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mmc: rockchip_sdhci: enable strobe line for HS400

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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>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Yifeng Zhao 2021-10-15 16:41:27 +08:00 committed by Kever Yang
parent f2cdd44adb
commit 022f552704
1 changed files with 3 additions and 0 deletions
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3
drivers/mmc/rockchip_sdhci.c
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@ -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);
}