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: Doug Anderson <diand...@chromium.org>
---
Changes in v3:
- Continue to check for errors if VQMMC is not an error as per Andrew.
Changes in v2: None
drivers/mmc/host/dw_mmc.c | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 67c0451..b3993d4 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1160,7 +1160,6 @@ static int dw_mci_switch_voltage(struct mmc_host *mmc,
struct mmc_ios *ios)
struct dw_mci *host = slot->host;
u32 uhs;
u32 v18 = SDMMC_UHS_18V << slot->id;
- int min_uv, max_uv;
int ret;
/*
@@ -1169,22 +1168,18 @@ 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;
}
}
--
2.2.0.rc0.207.ga3a616c
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
