net: phy: mdio-gpio: Swap to using gpio descriptors

This simplifies the code, removing the need to handle active low
flags, etc.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/mdio-gpio.c

@@ -35,35 +35,25 @@ struct mdio_gpio_info {
 	struct gpio_desc *mdc, *mdio, *mdo;
 };
 
-static void *mdio_gpio_of_get_data(struct platform_device *pdev)
+static void *mdio_gpio_of_get_data(struct device *dev)
 {
-	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);
+	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
 		return NULL;
 
-	ret = of_get_gpio_flags(np, 0, &flags);
-	if (ret < 0)
-		return NULL;
+	pdata->mdc = devm_gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW);
+	if (IS_ERR(pdata->mdc))
+		return ERR_CAST(pdata->mdc);
 
-	pdata->mdc = ret;
-	pdata->mdc_active_low = flags & OF_GPIO_ACTIVE_LOW;
+	pdata->mdio = devm_gpiod_get_index(dev, NULL, 1, GPIOD_IN);
+	if (IS_ERR(pdata->mdio))
+		return ERR_CAST(pdata->mdio);
 
-	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;
-	}
+	pdata->mdo = devm_gpiod_get_index_optional(dev, NULL, 2, GPIOD_OUT_LOW);
+	if (IS_ERR(pdata->mdo))
+		return ERR_CAST(pdata->mdo);
 
 	return pdata;
 }
@@ -130,34 +120,19 @@ static struct mii_bus *mdio_gpio_bus_init(struct device *dev,
 {
 	struct mii_bus *new_bus;
 	struct mdio_gpio_info *bitbang;
-	int mdc, mdio, mdo;
-	unsigned long mdc_flags = GPIOF_OUT_INIT_LOW;
-	unsigned long mdio_flags = GPIOF_DIR_IN;
-	unsigned long mdo_flags = GPIOF_OUT_INIT_HIGH;
 
 	bitbang = devm_kzalloc(dev, sizeof(*bitbang), GFP_KERNEL);
 	if (!bitbang)
-		goto out;
+		return NULL;
 
 	bitbang->ctrl.ops = &mdio_gpio_ops;
-	mdc = pdata->mdc;
-	bitbang->mdc = gpio_to_desc(mdc);
-	if (pdata->mdc_active_low)
-		mdc_flags = GPIOF_OUT_INIT_HIGH | GPIOF_ACTIVE_LOW;
-	mdio = pdata->mdio;
-	bitbang->mdio = gpio_to_desc(mdio);
-	if (pdata->mdio_active_low)
-		mdio_flags |= GPIOF_ACTIVE_LOW;
-	mdo = pdata->mdo;
-	if (mdo) {
-		bitbang->mdo = gpio_to_desc(mdo);
-		if (pdata->mdo_active_low)
-			mdo_flags = GPIOF_OUT_INIT_LOW | GPIOF_ACTIVE_LOW;
-	}
+	bitbang->mdc = pdata->mdc;
+	bitbang->mdio = pdata->mdio;
+	bitbang->mdo = pdata->mdo;
 
 	new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
 	if (!new_bus)
-		goto out;
+		return NULL;
 
 	new_bus->name = "GPIO Bitbanged MDIO";
 	new_bus->parent = dev;
@@ -167,23 +142,9 @@ static struct mii_bus *mdio_gpio_bus_init(struct device *dev,
 	else
 		strncpy(new_bus->id, "gpio", MII_BUS_ID_SIZE);
 
-	if (devm_gpio_request_one(dev, mdc, mdc_flags, "mdc"))
-		goto out_free_bus;
-
-	if (devm_gpio_request_one(dev, mdio, mdio_flags, "mdio"))
-		goto out_free_bus;
-
-	if (mdo && devm_gpio_request_one(dev, mdo, mdo_flags, "mdo"))
-		goto out_free_bus;
-
 	dev_set_drvdata(dev, new_bus);
 
 	return new_bus;
-
-out_free_bus:
-	free_mdio_bitbang(new_bus);
-out:
-	return NULL;
 }
 
 static void mdio_gpio_bus_deinit(struct device *dev)
@@ -208,7 +169,7 @@ static int mdio_gpio_probe(struct platform_device *pdev)
 	int ret, bus_id;
 
 	if (pdev->dev.of_node) {
-		pdata = mdio_gpio_of_get_data(pdev);
+		pdata = mdio_gpio_of_get_data(&pdev->dev);
 		bus_id = of_alias_get_id(pdev->dev.of_node, "mdio-gpio");
 		if (bus_id < 0) {
 			dev_warn(&pdev->dev, "failed to get alias id\n");

include/linux/platform_data/mdio-gpio.h

@@ -15,13 +15,9 @@
 
 struct mdio_gpio_platform_data {
 	/* GPIO numbers for bus pins */
-	unsigned int mdc;
-	unsigned int mdio;
-	unsigned int mdo;
-
-	bool mdc_active_low;
-	bool mdio_active_low;
-	bool mdo_active_low;
+	struct gpio_desc *mdc;
+	struct gpio_desc *mdio;
+	struct gpio_desc *mdo;
 };
 
 #endif /* __LINUX_MDIO_GPIO_H */