[PATCH v1 3/6] ARM: imx: add enet init for i.MX7D platform

[Fugang Duan]

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

Signed-off-by: Fugang Duan <b38...@freescale.com>
---
 arch/arm/mach-imx/mach-imx7d.c | 75 ++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 73 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-imx/mach-imx7d.c b/arch/arm/mach-imx/mach-imx7d.c
index 4d4a190..67d7939 100644
--- a/arch/arm/mach-imx/mach-imx7d.c
+++ b/arch/arm/mach-imx/mach-imx7d.c
@@ -5,13 +5,83 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <linux/irqchip.h>
-#include <linux/of_platform.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
+#include <linux/brcmphy.h>
+#include <linux/irqchip.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx7-iomuxc-gpr.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.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
+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 +92,7 @@ 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)
-- 
1.9.1

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