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staging: mt7621-mmc: Relax cpu while waiting for stable clock

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Current code just busy waits with nop for clock becoming stable,
relaxing the cpu here improves readability and portability and also
removes a unnecessary difference with the mtk-sd driver.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian Lütke-Stetzkamp
2018-04-18 17:27:28 +02:00
committed by Greg Kroah-Hartman
parent f3698ccbd0
commit d1eade674e
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/mt7621-mmc/sd.c
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@@ -618,7 +618,7 @@ static void msdc_set_mclk(struct msdc_host *host, int ddr, unsigned int hz)
/* wait clock stable */
while (!(sdr_read32(MSDC_CFG) & MSDC_CFG_CKSTB))
;
cpu_relax();
host->sclk = sclk;
host->mclk = hz;