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| author | Wenchao Chen <wenchao.chen@unisoc.com> | 2023-11-15 16:34:06 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2023-11-23 18:04:17 +0100 |
| commit | 477865af60b2117ceaa1d558e03559108c15c78c (patch) | |
| tree | 531a2296c234faac9fee71d1e1fbd444ca4a2b0c | |
| parent | d9ed644f58670865cf067351deb71010bd87a52f (diff) | |
| download | lwn-477865af60b2117ceaa1d558e03559108c15c78c.tar.gz lwn-477865af60b2117ceaa1d558e03559108c15c78c.zip | |
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: fb8bd90f83c4 ("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>
| -rw-r--r-- | drivers/mmc/host/sdhci-sprd.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c index 6b84ba27e6ab..6b8a57e2d20f 100644 --- a/drivers/mmc/host/sdhci-sprd.c +++ b/drivers/mmc/host/sdhci-sprd.c @@ -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; |