From: Wolfram Sang wsa+renesas@sang-engineering.com
stable inclusion from stable-v5.10.111 commit 8b6f04b4c9d965c04431620d12afb5e729c7eacf category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5GL1Z
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 03e59b1e2f56245163b14c69e0a830c24b1a3a47 upstream.
When HS400 tuning is complete and HS400 is going to be activated, we have to keep the current number of TAPs and should not overwrite them with a hardcoded value. This was probably a copy&paste mistake when upporting HS400 support from the BSP.
Fixes: 26eb2607fa28 ("mmc: renesas_sdhi: add eMMC HS400 mode support") Reported-by: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com Signed-off-by: Wolfram Sang wsa+renesas@sang-engineering.com Reviewed-by: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20220404114902.12175-1-wsa+renesas@sang-engineerin... Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Wei Li liwei391@huawei.com --- drivers/mmc/host/renesas_sdhi_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c index 782879d46ff4..ac01fb518386 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -390,10 +390,10 @@ static void renesas_sdhi_hs400_complete(struct mmc_host *mmc) SH_MOBILE_SDHI_SCC_TMPPORT2_HS400OSEL) | sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT2));
- /* Set the sampling clock selection range of HS400 mode */ sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL, SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN | - 0x4 << SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT); + sd_scc_read32(host, priv, + SH_MOBILE_SDHI_SCC_DTCNTL));
/* Avoid bad TAP */ if (bad_taps & BIT(priv->tap_set)) {