diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2016-01-19 12:32:58 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-02-29 11:03:06 +0100 |
| commit | 14d5828f4ebbfbe8e07d4d01eb85a684a9290243 (patch) | |
| tree | 8b39b6116594e3bdadc96ca5b788e12eb54904e4 /drivers/mmc/host | |
| parent | mmc: tmio: refactor set_clock a little (diff) | |
| download | linux-14d5828f4ebbfbe8e07d4d01eb85a684a9290243.tar.xz linux-14d5828f4ebbfbe8e07d4d01eb85a684a9290243.zip | |
mmc: tmio: disable clock before changing it
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>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc_pio.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index 7f6b5adf1209..03f6e74c1906 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -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); |