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mmc: fsl_esdhc_imx: drop redundant clock settings

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During mmc initialization, there are several calls to mmc_set_clock
and mmc_set_ios. When mmc_power_off, the mmc->clock will be set,
but the imx driver will use 400KHz. So the following calls
to mmc_set_ios will set the clock several times which is redundant
in fsl_esdhc_imx driver. So let's simplify to remove redundant
clock settings.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2019-11-04 17:14:15 +08:00
parent 618704753e
commit 1d01c984b9
1 changed files with 7 additions and 5 deletions
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12
drivers/mmc/fsl_esdhc_imx.c
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@ -627,9 +627,6 @@ static void set_sysctl(struct fsl_esdhc_priv *priv, struct mmc *mmc, uint clock)
int sdhc_clk = priv->sdhc_clk;
uint clk;
if (clock < mmc->cfg->f_min)
clock = mmc->cfg->f_min;
while (sdhc_clk / (16 * pre_div * ddr_pre_div) > clock && pre_div < 256)
pre_div *= 2;
@ -958,6 +955,7 @@ static int esdhc_set_ios_common(struct fsl_esdhc_priv *priv, struct mmc *mmc)
{
struct fsl_esdhc *regs = priv->esdhc_regs;
int ret __maybe_unused;
u32 clock;
#ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
/* Select to use peripheral clock */
@ -966,8 +964,12 @@ static int esdhc_set_ios_common(struct fsl_esdhc_priv *priv, struct mmc *mmc)
esdhc_clock_control(priv, true);
#endif
/* Set the clock speed */
if (priv->clock != mmc->clock)
set_sysctl(priv, mmc, mmc->clock);
clock = mmc->clock;
if (clock < mmc->cfg->f_min)
clock = mmc->cfg->f_min;
if (priv->clock != clock)
set_sysctl(priv, mmc, clock);
#ifdef MMC_SUPPORTS_TUNING
if (mmc->clk_disable) {