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mmc: sdhci-xenon: add set_power callback 

Xenon sdh controller requests proper SD bus voltage select
bits programmed even with vmmc power supply. Any reserved
value(100b-000b) programmed in this field will lead to controller
ignore SD bus power bit and keep its value at zero.
Add set_power callback to handle this.

Signed-off-by: Zhoujie Wu <zjwu@marvell.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Fixes: 3a3748dba8 ("mmc: sdhci-xenon: Add Marvell Xenon SDHC core functionality")
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Zhoujie Wu 2017-08-21 11:02:09 -07:00 committed by Ulf Hansson
parent a7c17d8ae4
commit 99c14fc360
1 changed files with 19 additions and 0 deletions
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19
drivers/mmc/host/sdhci-xenon.c
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@ -210,8 +210,27 @@ static void xenon_set_uhs_signaling(struct sdhci_host *host,
sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
}
static void xenon_set_power(struct sdhci_host *host, unsigned char mode,
unsigned short vdd)
{
struct mmc_host *mmc = host->mmc;
u8 pwr = host->pwr;
sdhci_set_power_noreg(host, mode, vdd);
if (host->pwr == pwr)
return;
if (host->pwr == 0)
vdd = 0;
if (!IS_ERR(mmc->supply.vmmc))
mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
}
static const struct sdhci_ops sdhci_xenon_ops = {
.set_clock = sdhci_set_clock,
.set_power = xenon_set_power,
.set_bus_width = sdhci_set_bus_width,
.reset = xenon_reset,
.set_uhs_signaling = xenon_set_uhs_signaling,