diff options
| author | Peng Fan <van.freenix@gmail.com> | 2016-01-04 13:16:41 +0800 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2016-01-24 12:15:14 +0100 |
| commit | d9699de85c44cb23280ca4b61a9fd846dd3508ce (patch) | |
| tree | fa5b370f267be502eb1f374ea3d8d0bd098a96d5 /arch/arm | |
| parent | 9ba18ff8efcc471635fb2768509fed025fa7db3c (diff) | |
| download | talos-obmc-uboot-d9699de85c44cb23280ca4b61a9fd846dd3508ce.tar.gz talos-obmc-uboot-d9699de85c44cb23280ca4b61a9fd846dd3508ce.zip | |
imx: mx7: default enable MDIO open drain
The management data input/output (MDIO) requires open-drain,
i.MX7D TO1.0 ENET MDIO pin has no open drain, but TO1.1 supports
this feature. So to TO1.1, need to enable open drain by setting
bits GPR0[8:7] for TO1.1.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/cpu/armv7/mx7/soc.c | 20 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-mx7/imx-regs.h | 2 |
2 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx7/soc.c b/arch/arm/cpu/armv7/mx7/soc.c index c777922e9d..1d8e470971 100644 --- a/arch/arm/cpu/armv7/mx7/soc.c +++ b/arch/arm/cpu/armv7/mx7/soc.c @@ -130,6 +130,24 @@ static void init_csu(void) writel(CSU_INIT_SEC_LEVEL0, CSU_IPS_BASE_ADDR + i * 4); } +static void imx_enet_mdio_fixup(void) +{ + struct iomuxc_gpr_base_regs *gpr_regs = + (struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR; + + /* + * The management data input/output (MDIO) requires open-drain, + * i.MX7D TO1.0 ENET MDIO pin has no open drain, but TO1.1 supports + * this feature. So to TO1.1, need to enable open drain by setting + * bits GPR0[8:7]. + */ + + if (soc_rev() >= CHIP_REV_1_1) { + setbits_le32(&gpr_regs->gpr[0], + IOMUXC_GPR_GPR0_ENET_MDIO_OPEN_DRAIN_MASK); + } +} + int arch_cpu_init(void) { init_aips(); @@ -138,6 +156,8 @@ int arch_cpu_init(void) /* Disable PDE bit of WMCR register */ imx_set_wdog_powerdown(false); + imx_enet_mdio_fixup(); + #ifdef CONFIG_APBH_DMA /* Start APBH DMA */ mxs_dma_init(); diff --git a/arch/arm/include/asm/arch-mx7/imx-regs.h b/arch/arm/include/asm/arch-mx7/imx-regs.h index e28a807ec2..58a25c7b16 100644 --- a/arch/arm/include/asm/arch-mx7/imx-regs.h +++ b/arch/arm/include/asm/arch-mx7/imx-regs.h @@ -272,6 +272,8 @@ struct src { #define IOMUXC_GPR_GPR0_DMAREQ_MUX_SEL5_SHIFT 5 #define IOMUXC_GPR_GPR0_DMAREQ_MUX_SEL6_MASK 0x40u #define IOMUXC_GPR_GPR0_DMAREQ_MUX_SEL6_SHIFT 6 +#define IOMUXC_GPR_GPR0_ENET_MDIO_OPEN_DRAIN_MASK (3 << 7) +#define IOMUXC_GPR_GPR0_ENET_MDIO_OPEN_DRAIN_SHIFT 7 /* GPR1 Bit Fields */ #define IOMUXC_GPR_GPR1_GPR_WEIM_ACT_CS0_MASK 0x1u #define IOMUXC_GPR_GPR1_GPR_WEIM_ACT_CS0_SHIFT 0 |
