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mmc: tmio: disable clock before changing it

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Rcar2 & 3 docs state that for going to and coming from the 0xff setting,
the clock must first be disabled before the DIV bits are changed.
Instead of tracking this, let's just do this unconditionally.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wolfram Sang 2016-01-19 12:32:58 +01:00 committed by Ulf Hansson
parent bf96208f05
commit 14d5828f4e
1 changed files with 2 additions and 0 deletions
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2
drivers/mmc/host/tmio_mmc_pio.c
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@ -174,6 +174,8 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
if (host->set_clk_div)
host->set_clk_div(host->pdev, (clk >> 22) & 1);
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);
if (!(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG))
msleep(10);