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mmc: dw_mmc: Set vqmmc to 3v3 before disabling it

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Disabling vqmmc without setting IO domain could
cause SoC damage found in some Rockchip platforms.
To cope with the fix from IO domain, add this patch

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Change-Id: I05c53e78c073737cd0f7af9a206b9f588ffa4636
This commit is contained in:
Shawn Lin
2021-08-19 09:09:15 +08:00
committed by Tao Huang
parent 7b83efeaa4
commit 585dcf2413
1 changed files with 4 additions and 1 deletions
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5
drivers/mmc/host/dw_mmc.c
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@@ -1554,8 +1554,11 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
if (!IS_ERR(mmc->supply.vmmc))
mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
if (!IS_ERR(mmc->supply.vqmmc) && slot->host->vqmmc_enabled)
if (!IS_ERR(mmc->supply.vqmmc) && slot->host->vqmmc_enabled) {
ios->signal_voltage = MMC_SIGNAL_VOLTAGE_330;
mmc_regulator_set_vqmmc(mmc, ios);
regulator_disable(mmc->supply.vqmmc);
}
slot->host->vqmmc_enabled = false;
regs = mci_readl(slot->host, PWREN);