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
index 3de3b7369aef10ca59968ce9d7a9d89b2d47bec3..982224922fb16cef048262a5a8209997e21b5f51 100644 (file)
--- a/arch/arm/mach-imx/mach-imx6sx.c
+++ b/arch/arm/mach-imx/mach-imx6sx.c
@@ -8,12 +8,62 @@
 
 #include <linux/irqchip.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 <asm/mach/arch.h>
 #include <asm/mach/map.h>
 
 #include "common.h"
 #include "cpuidle.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);
+
+       /* 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();
+}
+
 static void __init imx6sx_init_machine(void)
 {
        struct device *parent;
@@ -26,6 +76,7 @@ static void __init imx6sx_init_machine(void)
 
        of_platform_populate(NULL, of_default_bus_match_table, NULL, parent);
 
+       imx6sx_enet_init();
        imx_anatop_init();
        imx6sx_pm_init();
 }