This patch modifies sdhci_s3c_consider_clock() to fail if bus clock
being considered can not provide frequency lower or equal requested,
instead of returning the lowest supported.
Signed-off-by: Tomasz Figa <tomasz.figa@xxxxxxxxx>
---
drivers/mmc/host/sdhci-s3c.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index bad0e00..d61eb5a 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -126,11 +126,18 @@ static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost,
rate = ourhost->clk_rates[src];
- for (shift = 0; shift < 8; ++shift) {
+ for (shift = 0; shift <= 8; ++shift) {
if ((rate >> shift) <= wanted)
break;
}
+ if (shift > 8) {
+ dev_dbg(&ourhost->pdev->dev,
+ "clk %d: rate %ld, min rate %lu > wanted %u\n",
+ src, rate, rate / 256, wanted);
+ return UINT_MAX;
+ }
+
dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n",
src, rate, wanted, rate >> shift);
--
1.8.5.2
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