From: Ricky Wu <[email protected]> Make sure voltage below 0.5V before power on when do power cycle At mmc-core recognition card phase will do power cycle quickly so our device need at least 100ms to make voltage down to below 0.5V
Signed-off-by: Ricky Wu <[email protected]> --- drivers/mmc/host/rtsx_pci_sdmmc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c index e6f5bbce5685..0e5043a03965 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, -- 2.17.1
