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

drivers/mmc/host/sdhci-s3c.c

+8 −1
Original line number Diff line number Diff line
@@ -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);