Commit 12b1c5ed authored by Ricky Wu's avatar Ricky Wu Committed by Ulf Hansson
Browse files

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: default avatarRicky Wu <ricky_wu@realtek.com>
Link: https://lore.kernel.org/r/20210113105723.7916-1-ricky_wu@realtek.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 3882917d

drivers/mmc/host/rtsx_pci_sdmmc.c

+2 −0
Original line number Diff line number Diff line
@@ -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,