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arm/imx6q-sabrelite: add enet phy ksz9021rn fixup 

The default phy RGMII pad settings can not work, tune pad skew.

Signed-off-by: Richard Zhao <richard.zhao@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Richard Zhao 2011-12-14 09:26:47 +08:00 committed by Shawn Guo
parent 3c8276c6bc
commit 477fce49ae
1 changed files with 21 additions and 0 deletions
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21
arch/arm/mach-imx/mach-imx6q.c
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@ -16,6 +16,8 @@
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/micrel_phy.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/hardware/gic.h>
#include <asm/mach/arch.h>
@ -23,8 +25,27 @@
#include <mach/common.h>
#include <mach/hardware.h>
/* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */
static int ksz9021rn_phy_fixup(struct phy_device *phydev)
{
/* min rx data delay */
phy_write(phydev, 0x0b, 0x8105);
phy_write(phydev, 0x0c, 0x0000);
/* max rx/tx clock delay, min rx/tx control delay */
phy_write(phydev, 0x0b, 0x8104);
phy_write(phydev, 0x0c, 0xf0f0);
phy_write(phydev, 0x0b, 0x104);
return 0;
}
static void __init imx6q_init_machine(void)
{
if (of_machine_is_compatible("fsl,imx6q-sabrelite"))
phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
ksz9021rn_phy_fixup);
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
imx6q_pm_init();