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ARM: imx: add enet init for i.mx6sx

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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>
This commit is contained in:
Fugang Duan 2014-09-24 10:11:19 +08:00 committed by Shawn Guo
parent 49c71d1c3d
commit 8f0b287e0d
1 changed files with 51 additions and 0 deletions
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51
arch/arm/mach-imx/mach-imx6sx.c
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@ -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();
}