gpio: xilinx: Add reset support

This patch updates xlate api and gpio cells value to
provide reset support for other IP's using axi gpio.

Signed-off-by: Swapna Manupati <swapnam@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c
index d7526bd1c6137337375adbbd1231da77d9a364be..9ecd7a78fd0dbe36cf56267541e131ab02b0bc3e 100644 (file)
--- a/drivers/gpio/gpio-xilinx.c
+++ b/drivers/gpio/gpio-xilinx.c
@@ -265,6 +265,8 @@ static int xgpio_xlate(struct gpio_chip *gc,
        struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
        struct xgpio_instance *chip = container_of(mm_gc, struct xgpio_instance,
                                                   mmchip);
+       if (gc->of_gpio_n_cells == 3 && flags)
+               *flags = gpiospec->args[2];
 
        if (gpiospec->args[1] == chip->offset)
                return gpiospec->args[0];
@@ -583,6 +585,7 @@ static int xgpio_of_probe(struct platform_device *pdev)
        int status = 0;
        const u32 *tree_info;
        u32 ngpio;
+       u32 cells = 2;
 
        chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
        if (!chip)
@@ -597,6 +600,9 @@ static int xgpio_of_probe(struct platform_device *pdev)
        /* Update GPIO direction shadow register with default value */
        of_property_read_u32(np, "xlnx,tri-default", &chip->gpio_dir);
 
+       /* Update cells with gpio-cells value */
+       of_property_read_u32(np, "#gpio-cells", &cells);
+
        /*
         * Check device node and parent device node for device width
         * and assume default width of 32
@@ -610,7 +616,7 @@ static int xgpio_of_probe(struct platform_device *pdev)
        chip->mmchip.gc.parent = &pdev->dev;
        chip->mmchip.gc.owner = THIS_MODULE;
        chip->mmchip.gc.of_xlate = xgpio_xlate;
-       chip->mmchip.gc.of_gpio_n_cells = 2;
+       chip->mmchip.gc.of_gpio_n_cells = cells;
        chip->mmchip.gc.direction_input = xgpio_dir_in;
        chip->mmchip.gc.direction_output = xgpio_dir_out;
        chip->mmchip.gc.get = xgpio_get;
@@ -699,7 +705,7 @@ static int xgpio_of_probe(struct platform_device *pdev)
                chip->mmchip.gc.parent = &pdev->dev;
                chip->mmchip.gc.owner = THIS_MODULE;
                chip->mmchip.gc.of_xlate = xgpio_xlate;
-               chip->mmchip.gc.of_gpio_n_cells = 2;
+               chip->mmchip.gc.of_gpio_n_cells = cells;
                chip->mmchip.gc.direction_input = xgpio_dir_in;
                chip->mmchip.gc.direction_output = xgpio_dir_out;
                chip->mmchip.gc.get = xgpio_get;