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mmc: dw_mmc: Use mmc_regulator_set_vqmmc in start_signal_voltage_switch

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We've introduced a new helper in the MMC core:
mmc_regulator_set_vqmmc().  Let's use this in dw_mmc.  Using this new
helper has some advantages:

1. We get the mmc_regulator_set_vqmmc() behavior of trying to match
   VQMMC and VMMC when the signal voltage is 3.3V.  This ensures max
   compatibility.

2. We get rid of a few more warnings when probing unsupported
   voltages.

3. We get rid of some non-dw_mmc specific code in dw_mmc.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Douglas Anderson 2015-10-12 14:48:26 +02:00 committed by Ulf Hansson
parent 2086f801cb
commit e0848f5d29
1 changed files with 6 additions and 11 deletions
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17
drivers/mmc/host/dw_mmc.c
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@ -1279,7 +1279,6 @@ static int dw_mci_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
const struct dw_mci_drv_data *drv_data = host->drv_data; const struct dw_mci_drv_data *drv_data = host->drv_data;
u32 uhs; u32 uhs;
u32 v18 = SDMMC_UHS_18V << slot->id; u32 v18 = SDMMC_UHS_18V << slot->id;
int min_uv, max_uv;
int ret; int ret;
if (drv_data && drv_data->switch_voltage) if (drv_data && drv_data->switch_voltage)
@ -1291,22 +1290,18 @@ static int dw_mci_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
* does no harm but you need to set the regulator directly. Try both. * does no harm but you need to set the regulator directly. Try both.
*/ */
uhs = mci_readl(host, UHS_REG); uhs = mci_readl(host, UHS_REG);
if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
min_uv = 2700000;
max_uv = 3600000;
uhs &= ~v18; uhs &= ~v18;
} else { else
min_uv = 1700000;
max_uv = 1950000;
uhs |= v18; uhs |= v18;
}
if (!IS_ERR(mmc->supply.vqmmc)) { if (!IS_ERR(mmc->supply.vqmmc)) {
ret = regulator_set_voltage(mmc->supply.vqmmc, min_uv, max_uv); ret = mmc_regulator_set_vqmmc(mmc, ios);
if (ret) { if (ret) {
dev_dbg(&mmc->class_dev, dev_dbg(&mmc->class_dev,
"Regulator set error %d: %d - %d\n", "Regulator set error %d - %s V\n",
ret, min_uv, max_uv); ret, uhs & v18 ? "1.8" : "3.3");
return ret; return ret;
} }
} }