mmc: sdhci-sprd: Fix the limitation of div

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>

diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
index f33e934..46c55ab 100644 (file)
--- a/drivers/mmc/host/sdhci-sprd.c
+++ b/drivers/mmc/host/sdhci-sprd.c
@@ -205,14 +205,14 @@ static inline u32 sdhci_sprd_calc_div(u32 base_clk, u32 clk)
        if ((base_clk / div) > (clk * 2))
                div++;
 
-       if (div > SDHCI_SPRD_CLK_MAX_DIV)
-               div = SDHCI_SPRD_CLK_MAX_DIV;
-
        if (div % 2)
                div = (div + 1) / 2;
        else
                div = div / 2;
 
+       if (div > SDHCI_SPRD_CLK_MAX_DIV)
+               div = SDHCI_SPRD_CLK_MAX_DIV;
+
        return div;
 }