoC.
config ARM_SPEAR_CPUFREQ
bool "SPEAr CPUFreq support"
depends on PLAT_SPEAR
+ select CPU_FREQ_TABLE
default y
help
This adds the CPUFreq driver support for SPEAr SOCs.
+
+config ARM_TEGRA_CPUFREQ
+ bool "TEGRA CPUFreq support"
+ depends on ARCH_TEGRA
+ select CPU_FREQ_TABLE
+ default y
+ help
+ This adds the CPUFreq driver support for TEGRA SOCs.
config CPU_FREQ_CBE
tristate "CBE frequency scaling"
depends on CBE_RAS && PPC_CELL
+ select CPU_FREQ_TABLE
default m
help
This adds the cpufreq driver for Cell BE processors.
help
This adds support for frequency switching on Maple 970FX
Evaluation Board and compatible boards (IBM JS2x blades).
+
+config PPC_CORENET_CPUFREQ
+ tristate "CPU frequency scaling driver for Freescale E500MC SoCs"
+ depends on PPC_E500MC && OF && COMMON_CLK
+ select CPU_FREQ_TABLE
+ select CLK_PPC_CORENET
+ help
+ This adds the CPUFreq driver support for Freescale e500mc,
+ e5500 and e6500 series SoCs which are capable of changing
+ the CPU's frequency dynamically.
+
+config CPU_FREQ_PMAC
+ bool "Support for Apple PowerBooks"
+ depends on ADB_PMU && PPC32
+ select CPU_FREQ_TABLE
+ help
+ This adds support for frequency switching on Apple PowerBooks,
+ this currently includes some models of iBook & Titanium
+ PowerBook.
+
+config CPU_FREQ_PMAC64
+ bool "Support for some Apple G5s"
+ depends on PPC_PMAC && PPC64
+ select CPU_FREQ_TABLE
+ help
+ This adds support for frequency switching on Apple iMac G5,
+ and some of the more recent desktop G5 machines as well.
+
+config PPC_PASEMI_CPUFREQ
+ bool "Support for PA Semi PWRficient"
+ depends on PPC_PASEMI
+ select CPU_FREQ_TABLE
+ default y
+ help
+ This adds the support for frequency switching on PA Semi
+ PWRficient processors.
config X86_AMD_FREQ_SENSITIVITY
tristate "AMD frequency sensitivity feedback powersave bias"
depends on CPU_FREQ_GOV_ONDEMAND && X86_ACPI_CPUFREQ && CPU_SUP_AMD
+ select CPU_FREQ_TABLE
help
This adds AMD-specific powersave bias function to the ondemand
governor, which allows it to make more power-conscious frequency
obj-$(CONFIG_ARM_SA1100_CPUFREQ) += sa1100-cpufreq.o
obj-$(CONFIG_ARM_SA1110_CPUFREQ) += sa1110-cpufreq.o
obj-$(CONFIG_ARM_SPEAR_CPUFREQ) += spear-cpufreq.o
-obj-$(CONFIG_ARCH_TEGRA) += tegra-cpufreq.o
+obj-$(CONFIG_ARM_TEGRA_CPUFREQ) += tegra-cpufreq.o
##################################################################################
# PowerPC platform drivers
ppc-cbe-cpufreq-y += ppc_cbe_cpufreq_pervasive.o ppc_cbe_cpufreq.o
obj-$(CONFIG_CPU_FREQ_CBE_PMI) += ppc_cbe_cpufreq_pmi.o
obj-$(CONFIG_CPU_FREQ_MAPLE) += maple-cpufreq.o
+obj-$(CONFIG_PPC_CORENET_CPUFREQ) += ppc-corenet-cpufreq.o
+obj-$(CONFIG_CPU_FREQ_PMAC) += pmac32-cpufreq.o
+obj-$(CONFIG_CPU_FREQ_PMAC64) += pmac64-cpufreq.o
+obj-$(CONFIG_PPC_PASEMI_CPUFREQ) += pasemi-cpufreq.o
##################################################################################
# Other platform drivers
obj-$(CONFIG_AVR32_AT32AP_CPUFREQ) += at32ap-cpufreq.o
-obj-$(CONFIG_BLACKFIN) += blackfin-cpufreq.o
+obj-$(CONFIG_BFIN_CPU_FREQ) += blackfin-cpufreq.o
obj-$(CONFIG_CRIS_MACH_ARTPEC3) += cris-artpec3-cpufreq.o
obj-$(CONFIG_ETRAXFS) += cris-etraxfs-cpufreq.o
obj-$(CONFIG_IA64_ACPI_CPUFREQ) += ia64-acpi-cpufreq.o
perf = data->acpi_data;
for (i = 0; data->freq_table[i].frequency != CPUFREQ_TABLE_END; i++) {
- if (msr == perf->states[data->freq_table[i].index].status)
+ if (msr == perf->states[data->freq_table[i].driver_data].status)
return data->freq_table[i].frequency;
}
return data->freq_table[0].frequency;
goto out;
}
- next_perf_state = data->freq_table[next_state].index;
+ next_perf_state = data->freq_table[next_state].driver_data;
if (perf->state == next_perf_state) {
if (unlikely(data->resume)) {
pr_debug("Called after resume, resetting to P%d\n",
pr_debug("acpi_cpufreq_target failed (%d)\n",
policy->cpu);
result = -EAGAIN;
- goto out;
+ freqs.new = freqs.old;
}
}
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
- perf->state = next_perf_state;
+
+ if (!result)
+ perf->state = next_perf_state;
out:
return result;
data->freq_table[valid_states-1].frequency / 1000)
continue;
- data->freq_table[valid_states].index = i;
+ data->freq_table[valid_states].driver_data = i;
data->freq_table[valid_states].frequency =
perf->states[i].core_frequency * 1000;
valid_states++;
/* We create the boost file in any case, though for systems without
* hardware support it will be read-only and hardwired to return 0.
*/
- if (sysfs_create_file(cpufreq_global_kobject, &(global_boost.attr)))
+ if (cpufreq_sysfs_create_file(&(global_boost.attr)))
pr_warn(PFX "could not register global boost sysfs file\n");
else
pr_debug("registered global boost sysfs file\n");
static void __exit acpi_cpufreq_boost_exit(void)
{
- sysfs_remove_file(cpufreq_global_kobject, &(global_boost.attr));
+ cpufreq_sysfs_remove_file(&(global_boost.attr));
if (msrs) {
unregister_cpu_notifier(&boost_nb);
ret = clk_set_rate(clk[cur_cluster], freqs.new * 1000);
if (ret) {
pr_err("clk_set_rate failed: %d\n", ret);
- return ret;
+ freqs.new = freqs.old;
}
- policy->cur = freqs.new;
-
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
return ret;
/* this is the table of CCLK frequencies, in Hz */
-/* .index is the entry in the auxiliary dpm_state_table[] */
+/* .driver_data is the entry in the auxiliary dpm_state_table[] */
static struct cpufreq_frequency_table bfin_freq_table[] = {
{
.frequency = CPUFREQ_TABLE_END,
- .index = 0,
+ .driver_data = 0,
},
{
.frequency = CPUFREQ_TABLE_END,
- .index = 1,
+ .driver_data = 1,
},
{
.frequency = CPUFREQ_TABLE_END,
- .index = 2,
+ .driver_data = 2,
},
{
.frequency = CPUFREQ_TABLE_END,
- .index = 0,
+ .driver_data = 0,
},
};
*
* Copyright (C) 2001 Russell King
* (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
+ * (C) 2013 Viresh Kumar <viresh.kumar@linaro.org>
*
* Oct 2005 - Ashok Raj <ashok.raj@intel.com>
* Added handling for CPU hotplug
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <asm/cputime.h>
#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/notifier.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
+#include <linux/tick.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/cpu.h>
*/
static struct cpufreq_driver *cpufreq_driver;
static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
+static DEFINE_RWLOCK(cpufreq_driver_lock);
+static DEFINE_MUTEX(cpufreq_governor_lock);
+
#ifdef CONFIG_HOTPLUG_CPU
/* This one keeps track of the previously set governor of a removed CPU */
static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor);
#endif
-static DEFINE_RWLOCK(cpufreq_driver_lock);
/*
* cpu_policy_rwsem is a per CPU reader-writer semaphore designed to cure
{
return cpufreq_driver->have_governor_per_policy;
}
+EXPORT_SYMBOL_GPL(have_governor_per_policy);
+
+struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy)
+{
+ if (have_governor_per_policy())
+ return &policy->kobj;
+ else
+ return cpufreq_global_kobject;
+}
+EXPORT_SYMBOL_GPL(get_governor_parent_kobj);
+
+static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
+{
+ u64 idle_time;
+ u64 cur_wall_time;
+ u64 busy_time;
+
+ cur_wall_time = jiffies64_to_cputime64(get_jiffies_64());
+
+ busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER];
+ busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SYSTEM];
+ busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ];
+ busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SOFTIRQ];
+ busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_STEAL];
+ busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE];
+
+ idle_time = cur_wall_time - busy_time;
+ if (wall)
+ *wall = cputime_to_usecs(cur_wall_time);
+
+ return cputime_to_usecs(idle_time);
+}
+
+u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy)
+{
+ u64 idle_time = get_cpu_idle_time_us(cpu, io_busy ? wall : NULL);
+
+ if (idle_time == -1ULL)
+ return get_cpu_idle_time_jiffy(cpu, wall);
+ else if (!io_busy)
+ idle_time += get_cpu_iowait_time_us(cpu, wall);
+
+ return idle_time;
+}
+EXPORT_SYMBOL_GPL(get_cpu_idle_time);
static struct cpufreq_policy *__cpufreq_cpu_get(unsigned int cpu, bool sysfs)
{
if (!try_module_get(cpufreq_driver->owner))
goto err_out_unlock;
-
/* get the CPU */
data = per_cpu(cpufreq_cpu_data, cpu);
*/
#ifndef CONFIG_SMP
static unsigned long l_p_j_ref;
-static unsigned int l_p_j_ref_freq;
+static unsigned int l_p_j_ref_freq;
static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
{
pr_debug("saving %lu as reference value for loops_per_jiffy; "
"freq is %u kHz\n", l_p_j_ref, l_p_j_ref_freq);
}
- if ((val == CPUFREQ_POSTCHANGE && ci->old != ci->new) ||
+ if ((val == CPUFREQ_POSTCHANGE && ci->old != ci->new) ||
(val == CPUFREQ_RESUMECHANGE || val == CPUFREQ_SUSPENDCHANGE)) {
loops_per_jiffy = cpufreq_scale(l_p_j_ref, l_p_j_ref_freq,
ci->new);
}
#endif
-
-void __cpufreq_notify_transition(struct cpufreq_policy *policy,
+static void __cpufreq_notify_transition(struct cpufreq_policy *policy,
struct cpufreq_freqs *freqs, unsigned int state)
{
BUG_ON(irqs_disabled());
break;
}
}
+
/**
* cpufreq_notify_transition - call notifier chain and adjust_jiffies
* on frequency transition.
