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Commit 03338ab8 authored by Fugang Duan's avatar Fugang Duan Committed by Alex Shi
Browse files

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: default avatarFugang Duan <B38611@freescale.com>
Signed-off-by: default avatarShawn Guo <shawn.guo@freescale.com>
(cherry picked from commit 8f0b287e0d60521052c9c4d818f670e40f4ee0e6)
Signed-off-by: default avatarAlex Shi <alex.shi@linaro.org>
parent d59cd445

arch/arm/mach-imx/mach-imx6sx.c

+51 −0
Original line number Diff line number Diff line
@@ -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;
@@ -24,6 +74,7 @@ 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();

}