lisa/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mmc: sdhci-sprd: Fix eMMC init failure after hw reset

Browse Source 
commit 8abf77c88929b6d20fa4f9928b18d6448d64e293 upstream.

Some eMMC devices that do not close the auto clk gate after hw reset will
cause eMMC initialization to fail. Let's fix this.

Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com>
Fixes: ff874dbc4f86 ("mmc: sdhci-sprd: Disable CLK_AUTO when the clock is less than 400K")
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20231204064934.21236-1-wenchao.chen@unisoc.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wenchao Chen 2023-12-04 14:49:34 +08:00 committed by Greg Kroah-Hartman
parent a9c9ffcd21
commit c4541e3980
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/mmc/host/sdhci-sprd.c
View File

@ -223,15 +223,19 @@ static inline void _sdhci_sprd_set_clock(struct sdhci_host *host,
div = ((div & 0x300) >> 2) | ((div & 0xFF) << 8);
sdhci_enable_clk(host, div);
val = sdhci_readl(host, SDHCI_SPRD_REG_32_BUSY_POSI);
mask = SDHCI_SPRD_BIT_OUTR_CLK_AUTO_EN | SDHCI_SPRD_BIT_INNR_CLK_AUTO_EN;
/* Enable CLK_AUTO when the clock is greater than 400K. */
if (clk > 400000) {
val = sdhci_readl(host, SDHCI_SPRD_REG_32_BUSY_POSI);
mask = SDHCI_SPRD_BIT_OUTR_CLK_AUTO_EN |
SDHCI_SPRD_BIT_INNR_CLK_AUTO_EN;
if (mask != (val & mask)) {
val |= mask;
sdhci_writel(host, val, SDHCI_SPRD_REG_32_BUSY_POSI);
}
} else {
if (val & mask) {
val &= ~mask;
sdhci_writel(host, val, SDHCI_SPRD_REG_32_BUSY_POSI);
}
}
}