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mmc: sdhci-sprd: Fix vqmmc not shutting down after the card was pulled 

With cat regulator_summary, we found that vqmmc was not shutting
down after the card was pulled.

cat /sys/kernel/debug/regulator/regulator_summary
1.before fix
1)Insert SD card
 vddsdio		1    1  0 unknown  3500mV 0mA  1200mV  3750mV
    71100000.mmc-vqmmc  1                         0mA  3500mV  3600mV

2)Pull out the SD card
 vddsdio                1    1  0 unknown  3500mV 0mA  1200mV  3750mV
    71100000.mmc-vqmmc  1                         0mA  3500mV  3600mV

2.after fix
1)Insert SD cardt
 vddsdio                1    1  0 unknown  3500mV 0mA  1200mV  3750mV
    71100000.mmc-vqmmc  1                         0mA  3500mV  3600mV

2)Pull out the SD card
 vddsdio		0    1  0 unknown  3500mV 0mA  1200mV  3750mV
    71100000.mmc-vqmmc  0                         0mA  3500mV  3600mV

Fixes: fb8bd90f83 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20231115083406.7368-1-wenchao.chen@unisoc.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wenchao Chen 2023-11-15 16:34:06 +08:00 committed by Ulf Hansson
parent d9ed644f58
commit 477865af60
1 changed files with 25 additions and 0 deletions
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25
drivers/mmc/host/sdhci-sprd.c
View File

@ -416,12 +416,33 @@ static void sdhci_sprd_request_done(struct sdhci_host *host,
mmc_request_done(host->mmc, mrq);
}
static void sdhci_sprd_set_power(struct sdhci_host *host, unsigned char mode,
unsigned short vdd)
{
struct mmc_host *mmc = host->mmc;
switch (mode) {
case MMC_POWER_OFF:
mmc_regulator_set_ocr(host->mmc, mmc->supply.vmmc, 0);
mmc_regulator_disable_vqmmc(mmc);
break;
case MMC_POWER_ON:
mmc_regulator_enable_vqmmc(mmc);
break;
case MMC_POWER_UP:
mmc_regulator_set_ocr(host->mmc, mmc->supply.vmmc, vdd);
break;
}
}
static struct sdhci_ops sdhci_sprd_ops = {
.read_l = sdhci_sprd_readl,
.write_l = sdhci_sprd_writel,
.write_w = sdhci_sprd_writew,
.write_b = sdhci_sprd_writeb,
.set_clock = sdhci_sprd_set_clock,
.set_power = sdhci_sprd_set_power,
.get_max_clock = sdhci_sprd_get_max_clock,
.get_min_clock = sdhci_sprd_get_min_clock,
.set_bus_width = sdhci_set_bus_width,
@ -823,6 +844,10 @@ static int sdhci_sprd_probe(struct platform_device *pdev)
host->caps1 &= ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_SDR104 |
SDHCI_SUPPORT_DDR50);
ret = mmc_regulator_get_supply(host->mmc);
if (ret)
goto pm_runtime_disable;
ret = sdhci_setup_host(host);
if (ret)
goto pm_runtime_disable;