diff options
| author |   Ricky Wu <ricky_wu@realtek.com> | 2021-01-13 18:57:23 +0800 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2021-02-01 11:54:45 +0100 |
| commit | 12b1c5edc3a96824d4e2aaf882b5aaa6f2cb4b3b (patch) | |
| tree | 019cb2de19319f7587d8ac818bf8c40f93832304 /drivers/mmc/host/rtsx_pci_sdmmc.c | |
| parent | mmc: sunxi-mmc: Ensure host is suspended during system sleep (diff) | |
| download | linux-dev-12b1c5edc3a96824d4e2aaf882b5aaa6f2cb4b3b.tar.xz linux-dev-12b1c5edc3a96824d4e2aaf882b5aaa6f2cb4b3b.zip | |
mmc: rtsx: add delay before power on
To make sure voltage is below 0.5V before power on during a power cycle,
add a delay of at least 100ms. The delays in the mmc core is not sufficient
for the rtsx pci device.
Signed-off-by: Ricky Wu <ricky_wu@realtek.com>
Link: https://lore.kernel.org/r/20210113105723.7916-1-ricky_wu@realtek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/rtsx_pci_sdmmc.c')
| -rw-r--r-- | drivers/mmc/host/rtsx_pci_sdmmc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c index 446efbb9e099..4ca937415734 100644 --- a/drivers/mmc/host/rtsx_pci_sdmmc.c +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c @@ -906,6 +906,8 @@ static int sd_power_on(struct realtek_pci_sdmmc *host) if (host->power_state == SDMMC_POWER_ON) return 0; + msleep(100); + rtsx_pci_init_cmd(pcr); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE, |