dvfs: tegra: Update error codes.

- Returned -ENODATA error from voltage predict interfaces called on
  clock with no DVFS (instead of 0 mV).

- Returned -ENODATA error from DVFS voltage set interfaces called on
  clock with no DVFS (instead of -EINVAL).

- Returned -EINVAL error from voltage and frequency predict/get
  interfaces called on clock with alternative DVFS frequencies
  (instead of -ENOSYS).

Change-Id: I32d79e106825963b9bfa78215f1d974c7b681a60
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: http://git-master/r/723819
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>

diff --git a/drivers/platform/tegra/dvfs.c b/drivers/platform/tegra/dvfs.c
index e769283253074a9ded02c0d1f6d919bf7dd7fa79..bb065902d55de81ed0816730fd1437706c8b614c 100644 (file)
--- a/drivers/platform/tegra/dvfs.c
+++ b/drivers/platform/tegra/dvfs.c
@@ -1114,7 +1114,7 @@ static int predict_millivolts(struct clk *c, const int *millivolts,
         * alternative limits initialized.
         */
        if (c->dvfs->alt_freqs)
-               return -ENOSYS;
+               return -EINVAL;
 
        return predict_non_alt_millivolts(c, millivolts, rate);
 }
@@ -1140,7 +1140,7 @@ static unsigned long predict_hz_at_mv_max_tfloor(struct clk *c, int mv)
         * initialized.
         */
        if (c->dvfs->alt_freqs)
-               return -ENOSYS;
+               return -EINVAL;
 
        for (i = 0; i < c->dvfs->num_freqs; i++) {
                rate = c->dvfs->freqs[i];
@@ -1191,7 +1191,7 @@ int tegra_dvfs_predict_mv_at_hz_no_tfloor(struct clk *c, unsigned long rate)
        const int *millivolts;
 
        if (!c->dvfs)
-               return 0;
+               return -ENODATA;
 
        if ((c->dvfs->dvfs_rail == tegra_gpu_rail) ||
            (c->dvfs->dvfs_rail == tegra_cpu_rail)) {
@@ -1223,7 +1223,7 @@ int tegra_dvfs_predict_mv_at_hz_cur_tfloor(struct clk *c, unsigned long rate)
        struct dvfs_rail *rail;
 
        if (!c->dvfs)
-               return 0;
+               return -ENODATA;
 
        rail = c->dvfs->dvfs_rail;
 
@@ -1257,7 +1257,7 @@ static int dvfs_predict_mv_at_hz_max_tfloor(struct clk *c, unsigned long rate)
        const int *millivolts;
 
        if (!c->dvfs)
-               return 0;
+               return -ENODATA;
 
        millivolts = dvfs_get_peak_millivolts(c->dvfs, rate);
        mv = predict_non_alt_millivolts(c, millivolts, rate);
@@ -1342,7 +1342,7 @@ int tegra_dvfs_set_rate(struct clk *c, unsigned long rate)
        bool suspended;
 
        if (!c->dvfs)
-               return -EINVAL;
+               return -ENODATA;
 
        suspended = timekeeping_suspended && c->dvfs->dvfs_rail->suspended;
        if (suspended) {
@@ -1365,10 +1365,10 @@ EXPORT_SYMBOL(tegra_dvfs_set_rate);
 int tegra_dvfs_get_freqs(struct clk *c, unsigned long **freqs, int *num_freqs)
 {
        if (!c->dvfs)
-               return -ENOSYS;
+               return -ENODATA;
 
        if (c->dvfs->alt_freqs)
-               return -ENOSYS;
+               return -EINVAL;
 
        *num_freqs = c->dvfs->num_freqs;
        *freqs = c->dvfs->freqs;