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authorWolfram Sang <wsa+renesas@sang-engineering.com>2016-05-02 22:25:41 +0200
committerUlf Hansson <ulf.hansson@linaro.org>2016-05-04 09:28:04 +0200
commit8fc009986471729533fb1246c7ea9395635dac26 (patch)
tree21964472281d819c0654d6886367cbfe5dadc88b /drivers/mmc
parent3d376fb2ea907f0c1bbccf87125456439feb4ed4 (diff)
mmc: sh_mobile_sdhi: only change the clock on RCar Gen2+
We had a regression on r8a7740 where the SDHI clock was a generic peripheral clock, so changing its rate was not desired. This should be fixed in the clock driver. However, it also shows that the new clock calculation should only be used on tested systems. Add a check for that. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sh_mobile_sdhi.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 19e4c29e4233..ac9ba36da39b 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -168,6 +168,10 @@ static unsigned int sh_mobile_sdhi_clk_update(struct tmio_mmc_host *host,
unsigned int freq, diff, best_freq = 0, diff_min = ~0;
int i;
+ /* tested only on RCar Gen2+ currently; may work for others */
+ if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
+ return clk_get_rate(priv->clk);
+
/*
* We want the bus clock to be as close as possible to, but no
* greater than, new_clock. As we can divide by 1 << i for