ARM: imx: add enet init for i.MX7D platform

Add enet phy fixup, clock source init for i.MX7D platform.

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

1 files changed, 74 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/mach-imx7d.c b/arch/arm/mach-imx/mach-imx7d.c
index 62f3437257f1..b450f525a670 100644
--- a/arch/arm/mach-imx/mach-imx7d.c
+++ b/arch/arm/mach-imx/mach-imx7d.c
@@ -6,12 +6,85 @@
  * published by the Free Software Foundation.
  */
 #include <linux/irqchip.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx7-iomuxc-gpr.h>
 #include <linux/of_platform.h>
+#include <linux/phy.h>
+#include <linux/regmap.h>
+
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 
 #include "common.h"
 
+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);
+
+        /* disable phy AR8031 SmartEEE function. */
+        phy_write(dev, 0xd, 0x3);
+        phy_write(dev, 0xe, 0x805d);
+        phy_write(dev, 0xd, 0x4003);
+        val = phy_read(dev, 0xe);
+        val &= ~(0x1 << 8);
+        phy_write(dev, 0xe, val);
+
+        /* introduce tx clock delay */
+        phy_write(dev, 0x1d, 0x5);
+        val = phy_read(dev, 0x1e);
+        val |= 0x0100;
+        phy_write(dev, 0x1e, val);
+
+        return 0;
+}
+
+static int bcm54220_phy_fixup(struct phy_device *dev)
+{
+        /* enable RXC skew select RGMII copper mode */
+        phy_write(dev, 0x1e, 0x21);
+        phy_write(dev, 0x1f, 0x7ea8);
+        phy_write(dev, 0x1e, 0x2f);
+        phy_write(dev, 0x1f, 0x71b7);
+
+        return 0;
+}
+
+#define PHY_ID_AR8031   0x004dd074
+#define PHY_ID_BCM54220 0x600d8589
+
+static void __init imx7d_enet_phy_init(void)
+{
+        if (IS_BUILTIN(CONFIG_PHYLIB)) {
+                phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff,
+                                           ar8031_phy_fixup);
+                phy_register_fixup_for_uid(PHY_ID_BCM54220, 0xffffffff,
+                                           bcm54220_phy_fixup);
+        }
+}
+
+static void __init imx7d_enet_clk_sel(void)
+{
+        struct regmap *gpr;
+
+        gpr = syscon_regmap_lookup_by_compatible("fsl,imx7d-iomuxc-gpr");
+        if (!IS_ERR(gpr)) {
+                regmap_update_bits(gpr, IOMUXC_GPR1, IMX7D_GPR1_ENET_TX_CLK_SEL_MASK, 0);
+                regmap_update_bits(gpr, IOMUXC_GPR1, IMX7D_GPR1_ENET_CLK_DIR_MASK, 0);
+        } else {
+                pr_err("failed to find fsl,imx7d-iomux-gpr regmap\n");
+        }
+}
+
+static inline void imx7d_enet_init(void)
+{
+        imx7d_enet_phy_init();
+        imx7d_enet_clk_sel();
+}
+
 static void __init imx7d_init_machine(void)
 {
         struct device *parent;
@@ -22,6 +95,7 @@ static void __init imx7d_init_machine(void)
 
         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
         imx_anatop_init();
+        imx7d_enet_init();
 }
 
 static void __init imx7d_init_irq(void)