EXPORT_SYMBOL_GPL(cpufreq_notify_transition);
-
/*********************************************************************
* SYSFS INTERFACE *
*********************************************************************/
return err;
}
-
/**
* cpufreq_per_cpu_attr_read() / show_##file_name() -
* print out cpufreq information
return sprintf(buf, "%u\n", cur_freq);
}
-
/**
* show_scaling_governor - show the current policy for the specified CPU
*/
return -EINVAL;
}
-
/**
* store_scaling_governor - store policy for the specified CPU
*/
&new_policy.governor))
return -EINVAL;
- /* Do not use cpufreq_set_policy here or the user_policy.max
- will be wrongly overridden */
+ /*
+ * Do not use cpufreq_set_policy here or the user_policy.max
+ * will be wrongly overridden
+ */
ret = __cpufreq_set_policy(policy, &new_policy);
policy->user_policy.policy = policy->policy;
NULL
};
-struct kobject *cpufreq_global_kobject;
-EXPORT_SYMBOL(cpufreq_global_kobject);
-
#define to_policy(k) container_of(k, struct cpufreq_policy, kobj)
#define to_attr(a) container_of(a, struct freq_attr, attr)
.release = cpufreq_sysfs_release,
};
+struct kobject *cpufreq_global_kobject;
+EXPORT_SYMBOL(cpufreq_global_kobject);
+
+static int cpufreq_global_kobject_usage;
+
+int cpufreq_get_global_kobject(void)
+{
+ if (!cpufreq_global_kobject_usage++)
+ return kobject_add(cpufreq_global_kobject,
+ &cpu_subsys.dev_root->kobj, "%s", "cpufreq");
+
+ return 0;
+}
+EXPORT_SYMBOL(cpufreq_get_global_kobject);
+
+void cpufreq_put_global_kobject(void)
+{
+ if (!--cpufreq_global_kobject_usage)
+ kobject_del(cpufreq_global_kobject);
+}
+EXPORT_SYMBOL(cpufreq_put_global_kobject);
+
+int cpufreq_sysfs_create_file(const struct attribute *attr)
+{
+ int ret = cpufreq_get_global_kobject();
+
+ if (!ret) {
+ ret = sysfs_create_file(cpufreq_global_kobject, attr);
+ if (ret)
+ cpufreq_put_global_kobject();
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(cpufreq_sysfs_create_file);
+
+void cpufreq_sysfs_remove_file(const struct attribute *attr)
+{
+ sysfs_remove_file(cpufreq_global_kobject, attr);
+ cpufreq_put_global_kobject();
+}
+EXPORT_SYMBOL(cpufreq_sysfs_remove_file);
+
/* symlink affected CPUs */
static int cpufreq_add_dev_symlink(unsigned int cpu,
struct cpufreq_policy *policy)
* Caller should already have policy_rwsem in write mode for this CPU.
* This routine frees the rwsem before returning.
*/
-static int __cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
+static int __cpufreq_remove_dev(struct device *dev,
+ struct subsys_interface *sif)
{
unsigned int cpu = dev->id, ret, cpus;
unsigned long flags;
return 0;
}
-
static int cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
{
unsigned int cpu = dev->id;
return retval;
}
-
static void handle_update(struct work_struct *work)
{
struct cpufreq_policy *policy =
}
/**
- * cpufreq_out_of_sync - If actual and saved CPU frequency differs, we're in deep trouble.
+ * cpufreq_out_of_sync - If actual and saved CPU frequency differs, we're
+ * in deep trouble.
* @cpu: cpu number
* @old_freq: CPU frequency the kernel thinks the CPU runs at
* @new_freq: CPU frequency the CPU actually runs at
struct cpufreq_freqs freqs;
unsigned long flags;
-
pr_debug("Warning: CPU frequency out of sync: cpufreq and timing "
"core thinks of %u, is %u kHz.\n", old_freq, new_freq);
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
}
-
/**
* cpufreq_quick_get - get the CPU frequency (in kHz) from policy->cur
* @cpu: CPU number
}
EXPORT_SYMBOL(cpufreq_quick_get_max);
-
static unsigned int __cpufreq_get(unsigned int cpu)
{
struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
.remove_dev = cpufreq_remove_dev,
};
-
/**
* cpufreq_bp_suspend - Prepare the boot CPU for system suspend.
*
}
EXPORT_SYMBOL(cpufreq_register_notifier);
-
/**
* cpufreq_unregister_notifier - unregister a driver with cpufreq
* @nb: notifier block to be unregistered
- * @list: CPUFREQ_TRANSITION_NOTIFIER or CPUFREQ_POLICY_NOTIFIER
+ * @list: CPUFREQ_TRANSITION_NOTIFIER or CPUFREQ_POLICY_NOTIFIER
*
* Remove a driver from the CPU frequency notifier list.
*
* GOVERNORS *
*********************************************************************/
-
int __cpufreq_driver_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
int ret = -EINVAL;
- policy = cpufreq_cpu_get(policy->cpu);
- if (!policy)
- goto no_policy;
-
if (unlikely(lock_policy_rwsem_write(policy->cpu)))
goto fail;
unlock_policy_rwsem_write(policy->cpu);
fail:
- cpufreq_cpu_put(policy);
-no_policy:
return ret;
}
EXPORT_SYMBOL_GPL(cpufreq_driver_target);
int __cpufreq_driver_getavg(struct cpufreq_policy *policy, unsigned int cpu)
{
- int ret = 0;
-
if (cpufreq_disabled())
- return ret;
+ return 0;
if (!cpufreq_driver->getavg)
return 0;
- policy = cpufreq_cpu_get(policy->cpu);
- if (!policy)
- return -EINVAL;
-
- ret = cpufreq_driver->getavg(policy, cpu);
-
- cpufreq_cpu_put(policy);
- return ret;
+ return cpufreq_driver->getavg(policy, cpu);
}
EXPORT_SYMBOL_GPL(__cpufreq_driver_getavg);
pr_debug("__cpufreq_governor for CPU %u, event %u\n",
policy->cpu, event);
+
+ mutex_lock(&cpufreq_governor_lock);
+ if ((!policy->governor_enabled && (event == CPUFREQ_GOV_STOP)) ||
+ (policy->governor_enabled && (event == CPUFREQ_GOV_START))) {
+ mutex_unlock(&cpufreq_governor_lock);
+ return -EBUSY;
+ }
+
+ if (event == CPUFREQ_GOV_STOP)
+ policy->governor_enabled = false;
+ else if (event == CPUFREQ_GOV_START)
+ policy->governor_enabled = true;
+
+ mutex_unlock(&cpufreq_governor_lock);
+
ret = policy->governor->governor(policy, event);
if (!ret) {
policy->governor->initialized++;
else if (event == CPUFREQ_GOV_POLICY_EXIT)
policy->governor->initialized--;
+ } else {
+ /* Restore original values */
+ mutex_lock(&cpufreq_governor_lock);
+ if (event == CPUFREQ_GOV_STOP)
+ policy->governor_enabled = true;
+ else if (event == CPUFREQ_GOV_START)
+ policy->governor_enabled = false;
+ mutex_unlock(&cpufreq_governor_lock);
}
/* we keep one module reference alive for
return ret;
}
-
int cpufreq_register_governor(struct cpufreq_governor *governor)
{
int err;
}
EXPORT_SYMBOL_GPL(cpufreq_register_governor);
-
void cpufreq_unregister_governor(struct cpufreq_governor *governor)
{
#ifdef CONFIG_HOTPLUG_CPU
EXPORT_SYMBOL_GPL(cpufreq_unregister_governor);
-
/*********************************************************************
* POLICY INTERFACE *
*********************************************************************/
}
EXPORT_SYMBOL(cpufreq_get_policy);
-
/*
* data : current policy.
