diff options
| author | Jonas Karlman <[email protected]> | 2026-07-09 23:02:41 +0000 |
|---|---|---|
| committer | Peng Fan <[email protected]> | 2026-07-12 16:18:32 +0800 |
| commit | 9118fc77f088aa21bbdeb03344f0a576a0a835d2 (patch) | |
| tree | 4b57b22fe2a54b0b10e0510fd0a82fffb5051a4b | |
| parent | 10acd5bc9a6c453b86486156e76f1fbbe116e285 (diff) | |
mmc: dw_mmc: Allow use of in-spec voltage range for vqmmc-supply
The Rockchip RK3399 SoC SDMMC IO domain supports 1.8V and 3.0V mode, and
the 3.0V mode is within SD Standards allowed 2.7V-3.6V range. However,
the commit 0b75109b6aaf ("mmc: dw_mmc: return error for invalid voltage
setting") help enforce strict 1.8V and 3.3V when setting vqmmc-supply
making mmc_set_signal_voltage() now fail for MMC_SIGNAL_VOLTAGE_330 and
leading to an improper switch to MMC_SIGNAL_VOLTAGE_180.
Use regulator_set_value_clamp() to set an SD Standards voltage range,
1.70V-1.95V and 2.7V-3.6V, I/O voltage instead of requiring an exact
regulator value to closer match Linux and to fix use of 3.3V signal
voltage on Rockchip RK3399 boards using MMC_IO_VOLTAGE=y.
Fixes: 0b75109b6aaf ("mmc: dw_mmc: return error for invalid voltage setting")
Signed-off-by: Jonas Karlman <[email protected]>
Reviewed-by: Peng Fan <[email protected]>
Signed-off-by: Peng Fan <[email protected]>
| -rw-r--r-- | drivers/mmc/dw_mmc.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c index d9c05b223d5..c2424d7875c 100644 --- a/drivers/mmc/dw_mmc.c +++ b/drivers/mmc/dw_mmc.c @@ -645,9 +645,11 @@ static int dwmci_set_ios(struct mmc *mmc) int ret; if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180) - ret = regulator_set_value(mmc->vqmmc_supply, 1800000); + ret = regulator_set_value_clamp(mmc->vqmmc_supply, + 1700000, 1800000, 1950000); else - ret = regulator_set_value(mmc->vqmmc_supply, 3300000); + ret = regulator_set_value_clamp(mmc->vqmmc_supply, + 2700000, 3300000, 3600000); if (ret && ret != -ENOSYS) return ret; } |