Messages in this thread Patch in this message | | | From | <> | Subject | [PATCH 1/2] mmc: rtsx: add delay before power on | Date | Wed, 30 Dec 2020 17:04:00 +0800 |
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From: Ricky Wu <ricky_wu@realtek.com>
Make sure voltage below 0.5V before power on when do power cycle
Signed-off-by: Ricky Wu <ricky_wu@realtek.com> --- 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
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