From: Chevron Li chevron.li@bayhubtech.com
commit 096cc0cddf58232bded309336961784f1d1c85f8 upstream.
The SD card is recognized failed sometimes when resume from suspend. Because CD# debounce time too long then card present report wrong. Finally, card is recognized failed.
Signed-off-by: Chevron Li chevron.li@bayhubtech.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20221104095512.4068-1-chevron.li@bayhubtech.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mmc/host/sdhci-pci-o2micro.c | 7 +++++++ 1 file changed, 7 insertions(+)
--- a/drivers/mmc/host/sdhci-pci-o2micro.c +++ b/drivers/mmc/host/sdhci-pci-o2micro.c @@ -32,6 +32,7 @@ #define O2_SD_CAPS 0xE0 #define O2_SD_ADMA1 0xE2 #define O2_SD_ADMA2 0xE7 +#define O2_SD_MISC_CTRL2 0xF0 #define O2_SD_INF_MOD 0xF1 #define O2_SD_MISC_CTRL4 0xFC #define O2_SD_MISC_CTRL 0x1C0 @@ -874,6 +875,12 @@ static int sdhci_pci_o2_probe(struct sdh /* Set Tuning Windows to 5 */ pci_write_config_byte(chip->pdev, O2_SD_TUNING_CTRL, 0x55); + //Adjust 1st and 2nd CD debounce time + pci_read_config_dword(chip->pdev, O2_SD_MISC_CTRL2, &scratch_32); + scratch_32 &= 0xFFE7FFFF; + scratch_32 |= 0x00180000; + pci_write_config_dword(chip->pdev, O2_SD_MISC_CTRL2, scratch_32); + pci_write_config_dword(chip->pdev, O2_SD_DETECT_SETTING, 1); /* Lock WP */ ret = pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);