* policy : policy to be set.
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_INCOMPATIBLE, policy);
- /* verify the cpu speed can be set within this limit,
- which might be different to the first one */
+ /*
+ * verify the cpu speed can be set within this limit, which might be
+ * different to the first one
+ */
ret = cpufreq_driver->verify(policy);
if (ret)
goto error_out;
policy.policy = data->user_policy.policy;
policy.governor = data->user_policy.governor;
- /* BIOS might change freq behind our back
- -> ask driver for current freq and notify governors about a change */
+ /*
+ * BIOS might change freq behind our back
+ * -> ask driver for current freq and notify governors about a change
+ */
if (cpufreq_driver->get) {
policy.cur = cpufreq_driver->get(cpu);
if (!data->cur) {
}
static struct notifier_block __refdata cpufreq_cpu_notifier = {
- .notifier_call = cpufreq_cpu_callback,
+ .notifier_call = cpufreq_cpu_callback,
};
/*********************************************************************
* @driver_data: A struct cpufreq_driver containing the values#
* submitted by the CPU Frequency driver.
*
- * Registers a CPU Frequency driver to this core code. This code
+ * Registers a CPU Frequency driver to this core code. This code
* returns zero on success, -EBUSY when another driver got here first
* (and isn't unregistered in the meantime).
*
}
EXPORT_SYMBOL_GPL(cpufreq_register_driver);
-
/**
* cpufreq_unregister_driver - unregister the current CPUFreq driver
*
- * Unregister the current CPUFreq driver. Only call this if you have
+ * Unregister the current CPUFreq driver. Only call this if you have
* the right to do so, i.e. if you have succeeded in initialising before!
* Returns zero if successful, and -EINVAL if the cpufreq_driver is
* currently not initialised.
init_rwsem(&per_cpu(cpu_policy_rwsem, cpu));
}
- cpufreq_global_kobject = kobject_create_and_add("cpufreq", &cpu_subsys.dev_root->kobj);
+ cpufreq_global_kobject = kobject_create();
BUG_ON(!cpufreq_global_kobject);
register_syscore_ops(&cpufreq_syscore_ops);
#include <linux/kernel_stat.h>
#include <linux/mutex.h>
#include <linux/slab.h>
-#include <linux/tick.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include <linux/cpu.h>
#include "cpufreq_governor.h"
-static struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy)
-{
- if (have_governor_per_policy())
- return &policy->kobj;
- else
- return cpufreq_global_kobject;
-}
-
static struct attribute_group *get_sysfs_attr(struct dbs_data *dbs_data)
{
if (have_governor_per_policy())
return dbs_data->cdata->attr_group_gov_sys;
}
-static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
-{
- u64 idle_time;
- u64 cur_wall_time;
- u64 busy_time;
-
- cur_wall_time = jiffies64_to_cputime64(get_jiffies_64());
-
- busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER];
- busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SYSTEM];
- busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ];
- busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SOFTIRQ];
- busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_STEAL];
- busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE];
-
- idle_time = cur_wall_time - busy_time;
- if (wall)
- *wall = cputime_to_usecs(cur_wall_time);
-
- return cputime_to_usecs(idle_time);
-}
-
-u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy)
-{
- u64 idle_time = get_cpu_idle_time_us(cpu, io_busy ? wall : NULL);
-
- if (idle_time == -1ULL)
- return get_cpu_idle_time_jiffy(cpu, wall);
- else if (!io_busy)
- idle_time += get_cpu_iowait_time_us(cpu, wall);
-
- return idle_time;
-}
-EXPORT_SYMBOL_GPL(get_cpu_idle_time);
-
void dbs_check_cpu(struct dbs_data *dbs_data, int cpu)
{
struct cpu_dbs_common_info *cdbs = dbs_data->cdata->get_cpu_cdbs(cpu);
return rc;
}
+ if (!have_governor_per_policy())
+ WARN_ON(cpufreq_get_global_kobject());
+
rc = sysfs_create_group(get_governor_parent_kobj(policy),
get_sysfs_attr(dbs_data));
if (rc) {
sysfs_remove_group(get_governor_parent_kobj(policy),
get_sysfs_attr(dbs_data));
+ if (!have_governor_per_policy())
+ cpufreq_put_global_kobject();
+
if ((dbs_data->cdata->governor == GOV_CONSERVATIVE) &&
(policy->governor->initialized == 1)) {
struct cs_ops *cs_ops = dbs_data->cdata->gov_ops;
return sprintf(buf, "%u\n", tuners->file_name); \
} \
\
-static ssize_t show_##file_name##_gov_pol \
+static ssize_t show_##file_name##_gov_pol \
(struct cpufreq_policy *policy, char *buf) \
{ \
struct dbs_data *dbs_data = policy->governor_data; \
#define store_one(_gov, file_name) \
static ssize_t store_##file_name##_gov_sys \
-(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) \
+(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) \
{ \
struct dbs_data *dbs_data = _gov##_dbs_cdata.gdbs_data; \
return store_##file_name(dbs_data, buf, count); \
return sprintf(buf, "%u\n", dbs_data->min_sampling_rate); \
}
-u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
void dbs_check_cpu(struct dbs_data *dbs_data, int cpu);
bool need_load_eval(struct cpu_dbs_common_info *cdbs,
unsigned int sampling_rate);
#include <linux/cpufreq.h>
#include <linux/init.h>
-
static int cpufreq_governor_performance(struct cpufreq_policy *policy,
unsigned int event)
{
.owner = THIS_MODULE,
};
-
static int __init cpufreq_gov_performance_init(void)
{
return cpufreq_register_governor(&cpufreq_gov_performance);
}
-
static void __exit cpufreq_gov_performance_exit(void)
{
cpufreq_unregister_governor(&cpufreq_gov_performance);
}
-
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION("CPUfreq policy governor 'performance'");
MODULE_LICENSE("GPL");
/*
- * linux/drivers/cpufreq/cpufreq_powersave.c
+ * linux/drivers/cpufreq/cpufreq_powersave.c
*
- * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
+ * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
*
*
* This program is free software; you can redistribute it and/or modify
return cpufreq_register_governor(&cpufreq_gov_powersave);
}
-
static void __exit cpufreq_gov_powersave_exit(void)
{
cpufreq_unregister_governor(&cpufreq_gov_powersave);
}
-
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
MODULE_LICENSE("GPL");
struct cpufreq_stats {
unsigned int cpu;
unsigned int total_trans;
- unsigned long long last_time;
+ unsigned long long last_time;
unsigned int max_state;
unsigned int state_num;
unsigned int last_index;
len += snprintf(buf + len, PAGE_SIZE - len, "%9u: ",
stat->freq_table[i]);
- for (j = 0; j < stat->state_num; j++) {
+ for (j = 0; j < stat->state_num; j++) {
if (len >= PAGE_SIZE)
break;
len += snprintf(buf + len, PAGE_SIZE - len, "%9u ",
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/smp.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
#include <linux/cpufreq.h>
-#include <linux/cpu.h>
-#include <linux/types.h>
-#include <linux/fs.h>
-#include <linux/sysfs.h>
+#include <linux/init.h>
+#include <linux/module.h>
#include <linux/mutex.h>
-/**
- * A few values needed by the userspace governor
- */
-static DEFINE_PER_CPU(unsigned int, cpu_max_freq);
-static DEFINE_PER_CPU(unsigned int, cpu_min_freq);
-static DEFINE_PER_CPU(unsigned int, cpu_cur_freq); /* current CPU freq */
-static DEFINE_PER_CPU(unsigned int, cpu_set_freq); /* CPU freq desired by
- userspace */
static DEFINE_PER_CPU(unsigned int, cpu_is_managed);
-
static DEFINE_MUTEX(userspace_mutex);
-static int cpus_using_userspace_governor;
-
-/* keep track of frequency transitions */
-static int
-userspace_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
- void *data)
-{
- struct cpufreq_freqs *freq = data;
-
- if (!per_cpu(cpu_is_managed, freq->cpu))
- return 0;
-
- if (val == CPUFREQ_POSTCHANGE) {
- pr_debug("saving cpu_cur_freq of cpu %u to be %u kHz\n",
- freq->cpu, freq->new);
- per_cpu(cpu_cur_freq, freq->cpu) = freq->new;
- }
-
- return 0;
-}
-
-static struct notifier_block userspace_cpufreq_notifier_block = {
- .notifier_call = userspace_cpufreq_notifier
-};
-
/**
* cpufreq_set - set the CPU frequency
if (!per_cpu(cpu_is_managed, policy->cpu))
goto err;
