From: Fugang Duan <b38611@freescale.com>
Date: Tue, 14 Oct 2014 06:08:18 +0000 (+0800)
Subject: ARM: imx: add enet init for i.mx6sx
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c5642decb32982d9747b7ff4f6801ebc028d7db8;p=karo-tx-linux.git

ARM: imx: add enet init for i.mx6sx

Add enet init for i.mx6sx:
- Add phy ar8031 fixup
- Set enet clock source from internal PLL

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
---

diff --git a/arch/arm/mach-imx/mach-imx6sx.c b/arch/arm/mach-imx/mach-imx6sx.c
old mode 100644
new mode 100755
index 925c8759cfc6..7e940ac78726
--- a/arch/arm/mach-imx/mach-imx6sx.c
+++ b/arch/arm/mach-imx/mach-imx6sx.c
@@ -11,6 +11,10 @@
 #include <linux/irqchip.h>
 #include <linux/of_gpio.h>
 #include <linux/of_platform.h>
+#include <linux/phy.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
 #include <linux/pm_opp.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -89,6 +93,51 @@ static int __init imx6sx_arm2_flexcan_fixup(void)
 	return 0;
 }
 
+static int ar8031_phy_fixup(struct phy_device *dev)
+{
+	u16 val;
+
+	/* Set RGMII IO voltage to 1.8V */
+	phy_write(dev, 0x1d, 0x1f);
+	phy_write(dev, 0x1e, 0x8);
+
+	/* introduce tx clock delay */
+	phy_write(dev, 0x1d, 0x5);
+	val = phy_read(dev, 0x1e);
+	val |= 0x0100;
+	phy_write(dev, 0x1e, val);
+	return 0;
+}
+
+#define PHY_ID_AR8031   0x004dd074
+static void __init imx6sx_enet_phy_init(void)
+{
+	if (IS_BUILTIN(CONFIG_PHYLIB))
+		phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff,
+					   ar8031_phy_fixup);
+}
+
+static void __init imx6sx_enet_clk_sel(void)
+{
+	struct regmap *gpr;
+
+	gpr = syscon_regmap_lookup_by_compatible("fsl,imx6sx-iomuxc-gpr");
+	if (!IS_ERR(gpr)) {
+		regmap_update_bits(gpr, IOMUXC_GPR1,
+				   IMX6SX_GPR1_FEC_CLOCK_MUX_SEL_MASK, 0);
+		regmap_update_bits(gpr, IOMUXC_GPR1,
+				   IMX6SX_GPR1_FEC_CLOCK_PAD_DIR_MASK, 0);
+	} else {
+		pr_err("failed to find fsl,imx6sx-iomux-gpr regmap\n");
+	}
+}
+
+static inline void imx6sx_enet_init(void)
+{
+	imx6sx_enet_phy_init();
+	imx6sx_enet_clk_sel();
+}
+
 /* Add auxdata to pass platform data */
 static const struct of_dev_auxdata imx6sx_auxdata_lookup[] __initconst = {
 	OF_DEV_AUXDATA("fsl,imx6q-flexcan", 0x02090000, NULL, &flexcan_pdata[0]),
@@ -109,6 +158,7 @@ static void __init imx6sx_init_machine(void)
 	of_platform_populate(NULL, of_default_bus_match_table,
 					imx6sx_auxdata_lookup, parent);
 
+	imx6sx_enet_init();
 	imx_anatop_init();
 	imx6sx_pm_init();
 }