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mmc: sdhci-sprd: Fix the limitation of div

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Because the bit field size of the divider coefficient register is 1023, it is
limited before returning the value.

Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com>
Link: https://lore.kernel.org/r/20220914063702.20283-1-wenchao.chen666@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wenchao Chen 2022-09-14 14:37:02 +08:00 committed by Ulf Hansson
parent 627a78b2de
commit d252e9b107
1 changed files with 3 additions and 3 deletions
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6
drivers/mmc/host/sdhci-sprd.c
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@ -205,14 +205,14 @@ static inline u32 sdhci_sprd_calc_div(u32 base_clk, u32 clk)
if ((base_clk / div) > (clk * 2)) if ((base_clk / div) > (clk * 2))
div++; div++;
if (div > SDHCI_SPRD_CLK_MAX_DIV)
div = SDHCI_SPRD_CLK_MAX_DIV;
if (div % 2) if (div % 2)
div = (div + 1) / 2; div = (div + 1) / 2;
else else
div = div / 2; div = div / 2;
if (div > SDHCI_SPRD_CLK_MAX_DIV)
div = SDHCI_SPRD_CLK_MAX_DIV;
return div; return div;
} }