- per_cpu(cpu_set_freq, policy->cpu) = freq;
-
- if (freq < per_cpu(cpu_min_freq, policy->cpu))
- freq = per_cpu(cpu_min_freq, policy->cpu);
- if (freq > per_cpu(cpu_max_freq, policy->cpu))
- freq = per_cpu(cpu_max_freq, policy->cpu);
-
/*
* We're safe from concurrent calls to ->target() here
* as we hold the userspace_mutex lock. If we were calling
return ret;
}
-
static ssize_t show_speed(struct cpufreq_policy *policy, char *buf)
{
- return sprintf(buf, "%u\n", per_cpu(cpu_cur_freq, policy->cpu));
+ return sprintf(buf, "%u\n", policy->cur);
}
static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
switch (event) {
case CPUFREQ_GOV_START:
BUG_ON(!policy->cur);
- mutex_lock(&userspace_mutex);
-
- if (cpus_using_userspace_governor == 0) {
- cpufreq_register_notifier(
- &userspace_cpufreq_notifier_block,
- CPUFREQ_TRANSITION_NOTIFIER);
- }
- cpus_using_userspace_governor++;
+ pr_debug("started managing cpu %u\n", cpu);
+ mutex_lock(&userspace_mutex);
per_cpu(cpu_is_managed, cpu) = 1;
- per_cpu(cpu_min_freq, cpu) = policy->min;
- per_cpu(cpu_max_freq, cpu) = policy->max;
- per_cpu(cpu_cur_freq, cpu) = policy->cur;
- per_cpu(cpu_set_freq, cpu) = policy->cur;
- pr_debug("managing cpu %u started "
- "(%u - %u kHz, currently %u kHz)\n",
- cpu,
- per_cpu(cpu_min_freq, cpu),
- per_cpu(cpu_max_freq, cpu),
- per_cpu(cpu_cur_freq, cpu));
-
mutex_unlock(&userspace_mutex);
break;
case CPUFREQ_GOV_STOP:
- mutex_lock(&userspace_mutex);
- cpus_using_userspace_governor--;
- if (cpus_using_userspace_governor == 0) {
- cpufreq_unregister_notifier(
- &userspace_cpufreq_notifier_block,
- CPUFREQ_TRANSITION_NOTIFIER);
- }
+ pr_debug("managing cpu %u stopped\n", cpu);
+ mutex_lock(&userspace_mutex);
per_cpu(cpu_is_managed, cpu) = 0;
- per_cpu(cpu_min_freq, cpu) = 0;
- per_cpu(cpu_max_freq, cpu) = 0;
- per_cpu(cpu_set_freq, cpu) = 0;
- pr_debug("managing cpu %u stopped\n", cpu);
mutex_unlock(&userspace_mutex);
break;
case CPUFREQ_GOV_LIMITS:
mutex_lock(&userspace_mutex);
- pr_debug("limit event for cpu %u: %u - %u kHz, "
- "currently %u kHz, last set to %u kHz\n",
+ pr_debug("limit event for cpu %u: %u - %u kHz, currently %u kHz\n",
cpu, policy->min, policy->max,
- per_cpu(cpu_cur_freq, cpu),
- per_cpu(cpu_set_freq, cpu));
- if (policy->max < per_cpu(cpu_set_freq, cpu)) {
+ policy->cur);
+
+ if (policy->max < policy->cur)
__cpufreq_driver_target(policy, policy->max,
CPUFREQ_RELATION_H);
- } else if (policy->min > per_cpu(cpu_set_freq, cpu)) {
+ else if (policy->min > policy->cur)
__cpufreq_driver_target(policy, policy->min,
CPUFREQ_RELATION_L);
- } else {
- __cpufreq_driver_target(policy,
- per_cpu(cpu_set_freq, cpu),
- CPUFREQ_RELATION_L);
- }
- per_cpu(cpu_min_freq, cpu) = policy->min;
- per_cpu(cpu_max_freq, cpu) = policy->max;
- per_cpu(cpu_cur_freq, cpu) = policy->cur;
mutex_unlock(&userspace_mutex);
break;
}
return rc;
}
-
#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE
static
#endif
return cpufreq_register_governor(&cpufreq_gov_userspace);
}
-
static void __exit cpufreq_gov_userspace_exit(void)
{
cpufreq_unregister_governor(&cpufreq_gov_userspace);
}
-
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>, "
"Russell King <rmk@arm.linux.org.uk>");
MODULE_DESCRIPTION("CPUfreq policy governor 'userspace'");
pdata->set_voltage(idx);
out:
+ if (ret)
+ freqs.new = freqs.old;
+
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
return ret;
if (ret) {
pr_err("dbx500-cpufreq: Failed to set armss_clk to %d Hz: error %d\n",
freqs.new * 1000, ret);
- return ret;
+ freqs.new = freqs.old;
}
/* post change notification */
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
- return 0;
+ return ret;
}
static unsigned int dbx500_cpufreq_getspeed(unsigned int cpu)
current_multiplier);
}
#endif
+ if (err)
+ freqs.new = freqs.old;
+
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
return err;
}
}
/* Make frequency transition */
- dest_state = centaur->freq_table[newstate].index & 0xffff;
+ dest_state = centaur->freq_table[newstate].driver_data & 0xffff;
ret = eps_set_state(centaur, policy, dest_state);
if (ret)
printk(KERN_ERR "eps: Timeout!\n");
f_table = ¢aur->freq_table[0];
if (brand != EPS_BRAND_C7M) {
f_table[0].frequency = fsb * min_multiplier;
- f_table[0].index = (min_multiplier << 8) | min_voltage;
+ f_table[0].driver_data = (min_multiplier << 8) | min_voltage;
f_table[1].frequency = fsb * max_multiplier;
- f_table[1].index = (max_multiplier << 8) | max_voltage;
+ f_table[1].driver_data = (max_multiplier << 8) | max_voltage;
f_table[2].frequency = CPUFREQ_TABLE_END;
} else {
k = 0;
for (i = min_multiplier; i <= max_multiplier; i++) {
voltage = (k * step) / 256 + min_voltage;
f_table[k].frequency = fsb * i;
- f_table[k].index = (i << 8) | voltage;
+ f_table[k].driver_data = (i << 8) | voltage;
k++;
}
f_table[k].frequency = CPUFREQ_TABLE_END;
if (ret) {
pr_err("%s: failed to set cpu voltage to %d\n",
__func__, arm_volt);
- goto out;
+ freqs.new = freqs.old;
+ goto post_notify;
}
}
if (ret) {
pr_err("%s: failed to set cpu voltage to %d\n",
__func__, safe_arm_volt);
- goto out;
+ freqs.new = freqs.old;
+ goto post_notify;
}
}
exynos_info->set_freq(old_index, index);
+post_notify:
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+ if (ret)
+ goto out;
+
/* When the new frequency is lower than current frequency */
if ((freqs.new < freqs.old) ||
((freqs.new > freqs.old) && safe_arm_volt)) {
continue;
}
- pr_debug("table entry %u: %u kHz, %u index\n",
- i, freq, table[i].index);
+ pr_debug("table entry %u: %u kHz, %u driver_data\n",
+ i, freq, table[i].driver_data);
if (freq < min_freq)
min_freq = freq;
if (freq > max_freq)
unsigned int *index)
{
struct cpufreq_frequency_table optimal = {
- .index = ~0,
+ .driver_data = ~0,
.frequency = 0,
};
struct cpufreq_frequency_table suboptimal = {
- .index = ~0,
+ .driver_data = ~0,
.frequency = 0,
};
unsigned int i;
if (freq <= target_freq) {
if (freq >= optimal.frequency) {
optimal.frequency = freq;
- optimal.index = i;
+ optimal.driver_data = i;
}
} else {
if (freq <= suboptimal.frequency) {
suboptimal.frequency = freq;
- suboptimal.index = i;
+ suboptimal.driver_data = i;
}
}
break;
if (freq >= target_freq) {
if (freq <= optimal.frequency) {
optimal.frequency = freq;
- optimal.index = i;
+ optimal.driver_data = i;
}
} else {
if (freq >= suboptimal.frequency) {
suboptimal.frequency = freq;
- suboptimal.index = i;
+ suboptimal.driver_data = i;
}
}
break;
}
}
- if (optimal.index > i) {
- if (suboptimal.index > i)
+ if (optimal.driver_data > i) {
+ if (suboptimal.driver_data > i)
return -EINVAL;
- *index = suboptimal.index;
+ *index = suboptimal.driver_data;
} else
- *index = optimal.index;
+ *index = optimal.driver_data;
pr_debug("target is %u (%u kHz, %u)\n", *index, table[*index].frequency,
- table[*index].index);
+ table[*index].driver_data);
return 0;
}
/* table init */
for (i = 0; i <= data->acpi_data.state_count; i++)
{
- data->freq_table[i].index = i;
+ data->freq_table[i].driver_data = i;
if (i < data->acpi_data.state_count) {
data->freq_table[i].frequency =
data->acpi_data.states[i].core_frequency * 1000;
if (freqs.old == freqs.new)
return 0;
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
rcu_read_lock();
opp = opp_find_freq_ceil(cpu_dev, &freq_hz);
if (IS_ERR(opp)) {
freqs.old / 1000, volt_old / 1000,
freqs.new / 1000, volt / 1000);
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+
/* scaling up? scale voltage before frequency */
if (freqs.new > freqs.old) {
ret = regulator_set_voltage_tol(arm_reg, volt, 0);
if (ret) {
dev_err(cpu_dev,
"failed to scale vddarm up: %d\n", ret);
- return ret;
+ freqs.new = freqs.old;
+ goto post_notify;
}
/*
if (ret) {
dev_err(cpu_dev, "failed to set clock rate: %d\n", ret);
regulator_set_voltage_tol(arm_reg, volt_old, 0);
- return ret;
+ freqs.new = freqs.old;
+ goto post_notify;
}
/* scaling down? scale voltage after frequency */
if (freqs.new < freqs.old) {
ret = regulator_set_voltage_tol(arm_reg, volt, 0);
- if (ret)
+ if (ret) {
dev_warn(cpu_dev,
"failed to scale vddarm down: %d\n", ret);
