Commit 22003000 authored by Tomasz Figa's avatar Tomasz Figa Committed by Chris Ball

mmc: sdhci-s3c: Do not allow frequencies higher than requested

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: default avatarTomasz Figa <tomasz.figa@gmail.com>
Tested-by: default avatarHeiko Stuebner <heiko@sntech.de>
Acked-by: default avatarHeiko Stuebner <heiko@sntech.de>
Tested-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Acked-by; Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: default avatarChris Ball <chris@printf.net>
parent 3ac147fa
...@@ -126,11 +126,18 @@ static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, ...@@ -126,11 +126,18 @@ static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost,
rate = ourhost->clk_rates[src]; rate = ourhost->clk_rates[src];
for (shift = 0; shift < 8; ++shift) { for (shift = 0; shift <= 8; ++shift) {
if ((rate >> shift) <= wanted) if ((rate >> shift) <= wanted)
break; 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", dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n",
src, rate, wanted, rate >> shift); src, rate, wanted, rate >> shift);
......
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