[PATCH] mmc: sdhci-sprd: Fix the limitation of div

From: Wenchao Chen
Date: Wed Sep 14 2022 - 02:37:24 EST


From: Wenchao Chen <wenchao.chen@xxxxxxxxxx>

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@xxxxxxxxxx>
---
drivers/mmc/host/sdhci-sprd.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
index f33e9349e4e6..46c55ab4884c 100644
--- 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;
}

--
2.17.1