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mmc: bcm2835: Don't overwrite max frequency unconditionally 

The optional DT parameter max-frequency could init the max bus frequency.
So take care of this, before setting the max bus frequency.

Fixes: 660fc733bd ("mmc: bcm2835: Add new driver for the sdhost controller.")
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Cc: <stable@vger.kernel.org> # 4.12+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Phil Elwell 2018-02-12 21:13:44 +01:00 committed by Ulf Hansson
parent fe0e58048f
commit 118032be38
1 changed files with 2 additions and 1 deletions
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3
drivers/mmc/host/bcm2835.c
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@ -1265,7 +1265,8 @@ static int bcm2835_add_host(struct bcm2835_host *host)
char pio_limit_string[20];
int ret;
mmc->f_max = host->max_clk;
if (!mmc->f_max || mmc->f_max > host->max_clk)
mmc->f_max = host->max_clk;
mmc->f_min = host->max_clk / SDCDIV_MAX_CDIV;
mmc->max_busy_timeout = ~0 / (mmc->f_max / 1000);