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mmc: fsl_esdhc_imx: correct the actual card clock

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The original code logic can not show the correct card clock, and also
has one risk when the div is 0. Because there is div -=1 before.

So move the operation before div -=1, and also involve ddr_pre_div
to get the correct value.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Reviewed-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Haibo Chen 2022-02-11 19:16:57 +08:00 committed by Stefano Babic
parent 45254edd94
commit d7d042e8b6
1 changed files with 2 additions and 1 deletions
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3
drivers/mmc/fsl_esdhc_imx.c
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@ -608,6 +608,8 @@ static void set_sysctl(struct fsl_esdhc_priv *priv, struct mmc *mmc, uint clock)
while (sdhc_clk / (div * pre_div * ddr_pre_div) > clock && div < 16)
div++;
mmc->clock = sdhc_clk / pre_div / div / ddr_pre_div;
pre_div >>= 1;
div -= 1;
@ -629,7 +631,6 @@ static void set_sysctl(struct fsl_esdhc_priv *priv, struct mmc *mmc, uint clock)
else
esdhc_setbits32(&regs->sysctl, SYSCTL_PEREN | SYSCTL_CKEN);
mmc->clock = sdhc_clk / pre_div / div;
priv->clock = clock;
}