The default configuration of rk3399 EMMC PHY does not enable the strobe line, and EMMC controller will got data transmission error at HS400 mode.
Signed-off-by: Yifeng Zhao yifeng.zhao@rock-chips.com ---
drivers/mmc/rockchip_sdhci.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c index 1ac00587d4..278473899c 100644 --- a/drivers/mmc/rockchip_sdhci.c +++ b/drivers/mmc/rockchip_sdhci.c @@ -143,6 +143,9 @@ static void rk3399_emmc_phy_power_on(struct rockchip_emmc_phy *phy, u32 clock) writel(RK_CLRSETBITS(3 << 12, freqsel << 12), &phy->emmcphy_con[0]); writel(RK_CLRSETBITS(1 << 1, 1 << 1), &phy->emmcphy_con[6]);
+ /* REN Enable on STRB Line for HS400 */ + writel(RK_CLRSETBITS(0, 1 << 9), &phy->emmcphy_con[2]); + read_poll_timeout(readl, &phy->emmcphy_status, dllrdy, PHYCTRL_DLL_LOCK_WO_TMOUT(dllrdy), 1, 5000); }