+ ret = 0;
+ }
if (freqs.old == FREQ_1P2_GHZ / 1000) {
regulator_set_voltage_tol(pu_reg,
}
}
+post_notify:
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
- return 0;
+ return ret;
}
static int imx6q_cpufreq_init(struct cpufreq_policy *policy)
unsigned int index)
{
struct cpufreq_freqs freqs;
- unsigned int state = kirkwood_freq_table[index].index;
+ unsigned int state = kirkwood_freq_table[index].driver_data;
unsigned long reg;
freqs.old = kirkwood_cpufreq_get_cpu_frequency(0);
u32 bm_timeout = 1000;
unsigned int dir = 0;
- mults_index = longhaul_table[table_index].index;
+ mults_index = longhaul_table[table_index].driver_data;
/* Safety precautions */
mult = mults[mults_index & 0x1f];
if (mult == -1)
if (ratio > maxmult || ratio < minmult)
continue;
longhaul_table[k].frequency = calc_speed(ratio);
- longhaul_table[k].index = j;
+ longhaul_table[k].driver_data = j;
k++;
}
if (k <= 1) {
if (min_i != j) {
swap(longhaul_table[j].frequency,
longhaul_table[min_i].frequency);
- swap(longhaul_table[j].index,
- longhaul_table[min_i].index);
+ swap(longhaul_table[j].driver_data,
+ longhaul_table[min_i].driver_data);
}
}
/* Find index we are running on */
for (j = 0; j < k; j++) {
- if (mults[longhaul_table[j].index & 0x1f] == mult) {
+ if (mults[longhaul_table[j].driver_data & 0x1f] == mult) {
longhaul_index = j;
break;
}
pos = (speed - min_vid_speed) / kHz_step + minvid.pos;
else
pos = minvid.pos;
- longhaul_table[j].index |= mV_vrm_table[pos] << 8;
+ longhaul_table[j].driver_data |= mV_vrm_table[pos] << 8;
vid = vrm_mV_table[mV_vrm_table[pos]];
printk(KERN_INFO PFX "f: %d kHz, index: %d, vid: %d mV\n",
speed, j, vid.mV);
* this in hardware, C3 is old and we need to do this
* in software. */
i = longhaul_index;
- current_vid = (longhaul_table[longhaul_index].index >> 8);
+ current_vid = (longhaul_table[longhaul_index].driver_data >> 8);
current_vid &= 0x1f;
if (table_index > longhaul_index)
dir = 1;
while (i != table_index) {
- vid = (longhaul_table[i].index >> 8) & 0x1f;
+ vid = (longhaul_table[i].driver_data >> 8) & 0x1f;
if (vid != current_vid) {
longhaul_setstate(policy, i);
current_vid = vid;
freq =
((cpu_clock_freq / 1000) *
- loongson2_clockmod_table[newstate].index) / 8;
+ loongson2_clockmod_table[newstate].driver_data) / 8;
if (freq < policy->min || freq > policy->max)
return -EINVAL;
if (freqs.old == freqs.new && policy->cur == freqs.new)
return ret;
- /* notifiers */
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
freq = freqs.new * 1000;
ret = clk_round_rate(mpu_clk, freq);
if (IS_ERR_VALUE(ret)) {
freqs.old / 1000, volt_old ? volt_old / 1000 : -1,
freqs.new / 1000, volt ? volt / 1000 : -1);
+ /* notifiers */
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+
/* scaling up? scale voltage before frequency */
if (mpu_reg && (freqs.new > freqs.old)) {
r = regulator_set_voltage(mpu_reg, volt - tol, volt + tol);
return -EINVAL;
freqs.old = cpufreq_p4_get(policy->cpu);
- freqs.new = stock_freq * p4clockmod_table[newstate].index / 8;
+ freqs.new = stock_freq * p4clockmod_table[newstate].driver_data / 8;
if (freqs.new == freqs.old)
return 0;
* Developer's Manual, Volume 3
*/
for_each_cpu(i, policy->cpus)
- cpufreq_p4_setdc(i, p4clockmod_table[newstate].index);
+ cpufreq_p4_setdc(i, p4clockmod_table[newstate].driver_data);
/* notifiers */
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
/* initialize frequency table */
for (i=0; pas_freqs[i].frequency!=CPUFREQ_TABLE_END; i++) {
- pas_freqs[i].frequency = get_astate_freq(pas_freqs[i].index) * 100000;
+ pas_freqs[i].frequency =
+ get_astate_freq(pas_freqs[i].driver_data) * 100000;
pr_debug("%d: %d\n", i, pas_freqs[i].frequency);
}
pr_debug("setting frequency for cpu %d to %d kHz, 1/%d of max frequency\n",
policy->cpu,
pas_freqs[pas_astate_new].frequency,
- pas_freqs[pas_astate_new].index);
+ pas_freqs[pas_astate_new].driver_data);
current_astate = pas_astate_new;
return 0;
cmd_incomplete:
+ freqs.new = freqs.old;
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
iowrite16(0, &pcch_hdr->status);
spin_unlock(&pcc_lock);
return -EINVAL;
msrval = POWERNOW_IOPORT + 0x0;
wrmsr(MSR_K6_EPMR, msrval, 0); /* disable it again */
- return clock_ratio[(invalue >> 5)&7].index;
+ return clock_ratio[(invalue >> 5)&7].driver_data;
}
unsigned long msrval;
struct cpufreq_freqs freqs;
- if (clock_ratio[best_i].index > max_multiplier) {
+ if (clock_ratio[best_i].driver_data > max_multiplier) {
printk(KERN_ERR PFX "invalid target frequency\n");
return;
}
freqs.old = busfreq * powernow_k6_get_cpu_multiplier();
- freqs.new = busfreq * clock_ratio[best_i].index;
+ freqs.new = busfreq * clock_ratio[best_i].driver_data;
cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
/* table init */
for (i = 0; (clock_ratio[i].frequency != CPUFREQ_TABLE_END); i++) {
- f = clock_ratio[i].index;
+ f = clock_ratio[i].driver_data;
if (f > max_multiplier)
clock_ratio[i].frequency = CPUFREQ_ENTRY_INVALID;
else
fid = *pst++;
powernow_table[j].frequency = (fsb * fid_codes[fid]) / 10;
- powernow_table[j].index = fid; /* lower 8 bits */
+ powernow_table[j].driver_data = fid; /* lower 8 bits */
speed = powernow_table[j].frequency;
maximum_speed = speed;
vid = *pst++;
- powernow_table[j].index |= (vid << 8); /* upper 8 bits */
+ powernow_table[j].driver_data |= (vid << 8); /* upper 8 bits */
pr_debug(" FID: 0x%x (%d.%dx [%dMHz]) "
"VID: 0x%x (%d.%03dV)\n", fid, fid_codes[fid] / 10,
mobile_vid_table[vid]%1000);
}
powernow_table[number_scales].frequency = CPUFREQ_TABLE_END;
- powernow_table[number_scales].index = 0;
+ powernow_table[number_scales].driver_data = 0;
return 0;
}
* vid are the upper 8 bits.
*/
- fid = powernow_table[index].index & 0xFF;
- vid = (powernow_table[index].index & 0xFF00) >> 8;
+ fid = powernow_table[index].driver_data & 0xFF;
+ vid = (powernow_table[index].driver_data & 0xFF00) >> 8;
rdmsrl(MSR_K7_FID_VID_STATUS, fidvidstatus.val);
cfid = fidvidstatus.bits.CFID;
fid = pc.bits.fid;
powernow_table[i].frequency = fsb * fid_codes[fid] / 10;
- powernow_table[i].index = fid; /* lower 8 bits */
- powernow_table[i].index |= (vid << 8); /* upper 8 bits */
+ powernow_table[i].driver_data = fid; /* lower 8 bits */
+ powernow_table[i].driver_data |= (vid << 8); /* upper 8 bits */
speed = powernow_table[i].frequency;
speed_mhz = speed / 1000;
}
powernow_table[i].frequency = CPUFREQ_TABLE_END;
- powernow_table[i].index = 0;
+ powernow_table[i].driver_data = 0;
/* notify BIOS that we exist */
acpi_processor_notify_smm(THIS_MODULE);
CPUFREQ_ENTRY_INVALID) {
printk(KERN_INFO PFX
"fid 0x%x (%d MHz), vid 0x%x\n",
- data->powernow_table[j].index & 0xff,
+ data->powernow_table[j].driver_data & 0xff,
data->powernow_table[j].frequency/1000,
- data->powernow_table[j].index >> 8);
+ data->powernow_table[j].driver_data >> 8);
}
}
if (data->batps)
for (j = 0; j < data->numps; j++) {
int freq;
- powernow_table[j].index = pst[j].fid; /* lower 8 bits */
- powernow_table[j].index |= (pst[j].vid << 8); /* upper 8 bits */
+ powernow_table[j].driver_data = pst[j].fid; /* lower 8 bits */
+ powernow_table[j].driver_data |= (pst[j].vid << 8); /* upper 8 bits */
freq = find_khz_freq_from_fid(pst[j].fid);
powernow_table[j].frequency = freq;
}
powernow_table[data->numps].frequency = CPUFREQ_TABLE_END;
- powernow_table[data->numps].index = 0;
+ powernow_table[data->numps].driver_data = 0;
if (query_current_values_with_pending_wait(data)) {
kfree(powernow_table);
powernow_table[data->acpi_data.state_count].frequency =
CPUFREQ_TABLE_END;
- powernow_table[data->acpi_data.state_count].index = 0;
+ powernow_table[data->acpi_data.state_count].driver_data = 0;
data->powernow_table = powernow_table;
if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu)
pr_debug(" %d : fid 0x%x, vid 0x%x\n", i, fid, vid);
index = fid | (vid<<8);
- powernow_table[i].index = index;
+ powernow_table[i].driver_data = index;
freq = find_khz_freq_from_fid(fid);
powernow_table[i].frequency = freq;
* the cpufreq frequency table in find_psb_table, vid
* are the upper 8 bits.
