Merge tag 'qcom-soc-for-3.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git...

[pandora-kernel.git] / drivers / net / phy / mdio-gpio.c

diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c
index e701433..9c4defd 100644 (file)
--- a/drivers/net/phy/mdio-gpio.c
+++ b/drivers/net/phy/mdio-gpio.c
@@ -32,29 +32,39 @@
 
 struct mdio_gpio_info {
        struct mdiobb_ctrl ctrl;
-       int mdc, mdio;
+       int mdc, mdio, mdo;
+       int mdc_active_low, mdio_active_low, mdo_active_low;
 };
 
 static void *mdio_gpio_of_get_data(struct platform_device *pdev)
 {
        struct device_node *np = pdev->dev.of_node;
        struct mdio_gpio_platform_data *pdata;
+       enum of_gpio_flags flags;
        int ret;
 
        pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
        if (!pdata)
                return NULL;
 
-       ret = of_get_gpio(np, 0);
+       ret = of_get_gpio_flags(np, 0, &flags);
        if (ret < 0)
                return NULL;
 
        pdata->mdc = ret;
+       pdata->mdc_active_low = flags & OF_GPIO_ACTIVE_LOW;
 
-       ret = of_get_gpio(np, 1);
+       ret = of_get_gpio_flags(np, 1, &flags);
        if (ret < 0)
                return NULL;
        pdata->mdio = ret;
+       pdata->mdio_active_low = flags & OF_GPIO_ACTIVE_LOW;
+
+       ret = of_get_gpio_flags(np, 2, &flags);
+       if (ret > 0) {
+               pdata->mdo = ret;
+               pdata->mdo_active_low = flags & OF_GPIO_ACTIVE_LOW;
+       }
 
        return pdata;
 }
@@ -64,8 +74,19 @@ static void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
        struct mdio_gpio_info *bitbang =
                container_of(ctrl, struct mdio_gpio_info, ctrl);
 
+       if (bitbang->mdo) {
+               /* Separate output pin. Always set its value to high
+                * when changing direction. If direction is input,
+                * assume the pin serves as pull-up. If direction is
+                * output, the default value is high.
+                */
+               gpio_set_value(bitbang->mdo, 1 ^ bitbang->mdo_active_low);
+               return;
+       }
+
        if (dir)
-               gpio_direction_output(bitbang->mdio, 1);
+               gpio_direction_output(bitbang->mdio,
+                                     1 ^ bitbang->mdio_active_low);
        else
                gpio_direction_input(bitbang->mdio);
 }
@@ -75,7 +96,7 @@ static int mdio_get(struct mdiobb_ctrl *ctrl)
        struct mdio_gpio_info *bitbang =
                container_of(ctrl, struct mdio_gpio_info, ctrl);
 
-       return gpio_get_value(bitbang->mdio);
+       return gpio_get_value(bitbang->mdio) ^ bitbang->mdio_active_low;
 }
 
 static void mdio_set(struct mdiobb_ctrl *ctrl, int what)
@@ -83,7 +104,10 @@ static void mdio_set(struct mdiobb_ctrl *ctrl, int what)
        struct mdio_gpio_info *bitbang =
                container_of(ctrl, struct mdio_gpio_info, ctrl);
 
-       gpio_set_value(bitbang->mdio, what);
+       if (bitbang->mdo)
+               gpio_set_value(bitbang->mdo, what ^ bitbang->mdo_active_low);
+       else
+               gpio_set_value(bitbang->mdio, what ^ bitbang->mdio_active_low);
 }
 
 static void mdc_set(struct mdiobb_ctrl *ctrl, int what)
@@ -91,7 +115,7 @@ static void mdc_set(struct mdiobb_ctrl *ctrl, int what)
        struct mdio_gpio_info *bitbang =
                container_of(ctrl, struct mdio_gpio_info, ctrl);
 
-       gpio_set_value(bitbang->mdc, what);
+       gpio_set_value(bitbang->mdc, what ^ bitbang->mdc_active_low);
 }
 
 static struct mdiobb_ops mdio_gpio_ops = {
@@ -110,18 +134,22 @@ static struct mii_bus *mdio_gpio_bus_init(struct device *dev,
        struct mdio_gpio_info *bitbang;
        int i;
 
-       bitbang = kzalloc(sizeof(*bitbang), GFP_KERNEL);
+       bitbang = devm_kzalloc(dev, sizeof(*bitbang), GFP_KERNEL);
        if (!bitbang)
                goto out;
 
        bitbang->ctrl.ops = &mdio_gpio_ops;
        bitbang->ctrl.reset = pdata->reset;
        bitbang->mdc = pdata->mdc;
+       bitbang->mdc_active_low = pdata->mdc_active_low;
        bitbang->mdio = pdata->mdio;
+       bitbang->mdio_active_low = pdata->mdio_active_low;
+       bitbang->mdo = pdata->mdo;
+       bitbang->mdo_active_low = pdata->mdo_active_low;
 
        new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
        if (!new_bus)
-               goto out_free_bitbang;
+               goto out;
 
        new_bus->name = "GPIO Bitbanged MDIO",
 
@@ -138,11 +166,18 @@ static struct mii_bus *mdio_gpio_bus_init(struct device *dev,
 
        snprintf(new_bus->id, MII_BUS_ID_SIZE, "gpio-%x", bus_id);
 
-       if (gpio_request(bitbang->mdc, "mdc"))
+       if (devm_gpio_request(dev, bitbang->mdc, "mdc"))
+               goto out_free_bus;
+
+       if (devm_gpio_request(dev, bitbang->mdio, "mdio"))
                goto out_free_bus;
 
-       if (gpio_request(bitbang->mdio, "mdio"))
-               goto out_free_mdc;
+       if (bitbang->mdo) {
+               if (devm_gpio_request(dev, bitbang->mdo, "mdo"))
+                       goto out_free_bus;
+               gpio_direction_output(bitbang->mdo, 1);
+               gpio_direction_input(bitbang->mdio);
+       }
 
        gpio_direction_output(bitbang->mdc, 0);
 
@@ -150,12 +185,8 @@ static struct mii_bus *mdio_gpio_bus_init(struct device *dev,
 
        return new_bus;
 
-out_free_mdc:
-       gpio_free(bitbang->mdc);
 out_free_bus:
        free_mdio_bitbang(new_bus);
-out_free_bitbang:
-       kfree(bitbang);
 out:
        return NULL;
 }
@@ -163,13 +194,8 @@ out:
 static void mdio_gpio_bus_deinit(struct device *dev)
 {
        struct mii_bus *bus = dev_get_drvdata(dev);
-       struct mdio_gpio_info *bitbang = bus->priv;
 
-       dev_set_drvdata(dev, NULL);
-       gpio_free(bitbang->mdio);
-       gpio_free(bitbang->mdc);
        free_mdio_bitbang(bus);
-       kfree(bitbang);
 }
 
 static void mdio_gpio_bus_destroy(struct device *dev)