gpiolib: of: add quirk for phy reset polarity for Freescale Ethernet

Bindings for Freescale Fast Ethernet Controller use a separate
property "phy-reset-active-high" to specify polarity of its phy
gpio line. To allow converting the driver to gpiod API we need
to add this quirk to gpiolib.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 6faf0dc..c2a55ff 100644 (file)
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -231,6 +231,33 @@ static void of_gpio_flags_quirks(const struct device_node *np,
            !strcmp(propname, "snps,reset-gpio") &&
            of_property_read_bool(np, "snps,reset-active-low"))
                *flags |= OF_GPIO_ACTIVE_LOW;
+
+       /*
+        * Freescale Fast Ethernet Controller uses a separate property to
+        * describe polarity of the phy reset line.
+        */
+       if (IS_ENABLED(CONFIG_FEC)) {
+               static const char * const fec_devices[] = {
+                       "fsl,imx25-fec",
+                       "fsl,imx27-fec",
+                       "fsl,imx28-fec",
+                       "fsl,imx6q-fec",
+                       "fsl,mvf600-fec",
+                       "fsl,imx6sx-fec",
+                       "fsl,imx6ul-fec",
+                       "fsl,imx8mq-fec",
+                       "fsl,imx8qm-fec",
+                       "fsl,s32v234-fec",
+                       NULL
+               };
+
+               if (!strcmp(propname, "phy-reset-gpios") &&
+                   of_device_compatible_match(np, fec_devices)) {
+                       bool active_high = of_property_read_bool(np,
+                                               "phy-reset-active-high");
+                       of_gpio_quirk_polarity(np, active_high, flags);
+               }
+       }
 }
 
 /**