*/
- fid = data->powernow_table[index].index & 0xFF;
- vid = (data->powernow_table[index].index & 0xFF00) >> 8;
+ fid = data->powernow_table[index].driver_data & 0xFF;
+ vid = (data->powernow_table[index].driver_data & 0xFF00) >> 8;
pr_debug("table matched fid 0x%x, giving vid 0x%x\n", fid, vid);
res = transition_fid_vid(data, fid, vid);
if (res)
- return res;
-
- freqs.new = find_khz_freq_from_fid(data->currfid);
+ freqs.new = freqs.old;
+ else
+ freqs.new = find_khz_freq_from_fid(data->currfid);
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
return res;
--- /dev/null
+/*
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ *
+ * CPU Frequency Scaling driver for Freescale PowerPC corenet SoCs.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/clk.h>
+#include <linux/cpufreq.h>
+#include <linux/errno.h>
+#include <sysdev/fsl_soc.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+
+/**
+ * struct cpu_data - per CPU data struct
+ * @clk: the clk of CPU
+ * @parent: the parent node of cpu clock
+ * @table: frequency table
+ */
+struct cpu_data {
+ struct clk *clk;
+ struct device_node *parent;
+ struct cpufreq_frequency_table *table;
+};
+
+/**
+ * struct soc_data - SoC specific data
+ * @freq_mask: mask the disallowed frequencies
+ * @flag: unique flags
+ */
+struct soc_data {
+ u32 freq_mask[4];
+ u32 flag;
+};
+
+#define FREQ_MASK 1
+/* see hardware specification for the allowed frqeuencies */
+static const struct soc_data sdata[] = {
+ { /* used by p2041 and p3041 */
+ .freq_mask = {0x8, 0x8, 0x2, 0x2},
+ .flag = FREQ_MASK,
+ },
+ { /* used by p5020 */
+ .freq_mask = {0x8, 0x2},
+ .flag = FREQ_MASK,
+ },
+ { /* used by p4080, p5040 */
+ .freq_mask = {0},
+ .flag = 0,
+ },
+};
+
+/*
+ * the minimum allowed core frequency, in Hz
+ * for chassis v1.0, >= platform frequency
+ * for chassis v2.0, >= platform frequency / 2
+ */
+static u32 min_cpufreq;
+static const u32 *fmask;
+
+/* serialize frequency changes */
+static DEFINE_MUTEX(cpufreq_lock);
+static DEFINE_PER_CPU(struct cpu_data *, cpu_data);
+
+/* cpumask in a cluster */
+static DEFINE_PER_CPU(cpumask_var_t, cpu_mask);
+
+#ifndef CONFIG_SMP
+static inline const struct cpumask *cpu_core_mask(int cpu)
+{
+ return cpumask_of(0);
+}
+#endif
+
+static unsigned int corenet_cpufreq_get_speed(unsigned int cpu)
+{
+ struct cpu_data *data = per_cpu(cpu_data, cpu);
+
+ return clk_get_rate(data->clk) / 1000;
+}
+
+/* reduce the duplicated frequencies in frequency table */
+static void freq_table_redup(struct cpufreq_frequency_table *freq_table,
+ int count)
+{
+ int i, j;
+
+ for (i = 1; i < count; i++) {
+ for (j = 0; j < i; j++) {
+ if (freq_table[j].frequency == CPUFREQ_ENTRY_INVALID ||
+ freq_table[j].frequency !=
+ freq_table[i].frequency)
+ continue;
+
+ freq_table[i].frequency = CPUFREQ_ENTRY_INVALID;
+ break;
+ }
+ }
+}
+
+/* sort the frequencies in frequency table in descenting order */
+static void freq_table_sort(struct cpufreq_frequency_table *freq_table,
+ int count)
+{
+ int i, j, ind;
+ unsigned int freq, max_freq;
+ struct cpufreq_frequency_table table;
+ for (i = 0; i < count - 1; i++) {
+ max_freq = freq_table[i].frequency;
+ ind = i;
+ for (j = i + 1; j < count; j++) {
+ freq = freq_table[j].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID ||
+ freq <= max_freq)
+ continue;
+ ind = j;
+ max_freq = freq;
+ }
+
+ if (ind != i) {
+ /* exchange the frequencies */
+ table.driver_data = freq_table[i].driver_data;
+ table.frequency = freq_table[i].frequency;
+ freq_table[i].driver_data = freq_table[ind].driver_data;
+ freq_table[i].frequency = freq_table[ind].frequency;
+ freq_table[ind].driver_data = table.driver_data;
+ freq_table[ind].frequency = table.frequency;
+ }
+ }
+}
+
+static int corenet_cpufreq_cpu_init(struct cpufreq_policy *policy)
+{
+ struct device_node *np;
+ int i, count, ret;
+ u32 freq, mask;
+ struct clk *clk;
+ struct cpufreq_frequency_table *table;
+ struct cpu_data *data;
+ unsigned int cpu = policy->cpu;
+
+ np = of_get_cpu_node(cpu, NULL);
+ if (!np)
+ return -ENODEV;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ pr_err("%s: no memory\n", __func__);
+ goto err_np;
+ }
+
+ data->clk = of_clk_get(np, 0);
+ if (IS_ERR(data->clk)) {
+ pr_err("%s: no clock information\n", __func__);
+ goto err_nomem2;
+ }
+
+ data->parent = of_parse_phandle(np, "clocks", 0);
+ if (!data->parent) {
+ pr_err("%s: could not get clock information\n", __func__);
+ goto err_nomem2;
+ }
+
+ count = of_property_count_strings(data->parent, "clock-names");
+ table = kcalloc(count + 1, sizeof(*table), GFP_KERNEL);
+ if (!table) {
+ pr_err("%s: no memory\n", __func__);
+ goto err_node;
+ }
+
+ if (fmask)
+ mask = fmask[get_hard_smp_processor_id(cpu)];
+ else
+ mask = 0x0;
+
+ for (i = 0; i < count; i++) {
+ clk = of_clk_get(data->parent, i);
+ freq = clk_get_rate(clk);
+ /*
+ * the clock is valid if its frequency is not masked
+ * and large than minimum allowed frequency.
