diff options
| author | Douglas Anderson <dianders@chromium.org> | 2015-10-12 14:48:26 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-10-26 16:00:11 +0100 |
| commit | e0848f5d294c703917260a6228cc08b8be46c527 (patch) | |
| tree | 2d9d787c0552ea90e327914190392fe589417da2 /drivers/mmc/host | |
| parent | 2086f801cb2a796279e817e68255654c4cfd3be3 (diff) | |
| download | linux-e0848f5d294c703917260a6228cc08b8be46c527.tar.bz2 | |
mmc: dw_mmc: Use mmc_regulator_set_vqmmc in start_signal_voltage_switch
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>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index fcbf5524fd31..b1b7e7fa072c 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -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; u32 uhs; u32 v18 = SDMMC_UHS_18V << slot->id; - int min_uv, max_uv; int ret; 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. */ uhs = mci_readl(host, UHS_REG); - if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { - min_uv = 2700000; - max_uv = 3600000; + if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) uhs &= ~v18; - } else { - min_uv = 1700000; - max_uv = 1950000; + else uhs |= v18; - } + 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) { dev_dbg(&mmc->class_dev, - "Regulator set error %d: %d - %d\n", - ret, min_uv, max_uv); + "Regulator set error %d - %s V\n", + ret, uhs & v18 ? "1.8" : "3.3"); return ret; } } |