[PATCH 1/2] mmc: rtsx: add delay before power on

From: ricky_wu
Date: Wed Dec 30 2020 - 04:05:16 EST


From: Ricky Wu <ricky_wu@xxxxxxxxxxx>

Make sure voltage below 0.5V before power on
when do power cycle

Signed-off-by: Ricky Wu <ricky_wu@xxxxxxxxxxx>
---
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..d21b99962b36 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;

+ mdelay(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