From 12b1c5edc3a96824d4e2aaf882b5aaa6f2cb4b3b Mon Sep 17 00:00:00 2001 From: Ricky Wu Date: Wed, 13 Jan 2021 18:57:23 +0800 Subject: 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 Link: https://lore.kernel.org/r/20210113105723.7916-1-ricky_wu@realtek.com Signed-off-by: Ulf Hansson --- drivers/mmc/host/rtsx_pci_sdmmc.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers') 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, -- cgit v1.2.3