From: Gregory CLEMENT <gregory.clement@free-electrons.com>
Date: Thu, 17 Dec 2015 09:51:04 +0000 (+0100)
Subject: net/macb: Update device tree binding for resetting PHY using GPIO
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=270c499f0993a6b3a591eda6a5b96e873b1d84fa;p=linux-beck.git

net/macb: Update device tree binding for resetting PHY using GPIO

Instead of being at the MAC level the reset gpio preperty is moved at the
PHY child node level. It is still managed by the MAC, but from the point
of view of the binding it make more sense to be part of the PHY node.

This commit also fixes a build errors if GPIOLIB is not selected.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
index 4a7fb6ccf298..38c8e845ac5d 100644
--- a/Documentation/devicetree/bindings/net/macb.txt
+++ b/Documentation/devicetree/bindings/net/macb.txt
@@ -19,8 +19,8 @@ Required properties:
 	Optional elements: 'tx_clk'
 - clocks: Phandles to input clocks.
 
-Optional properties:
-- phy-reset-gpios : Should specify the gpio for phy reset
+Optional properties for PHY child node:
+- reset-gpios : Should specify the gpio for phy reset
 
 Examples:
 
@@ -32,4 +32,8 @@ Examples:
 		local-mac-address = [3a 0e 03 04 05 06];
 		clock-names = "pclk", "hclk", "tx_clk";
 		clocks = <&clkc 30>, <&clkc 30>, <&clkc 13>;
+		ethernet-phy@1 {
+			reg = <0x1>;
+			reset-gpios = <&pioE 6 1>;
+		};
 	};
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index 01236465c298..8b45bc9ac29e 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -19,6 +19,7 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/interrupt.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
@@ -28,6 +29,7 @@
 #include <linux/phy.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/of_gpio.h>
 #include <linux/of_mdio.h>
 #include <linux/of_net.h>
 
@@ -2817,6 +2819,7 @@ static int macb_probe(struct platform_device *pdev)
 					      = macb_clk_init;
 	int (*init)(struct platform_device *) = macb_init;
 	struct device_node *np = pdev->dev.of_node;
+	struct device_node *phy_node;
 	const struct macb_config *macb_config = NULL;
 	struct clk *pclk, *hclk, *tx_clk;
 	unsigned int queue_mask, num_queues;
@@ -2905,8 +2908,14 @@ static int macb_probe(struct platform_device *pdev)
 		macb_get_hwaddr(bp);
 
 	/* Power up the PHY if there is a GPIO reset */
-	bp->reset_gpio = devm_gpiod_get_optional(&bp->pdev->dev, "phy-reset",
-						 GPIOD_OUT_HIGH);
+	phy_node =  of_get_next_available_child(np, NULL);
+	if (phy_node) {
+		int gpio = of_get_named_gpio(phy_node, "reset-gpios", 0);
+		if (gpio_is_valid(gpio))
+			bp->reset_gpio = gpio_to_desc(gpio);
+		gpiod_set_value(bp->reset_gpio, GPIOD_OUT_HIGH);
+	}
+	of_node_put(phy_node);
 
 	err = of_get_phy_mode(np);
 	if (err < 0) {
@@ -2976,7 +2985,7 @@ static int macb_remove(struct platform_device *pdev)
 		mdiobus_free(bp->mii_bus);
 
 		/* Shutdown the PHY if there is a GPIO reset */
-		gpiod_set_value(bp->reset_gpio, 0);
+		gpiod_set_value(bp->reset_gpio, GPIOD_OUT_LOW);
 
 		unregister_netdev(dev);
 		clk_disable_unprepare(bp->tx_clk);