mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-27 11:19:37 +00:00
Code Issues Releases Wiki Activity

mmc: renesas_sdhi: special 4tap settings only apply to HS400

Browse source 
commit 46d4820f94 upstream.

Previous documentation was vague, so we included SDR104 for slow SDnH
clock settings. It turns out now, that it is only needed for HS400.

Fixes: bb6d3fa98a ("clk: renesas: rcar-gen3: Switch to new SD clock handling")
Cc: stable@vger.kernel.org
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>
Link: https://lore.kernel.org/r/20220404100508.3209-1-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wolfram Sang 2022-04-04 12:05:08 +02:00 committed by Greg Kroah-Hartman
parent 8cfcb999fe
commit 0aa31f381e
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/mmc/host/renesas_sdhi_core.c
View file

@ -144,9 +144,9 @@ static unsigned int renesas_sdhi_clk_update(struct tmio_mmc_host *host,
return clk_get_rate(priv->clk);
if (priv->clkh) {
/* HS400 with 4TAP needs different clock settings */
bool use_4tap = priv->quirks && priv->quirks->hs400_4taps;
bool need_slow_clkh = (host->mmc->ios.timing == MMC_TIMING_UHS_SDR104) ||
(host->mmc->ios.timing == MMC_TIMING_MMC_HS400);
bool need_slow_clkh = host->mmc->ios.timing == MMC_TIMING_MMC_HS400;
clkh_shift = use_4tap && need_slow_clkh ? 1 : 2;
ref_clk = priv->clkh;
}