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mmc: sdhci-brcmstb: use clk_get_rate(base_clk) in PM resume

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Use clk_get_rate for base_clk on resume before setting new rate.
This change ensures that the clock api returns current rate
and sets the clock to the desired rate and honors CLK_GET_NO_CACHE
attribute used by clock api.

Fixes: 97904a5985 (mmc: sdhci-brcmstb: Add ability to increase max clock rate for 72116b0)
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220714174132.18541-1-kdasu.kdev@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Kamal Dasu 2022-07-14 13:41:32 -04:00 committed by Ulf Hansson
parent 99ce0f754c
commit 886201c70a
1 changed files with 8 additions and 1 deletions
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9
drivers/mmc/host/sdhci-brcmstb.c
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@ -406,7 +406,14 @@ static int sdhci_brcmstb_resume(struct device *dev)
ret = sdhci_pltfm_resume(dev);
if (!ret && priv->base_freq_hz) {
ret = clk_prepare_enable(priv->base_clk);
if (!ret)
/*
* Note: using clk_get_rate() below as clk_get_rate()
* honors CLK_GET_RATE_NOCACHE attribute, but clk_set_rate()
* may do implicit get_rate() calls that do not honor
* CLK_GET_RATE_NOCACHE.
*/
if (!ret &&
(clk_get_rate(priv->base_clk) != priv->base_freq_hz))
ret = clk_set_rate(priv->base_clk, priv->base_freq_hz);
}