+ */
+ if (freq < min_cpufreq || (mask & (1 << i)))
+ table[i].frequency = CPUFREQ_ENTRY_INVALID;
+ else
+ table[i].frequency = freq / 1000;
+ table[i].driver_data = i;
+ }
+ freq_table_redup(table, count);
+ freq_table_sort(table, count);
+ table[i].frequency = CPUFREQ_TABLE_END;
+
+ /* set the min and max frequency properly */
+ ret = cpufreq_frequency_table_cpuinfo(policy, table);
+ if (ret) {
+ pr_err("invalid frequency table: %d\n", ret);
+ goto err_nomem1;
+ }
+
+ data->table = table;
+ per_cpu(cpu_data, cpu) = data;
+
+ /* update ->cpus if we have cluster, no harm if not */
+ cpumask_copy(policy->cpus, per_cpu(cpu_mask, cpu));
+ for_each_cpu(i, per_cpu(cpu_mask, cpu))
+ per_cpu(cpu_data, i) = data;
+
+ policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
+ policy->cur = corenet_cpufreq_get_speed(policy->cpu);
+
+ cpufreq_frequency_table_get_attr(table, cpu);
+ of_node_put(np);
+
+ return 0;
+
+err_nomem1:
+ kfree(table);
+err_node:
+ of_node_put(data->parent);
+err_nomem2:
+ per_cpu(cpu_data, cpu) = NULL;
+ kfree(data);
+err_np:
+ of_node_put(np);
+
+ return -ENODEV;
+}
+
+static int __exit corenet_cpufreq_cpu_exit(struct cpufreq_policy *policy)
+{
+ struct cpu_data *data = per_cpu(cpu_data, policy->cpu);
+ unsigned int cpu;
+
+ cpufreq_frequency_table_put_attr(policy->cpu);
+ of_node_put(data->parent);
+ kfree(data->table);
+ kfree(data);
+
+ for_each_cpu(cpu, per_cpu(cpu_mask, policy->cpu))
+ per_cpu(cpu_data, cpu) = NULL;
+
+ return 0;
+}
+
+static int corenet_cpufreq_verify(struct cpufreq_policy *policy)
+{
+ struct cpufreq_frequency_table *table =
+ per_cpu(cpu_data, policy->cpu)->table;
+
+ return cpufreq_frequency_table_verify(policy, table);
+}
+
+static int corenet_cpufreq_target(struct cpufreq_policy *policy,
+ unsigned int target_freq, unsigned int relation)
+{
+ struct cpufreq_freqs freqs;
+ unsigned int new;
+ struct clk *parent;
+ int ret;
+ struct cpu_data *data = per_cpu(cpu_data, policy->cpu);
+
+ cpufreq_frequency_table_target(policy, data->table,
+ target_freq, relation, &new);
+
+ if (policy->cur == data->table[new].frequency)
+ return 0;
+
+ freqs.old = policy->cur;
+ freqs.new = data->table[new].frequency;
+
+ mutex_lock(&cpufreq_lock);
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+
+ parent = of_clk_get(data->parent, data->table[new].driver_data);
+ ret = clk_set_parent(data->clk, parent);
+ if (ret)
+ freqs.new = freqs.old;
+
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+ mutex_unlock(&cpufreq_lock);
+
+ return ret;
+}
+
+static struct freq_attr *corenet_cpufreq_attr[] = {
+ &cpufreq_freq_attr_scaling_available_freqs,
+ NULL,
+};
+
+static struct cpufreq_driver ppc_corenet_cpufreq_driver = {
+ .name = "ppc_cpufreq",
+ .owner = THIS_MODULE,
+ .flags = CPUFREQ_CONST_LOOPS,
+ .init = corenet_cpufreq_cpu_init,
+ .exit = __exit_p(corenet_cpufreq_cpu_exit),
+ .verify = corenet_cpufreq_verify,
+ .target = corenet_cpufreq_target,
+ .get = corenet_cpufreq_get_speed,
+ .attr = corenet_cpufreq_attr,
+};
+
+static const struct of_device_id node_matches[] __initdata = {
+ { .compatible = "fsl,p2041-clockgen", .data = &sdata[0], },
+ { .compatible = "fsl,p3041-clockgen", .data = &sdata[0], },
+ { .compatible = "fsl,p5020-clockgen", .data = &sdata[1], },
+ { .compatible = "fsl,p4080-clockgen", .data = &sdata[2], },
+ { .compatible = "fsl,p5040-clockgen", .data = &sdata[2], },
+ { .compatible = "fsl,qoriq-clockgen-2.0", },
+ {}
+};
+
+static int __init ppc_corenet_cpufreq_init(void)
+{
+ int ret;
+ struct device_node *np;
+ const struct of_device_id *match;
+ const struct soc_data *data;
+ unsigned int cpu;
+
+ np = of_find_matching_node(NULL, node_matches);
+ if (!np)
+ return -ENODEV;
+
+ for_each_possible_cpu(cpu) {
+ if (!alloc_cpumask_var(&per_cpu(cpu_mask, cpu), GFP_KERNEL))
+ goto err_mask;
+ cpumask_copy(per_cpu(cpu_mask, cpu), cpu_core_mask(cpu));
+ }
+
+ match = of_match_node(node_matches, np);
+ data = match->data;
+ if (data) {
+ if (data->flag)
+ fmask = data->freq_mask;
+ min_cpufreq = fsl_get_sys_freq();
+ } else {
+ min_cpufreq = fsl_get_sys_freq() / 2;
+ }
+
+ of_node_put(np);
+
+ ret = cpufreq_register_driver(&ppc_corenet_cpufreq_driver);
+ if (!ret)
+ pr_info("Freescale PowerPC corenet CPU frequency scaling driver\n");
+
+ return ret;
+
+err_mask:
+ for_each_possible_cpu(cpu)
+ free_cpumask_var(per_cpu(cpu_mask, cpu));
+
+ return -ENOMEM;
+}
+module_init(ppc_corenet_cpufreq_init);
+
+static void __exit ppc_corenet_cpufreq_exit(void)
+{
+ unsigned int cpu;
+
+ for_each_possible_cpu(cpu)
+ free_cpumask_var(per_cpu(cpu_mask, cpu));
+
+ cpufreq_unregister_driver(&ppc_corenet_cpufreq_driver);
+}
+module_exit(ppc_corenet_cpufreq_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Tang Yuantian <Yuantian.Tang@freescale.com>");
+MODULE_DESCRIPTION("cpufreq driver for Freescale e500mc series SoCs");
/* initialize frequency table */
for (i=0; cbe_freqs[i].frequency!=CPUFREQ_TABLE_END; i++) {
- cbe_freqs[i].frequency = max_freq / cbe_freqs[i].index;
+ cbe_freqs[i].frequency = max_freq / cbe_freqs[i].driver_data;
pr_debug("%d: %d\n", i, cbe_freqs[i].frequency);
}
"1/%d of max frequency\n",
policy->cpu,
cbe_freqs[cbe_pmode_new].frequency,
- cbe_freqs[cbe_pmode_new].index);
+ cbe_freqs[cbe_pmode_new].driver_data);
rc = set_pmode(policy->cpu, cbe_pmode_new);
/* Generate pxa25x the run cpufreq_frequency_table struct */
for (i = 0; i < NUM_PXA25x_RUN_FREQS; i++) {
pxa255_run_freq_table[i].frequency = pxa255_run_freqs[i].khz;
- pxa255_run_freq_table[i].index = i;
+ pxa255_run_freq_table[i].driver_data = i;
}
pxa255_run_freq_table[i].frequency = CPUFREQ_TABLE_END;
for (i = 0; i < NUM_PXA25x_TURBO_FREQS; i++) {
pxa255_turbo_freq_table[i].frequency =
pxa255_turbo_freqs[i].khz;
- pxa255_turbo_freq_table[i].index = i;
+ pxa255_turbo_freq_table[i].driver_data = i;
}
pxa255_turbo_freq_table[i].frequency = CPUFREQ_TABLE_END;
if (freq > pxa27x_maxfreq)
break;
pxa27x_freq_table[i].frequency = freq;
- pxa27x_freq_table[i].index = i;
+ pxa27x_freq_table[i].driver_data = i;
}
- pxa27x_freq_table[i].index = i;
+ pxa27x_freq_table[i].driver_data = i;
pxa27x_freq_table[i].frequency = CPUFREQ_TABLE_END;
/*
return -ENOMEM;
for (i = 0; i < num; i++) {
- table[i].index = i;
+ table[i].driver_data = i;
table[i].frequency = freqs[i].cpufreq_mhz * 1000;
}
- table[num].index = i;
+ table[num].driver_data = i;
table[num].frequency = CPUFREQ_TABLE_END;
pxa3xx_freqs = freqs;
if (ret != 0)
goto out;
- idx = s3c_freq->freq_table[i].index;
+ idx = s3c_freq->freq_table[i].driver_data;
if (idx == SOURCE_HCLK)
to_dvs = 1;
if (freq->frequency == CPUFREQ_ENTRY_INVALID)
continue;
- dvfs = &s3c2416_dvfs_table[freq->index];
+ dvfs = &s3c2416_dvfs_table[freq->driver_data];
found = 0;
/* Check only the min-voltage, more is always ok on S3C2416 */
freq = s3c_freq->freq_table;
while (freq->frequency != CPUFREQ_TABLE_END) {
/* special handling for dvs mode */
- if (freq->index == 0) {
+ if (freq->driver_data == 0) {
if (!s3c_freq->hclk) {
pr_debug("cpufreq: %dkHz unsupported as it would need unavailable dvs mode\n",
freq->frequency);
freqs.old = clk_get_rate(armclk) / 1000;
freqs.new = s3c64xx_freq_table[i].frequency;
freqs.flags = 0;
- dvfs = &s3c64xx_dvfs_table[s3c64xx_freq_table[i].index];
+ dvfs = &s3c64xx_dvfs_table[s3c64xx_freq_table[i].driver_data];
if (freqs.old == freqs.new)
return 0;
if (ret != 0) {
pr_err("Failed to set VDDARM for %dkHz: %d\n",
freqs.new, ret);
- goto err;
+ freqs.new = freqs.old;
+ goto post_notify;
}
}
#endif
if (ret < 0) {
pr_err("Failed to set rate %dkHz: %d\n",
freqs.new, ret);
- goto err;
+ freqs.new = freqs.old;
}
+post_notify:
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+ if (ret)
+ goto err;
#ifdef CONFIG_REGULATOR
if (vddarm && freqs.new < freqs.old) {
local_irq_disable();
clockspeed_reg = *cpuctl & ~0x03;
- *cpuctl = clockspeed_reg | sc520_freq_table[state].index;
+ *cpuctl = clockspeed_reg | sc520_freq_table[state].driver_data;
local_irq_enable();
struct cpufreq_frequency_table *table =
&us2e_freq_table[cpu].table[0];
- table[0].index = 0;
+ table[0].driver_data = 0;
table[0].frequency = clock_tick / 1;
- table[1].index = 1;
+ table[1].driver_data = 1;
table[1].frequency = clock_tick / 2;
- table[2].index = 2;
+ table[2].driver_data = 2;
table[2].frequency = clock_tick / 4;
- table[2].index = 3;
+ table[2].driver_data = 3;
table[2].frequency = clock_tick / 6;
- table[2].index = 4;
+ table[2].driver_data = 4;
table[2].frequency = clock_tick / 8;
- table[2].index = 5;
+ table[2].driver_data = 5;
table[3].frequency = CPUFREQ_TABLE_END;
policy->cpuinfo.transition_latency = 0;
struct cpufreq_frequency_table *table =
&us3_freq_table[cpu].table[0];
- table[0].index = 0;
+ table[0].driver_data = 0;
table[0].frequency = clock_tick / 1;
- table[1].index = 1;
+ table[1].driver_data = 1;
table[1].frequency = clock_tick / 2;
- table[2].index = 2;
+ table[2].driver_data = 2;
table[2].frequency = clock_tick / 32;
- table[3].index = 0;
+ table[3].driver_data = 0;
table[3].frequency = CPUFREQ_TABLE_END;
policy->cpuinfo.transition_latency = 0;
}
for (i = 0; i < cnt; i++) {
- freq_tbl[i].index = i;
+ freq_tbl[i].driver_data = i;
freq_tbl[i].frequency = be32_to_cpup(val++);
}
- freq_tbl[i].index = i;
+ freq_tbl[i].driver_data = i;
freq_tbl[i].frequency = CPUFREQ_TABLE_END;
spear_cpufreq.freq_tbl = freq_tbl;
/* Computes the correct form for IA32_PERF_CTL MSR for a particular
frequency/voltage operating point; frequency in MHz, volts in mV.
