From 4189373a3d7e3604f4b3991cdbfd0ea4c23a3002 Mon Sep 17 00:00:00 2001
From: Stefan Chulski <stefanc@marvell.com>
Date: Wed, 9 Aug 2017 10:37:43 +0300
Subject: net: mvpp2x: Add GPIO configuration support

This patch add GPIO configuration support in mvpp2x driver.
Driver will handle 10G SFP gpio reset and SFP TX disable. GPIO pins should
be set in device tree.

Signed-off-by: Stefan Chulski <stefanc@marvell.com>
Tested-by: iSoC Platform CI <ykjenk@marvell.com>
Reviewed-by: Kostya Porotchkin <kostap@marvell.com>
Reviewed-by: Igal Liberman <igall@marvell.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Stefan Roese <sr@denx.de>

diff --git a/drivers/net/mvpp2.c b/drivers/net/mvpp2.c
index 1b46218..2198b73 100644
--- a/drivers/net/mvpp2.c
+++ b/drivers/net/mvpp2.c
@@ -30,6 +30,7 @@
 #include <asm/arch/soc.h>
 #include <linux/compat.h>
 #include <linux/mbus.h>
+#include <asm-generic/gpio.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -985,6 +986,10 @@ struct mvpp2_port {
 	phy_interface_t phy_interface;
 	int phy_node;
 	int phyaddr;
+#ifdef CONFIG_DM_GPIO
+	struct gpio_desc phy_reset_gpio;
+	struct gpio_desc phy_tx_disable_gpio;
+#endif
 	int init;
 	unsigned int link;
 	unsigned int duplex;
@@ -4765,6 +4770,13 @@ static int phy_info_parse(struct udevice *dev, struct mvpp2_port *port)
 		return -EINVAL;
 	}
 
+#ifdef CONFIG_DM_GPIO
+	gpio_request_by_name(dev, "phy-reset-gpios", 0,
+			     &port->phy_reset_gpio, GPIOD_IS_OUT);
+	gpio_request_by_name(dev, "marvell,sfp-tx-disable-gpio", 0,
+			     &port->phy_tx_disable_gpio, GPIOD_IS_OUT);
+#endif
+
 	/*
 	 * ToDo:
 	 * Not sure if this DT property "phy-speed" will get accepted, so
@@ -4786,6 +4798,21 @@ static int phy_info_parse(struct udevice *dev, struct mvpp2_port *port)
 	return 0;
 }
 
+#ifdef CONFIG_DM_GPIO
+/* Port GPIO initialization */
+static void mvpp2_gpio_init(struct mvpp2_port *port)
+{
+	if (dm_gpio_is_valid(&port->phy_reset_gpio)) {
+		dm_gpio_set_value(&port->phy_reset_gpio, 0);
+		udelay(1000);
+		dm_gpio_set_value(&port->phy_reset_gpio, 1);
+	}
+
+	if (dm_gpio_is_valid(&port->phy_tx_disable_gpio))
+		dm_gpio_set_value(&port->phy_tx_disable_gpio, 0);
+}
+#endif
+
 /* Ports initialization */
 static int mvpp2_port_probe(struct udevice *dev,
 			    struct mvpp2_port *port,
@@ -4804,6 +4831,10 @@ static int mvpp2_port_probe(struct udevice *dev,
 	}
 	mvpp2_port_power_up(port);
 
+#ifdef CONFIG_DM_GPIO
+	mvpp2_gpio_init(port);
+#endif
+
 	priv->port_list[port->id] = port;
 	return 0;
 }
-- 
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