UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Ricky Wu 2021-01-13 18:57:23 +08:00 committed by Ulf Hansson
parent 3882917da8
commit 12b1c5edc3
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/mmc/host/rtsx_pci_sdmmc.c
View File

@ -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,