diff options
Diffstat (limited to 'arch/arm/cpu/armv7/mx7/soc.c')
| -rw-r--r-- | arch/arm/cpu/armv7/mx7/soc.c | 20 |
1 files changed, 20 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(); |