diff options
| author | Peng Fan <peng.fan@nxp.com> | 2015-12-23 10:52:01 +0800 |
|---|---|---|
| committer | Max Krummenacher <max.krummenacher@toradex.com> | 2016-06-22 14:36:39 +0200 |
| commit | eb5f9d279d2f1140ddc4204f9b0bf02422ebabda (patch) | |
| tree | 8db63877bec9e03dc3d6ae62f9d3c8ee65602525 | |
| parent | 7505f1934ae86e29710eaa881ddfe7660c0b9421 (diff) | |
MLK-12066 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>
| -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 6616e41952..d5403662bf 100644 --- a/arch/arm/cpu/armv7/mx7/soc.c +++ b/arch/arm/cpu/armv7/mx7/soc.c @@ -170,6 +170,24 @@ static void imx_set_wdog_powerdown(bool enable) writew(enable, &wdog4->wmcr); } +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 (is_soc_rev(CHIP_REV_1_1) >= 0) { + setbits_le32(&gpr_regs->gpr[0], + IOMUXC_GPR_GPR0_ENET_MDIO_OPEN_DRAIN_MASK); + } +} + static void set_epdc_qos(void) { #define REGS_QOS_BASE QOSC_IPS_BASE_ADDR @@ -208,6 +226,8 @@ int arch_cpu_init(void) imx_set_pcie_phy_power_down(); + 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 532b0daa6f..cf888314f7 100644 --- a/arch/arm/include/asm/arch-mx7/imx-regs.h +++ b/arch/arm/include/asm/arch-mx7/imx-regs.h @@ -273,6 +273,8 @@ 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 |