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mmc: sdhci-dwc: Fix SDHCI_RESET_ALL for CQHCI for rk35xx

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For rockchip sdhci controllers, SDHCI_RESET_ALL resets also CQHCI registers.
Normally, SDHCI_RESET_ALL is not used while CQHCI is enabled, but that can
happen on the error path. e.g. if mmc_cqe_recovery() fails, mmc_blk_reset()
is called which, for a eMMC that does not support HW Reset, will cycle the
bus power and the driver will perform SDHCI_RESET_ALL.

So whenever performing SDHCI_RESET_ALL ensure CQHCI is deactivated.
That will force the driver to reinitialize CQHCI when it is next used.

Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Change-Id: Iee491501ff7e32e347303f5389f22eef9f8f658b
This commit is contained in:
Yifeng Zhao
2024-06-22 10:36:18 +08:00
committed by Tao Huang
parent 95d65f02d0
commit 75dfde714b
1 changed files with 3 additions and 0 deletions
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3
drivers/mmc/host/sdhci-of-dwcmshc.c
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@@ -529,6 +529,9 @@ static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask)
struct rk35xx_priv *priv = dwc_priv->priv;
u32 extra = sdhci_readl(host, DECMSHC_EMMC_MISC_CON);
if ((host->mmc->caps2 & MMC_CAP2_CQE) && (mask & SDHCI_RESET_ALL))
cqhci_deactivate(host->mmc);
if (mask & SDHCI_RESET_ALL && priv->reset) {
reset_control_assert(priv->reset);
udelay(1);