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mmc: sdhci-s3c: Check if clk_set_rate() succeeds 

It is possible that we may fail to set the clock rate, if we do so then
log the failure and don't bother reprogramming the IP.

Signed-off-by: Mark Brown <broonie@linaro.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Mark Brown 2014-11-04 12:26:42 +00:00 committed by Ulf Hansson
parent ae552ab02c
commit cd0cfdd248
1 changed files with 7 additions and 1 deletions
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8
drivers/mmc/host/sdhci-s3c.c
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@ -300,6 +300,7 @@ static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock)
struct device *dev = &ourhost->pdev->dev;
unsigned long timeout;
u16 clk = 0;
int ret;
host->mmc->actual_clock = 0;
@ -311,7 +312,12 @@ static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock)
sdhci_s3c_set_clock(host, clock);
clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock);
ret = clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock);
if (ret != 0) {
dev_err(dev, "%s: failed to set clock rate %uHz\n",
mmc_hostname(host->mmc), clock);
return;
}
clk = SDHCI_CLOCK_INT_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);