- This is stored as "index" in the structure. */
+ This is stored as "driver_data" in the structure. */
#define OP(mhz, mv) \
{ \
.frequency = (mhz) * 1000, \
- .index = (((mhz)/100) << 8) | ((mv - 700) / 16) \
+ .driver_data = (((mhz)/100) << 8) | ((mv - 700) / 16) \
}
/*
per_cpu(centrino_model, cpu)->op_points[i].frequency
!= CPUFREQ_TABLE_END;
i++) {
- if (msr == per_cpu(centrino_model, cpu)->op_points[i].index)
+ if (msr == per_cpu(centrino_model, cpu)->op_points[i].driver_data)
return per_cpu(centrino_model, cpu)->
op_points[i].frequency;
}
break;
}
- msr = per_cpu(centrino_model, cpu)->op_points[newstate].index;
+ msr = per_cpu(centrino_model, cpu)->op_points[newstate].driver_data;
if (first_cpu) {
rdmsr_on_cpu(good_cpu, MSR_IA32_PERF_CTL, &oldmsr, &h);
#include <linux/io.h>
#include <linux/suspend.h>
-/* Frequency table index must be sequential starting at 0 */
static struct cpufreq_frequency_table freq_table[] = {
- { 0, 216000 },
- { 1, 312000 },
- { 2, 456000 },
- { 3, 608000 },
- { 4, 760000 },
- { 5, 816000 },
- { 6, 912000 },
- { 7, 1000000 },
- { 8, CPUFREQ_TABLE_END },
+ { .frequency = 216000 },
+ { .frequency = 312000 },
+ { .frequency = 456000 },
+ { .frequency = 608000 },
+ { .frequency = 760000 },
+ { .frequency = 816000 },
+ { .frequency = 912000 },
+ { .frequency = 1000000 },
+ { .frequency = CPUFREQ_TABLE_END },
};
#define NUM_CPUS 2
if (ret) {
pr_err("cpu-tegra: Failed to set cpu frequency to %d kHz\n",
freqs.new);
- return ret;
+ freqs.new = freqs.old;
}
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
- return 0;
+ return ret;
}
static unsigned long tegra_cpu_highest_speed(void)
/* CPU FREQ table, may be changed due to if MAX_OPP is supported. */
static struct cpufreq_frequency_table db8500_cpufreq_table[] = {
- { .frequency = 200000, .index = ARM_EXTCLK,},
- { .frequency = 400000, .index = ARM_50_OPP,},
- { .frequency = 800000, .index = ARM_100_OPP,},
+ { .frequency = 200000, .driver_data = ARM_EXTCLK,},
+ { .frequency = 400000, .driver_data = ARM_50_OPP,},
+ { .frequency = 800000, .driver_data = ARM_100_OPP,},
{ .frequency = CPUFREQ_TABLE_END,}, /* To be used for MAX_OPP. */
{ .frequency = CPUFREQ_TABLE_END,},
};
return -EINVAL;
/* Set the new arm opp. */
- return db8500_prcmu_set_arm_opp(db8500_cpufreq_table[i].index);
+ return db8500_prcmu_set_arm_opp(db8500_cpufreq_table[i].driver_data);
}
static int set_plldsi_rate(unsigned long rate)
{
if (prcmu_has_arm_maxopp()) {
db8500_cpufreq_table[3].frequency = 1000000;
- db8500_cpufreq_table[3].index = ARM_MAX_OPP;
+ db8500_cpufreq_table[3].driver_data = ARM_MAX_OPP;
}
}
else
freq = clk->parent->rate * mult / div;
- freq_table[i].index = i;
+ freq_table[i].driver_data = i;
freq_table[i].frequency = freq;
}
/* Termination entry */
- freq_table[i].index = i;
+ freq_table[i].driver_data = i;
freq_table[i].frequency = CPUFREQ_TABLE_END;
}
/*
- * linux/include/linux/cpufreq.h
+ * linux/include/linux/cpufreq.h
*
- * Copyright (C) 2001 Russell King
- * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
+ * Copyright (C) 2001 Russell King
+ * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
/* Print length for names. Extra 1 space for accomodating '\n' in prints */
#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
-
/*********************************************************************
* CPUFREQ NOTIFIER INTERFACE *
*********************************************************************/
/* /sys/devices/system/cpu/cpufreq: entry point for global variables */
extern struct kobject *cpufreq_global_kobject;
+int cpufreq_get_global_kobject(void);
+void cpufreq_put_global_kobject(void);
+int cpufreq_sysfs_create_file(const struct attribute *attr);
+void cpufreq_sysfs_remove_file(const struct attribute *attr);
#define CPUFREQ_ETERNAL (-1)
struct cpufreq_cpuinfo {
unsigned int policy; /* see above */
struct cpufreq_governor *governor; /* see below */
void *governor_data;
+ bool governor_enabled; /* governor start/stop flag */
struct work_struct update; /* if update_policy() needs to be
* called, but you're in IRQ context */
u8 flags; /* flags of cpufreq_driver, see below. */
};
-
/**
- * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch safe)
+ * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
+ * safe)
* @old: old value
* @div: divisor
* @mult: multiplier
*
*
- * new = old * mult / div
+ * new = old * mult / div
*/
-static inline unsigned long cpufreq_scale(unsigned long old, u_int div, u_int mult)
+static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
+ u_int mult)
{
#if BITS_PER_LONG == 32
unsigned int target_freq,
unsigned int relation);
-
extern int __cpufreq_driver_getavg(struct cpufreq_policy *policy,
unsigned int cpu);
int cpufreq_register_governor(struct cpufreq_governor *governor);
void cpufreq_unregister_governor(struct cpufreq_governor *governor);
-
/*********************************************************************
* CPUFREQ DRIVER INTERFACE *
*********************************************************************/
struct freq_attr;
struct cpufreq_driver {
- struct module *owner;
+ struct module *owner;
char name[CPUFREQ_NAME_LEN];
u8 flags;
/*
int cpufreq_register_driver(struct cpufreq_driver *driver_data);
int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
-
void cpufreq_notify_transition(struct cpufreq_policy *policy,
struct cpufreq_freqs *freqs, unsigned int state);
-static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, unsigned int min, unsigned int max)
+static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
+ unsigned int min, unsigned int max)
{
if (policy->min < min)
policy->min = min;
/*********************************************************************
* CPUFREQ 2.6. INTERFACE *
*********************************************************************/
+u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
int cpufreq_update_policy(unsigned int cpu);
bool have_governor_per_policy(void);
+struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
#ifdef CONFIG_CPU_FREQ
-/* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it */
+/*
+ * query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it
+ */
unsigned int cpufreq_get(unsigned int cpu);
#else
static inline unsigned int cpufreq_get(unsigned int cpu)
}
#endif
-/* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */
+/*
+ * query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it
+ */
#ifdef CONFIG_CPU_FREQ
unsigned int cpufreq_quick_get(unsigned int cpu);
unsigned int cpufreq_quick_get_max(unsigned int cpu);
}
#endif
-
/*********************************************************************
* CPUFREQ DEFAULT GOVERNOR *
*********************************************************************/
-
/*
- Performance governor is fallback governor if any other gov failed to
- auto load due latency restrictions
-*/
+ * Performance governor is fallback governor if any other gov failed to auto
+ * load due latency restrictions
+ */
#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
extern struct cpufreq_governor cpufreq_gov_performance;
#endif
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative)
#endif
-
/*********************************************************************
* FREQUENCY TABLE HELPERS *
*********************************************************************/
#define CPUFREQ_TABLE_END ~1
struct cpufreq_frequency_table {
- unsigned int index; /* any */
+ unsigned int driver_data; /* driver specific data, not used by core */
unsigned int frequency; /* kHz - doesn't need to be in ascending
* order */
};
projects / linux-imx.git / commitdiff