linux-kernel - [PATCH 2/3] net: ks8851: switch to using gpiod API

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Message-Id: <20220906204922.3789922-2-dmitry.torokhov@gmail.com>
Date:   Tue,  6 Sep 2022 13:49:21 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] net: ks8851: switch to using gpiod API

This patch switches the driver away from legacy gpio/of_gpio API to
gpiod API, and removes use of of_get_named_gpio_flags() which I want to
make private to gpiolib.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/net/ethernet/micrel/ks8851.h        |  2 +-
 drivers/net/ethernet/micrel/ks8851_common.c | 40 ++++++++++-----------
 2 files changed, 20 insertions(+), 22 deletions(-)

diff --git a/drivers/net/ethernet/micrel/ks8851.h b/drivers/net/ethernet/micrel/ks8851.h
index 6f34a61739b6..fecd43754cea 100644
--- a/drivers/net/ethernet/micrel/ks8851.h
+++ b/drivers/net/ethernet/micrel/ks8851.h
@@ -403,7 +403,7 @@ struct ks8851_net {
 	struct eeprom_93cx6	eeprom;
 	struct regulator	*vdd_reg;
 	struct regulator	*vdd_io;
-	int			gpio;
+	struct gpio_desc	*gpio;
 	struct mii_bus		*mii_bus;
 
 	void			(*lock)(struct ks8851_net *ks,
diff --git a/drivers/net/ethernet/micrel/ks8851_common.c b/drivers/net/ethernet/micrel/ks8851_common.c
index ec8457e61b45..cfbc900d4aeb 100644
--- a/drivers/net/ethernet/micrel/ks8851_common.c
+++ b/drivers/net/ethernet/micrel/ks8851_common.c
@@ -17,10 +17,9 @@
 #include <linux/cache.h>
 #include <linux/crc32.h>
 #include <linux/mii.h>
+#include <linux/gpio/consumer.h>
 #include <linux/regulator/consumer.h>
 
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
 #include <linux/of_mdio.h>
 #include <linux/of_net.h>
 
@@ -1117,24 +1116,23 @@ int ks8851_probe_common(struct net_device *netdev, struct device *dev,
 {
 	struct ks8851_net *ks = netdev_priv(netdev);
 	unsigned cider;
-	int gpio;
 	int ret;
 
 	ks->netdev = netdev;
 	ks->tx_space = 6144;
 
-	gpio = of_get_named_gpio_flags(dev->of_node, "reset-gpios", 0, NULL);
-	if (gpio == -EPROBE_DEFER)
-		return gpio;
-
-	ks->gpio = gpio;
-	if (gpio_is_valid(gpio)) {
-		ret = devm_gpio_request_one(dev, gpio,
-					    GPIOF_OUT_INIT_LOW, "ks8851_rst_n");
-		if (ret) {
-			dev_err(dev, "reset gpio request failed\n");
-			return ret;
-		}
+	ks->gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+	ret = PTR_ERR_OR_ZERO(ks->gpio);
+	if (ret) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "reset gpio request failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = gpiod_set_consumer_name(ks->gpio, "ks8851_rst_n");
+	if (ret) {
+		dev_err(dev, "failed to set reset gpio name: %d\n", ret);
+		return ret;
 	}
 
 	ks->vdd_io = devm_regulator_get(dev, "vdd-io");
@@ -1161,9 +1159,9 @@ int ks8851_probe_common(struct net_device *netdev, struct device *dev,
 		goto err_reg;
 	}
 
-	if (gpio_is_valid(gpio)) {
+	if (ks->gpio) {
 		usleep_range(10000, 11000);
-		gpio_set_value(gpio, 1);
+		gpiod_set_value_cansleep(ks->gpio, 0);
 	}
 
 	spin_lock_init(&ks->statelock);
@@ -1239,8 +1237,8 @@ int ks8851_probe_common(struct net_device *netdev, struct device *dev,
 err_id:
 	ks8851_unregister_mdiobus(ks);
 err_mdio:
-	if (gpio_is_valid(gpio))
-		gpio_set_value(gpio, 0);
+	if (ks->gpio)
+		gpiod_set_value_cansleep(ks->gpio, 1);
 	regulator_disable(ks->vdd_reg);
 err_reg:
 	regulator_disable(ks->vdd_io);
@@ -1259,8 +1257,8 @@ void ks8851_remove_common(struct device *dev)
 		dev_info(dev, "remove\n");
 
 	unregister_netdev(priv->netdev);
-	if (gpio_is_valid(priv->gpio))
-		gpio_set_value(priv->gpio, 0);
+	if (priv->gpio)
+		gpiod_set_value_cansleep(priv->gpio, 1);
 	regulator_disable(priv->vdd_reg);
 	regulator_disable(priv->vdd_io);
 }
-- 
2.37.2.789.g6183377224-goog