diff options
| author | Yangbo Lu <yangbo.lu@nxp.com> | 2017-09-21 04:58:53 (GMT) |
|---|---|---|
| committer | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-09-25 07:25:53 (GMT) |
| commit | 00f59bc13130eda8f0c3ac56de95209826a89a83 (patch) | |
| tree | 1f58dc0aa7c80549a00b8873ee792a5bc8e0fefe /drivers/mmc | |
| parent | 540acefa2f374f3500c8ab1aba2f75e048e752b8 (diff) | |
| download | linux-00f59bc13130eda8f0c3ac56de95209826a89a83.tar.xz | |
mmc: sdhci-of-esdhc: disable SD clock for clock value 0
SD clock should be disabled for clock value 0. It's not
right to just return. This may cause failure of signal
voltage switching.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-of-esdhc.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index cd85a18..4b0f375 100644 --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -36,6 +36,8 @@ struct sdhci_esdhc { unsigned int peripheral_clock; }; +static void esdhc_clock_enable(struct sdhci_host *host, bool enable); + /** * esdhc_read*_fixup - Fixup the value read from incompatible eSDHC register * to make it compatible with SD spec. @@ -469,8 +471,10 @@ static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock) host->mmc->actual_clock = 0; - if (clock == 0) + if (clock == 0) { + esdhc_clock_enable(host, false); return; + } /* Workaround to start pre_div at 2 for VNN < VENDOR_V_23 */ if (esdhc->vendor_ver < VENDOR_V_23) |