From: Roger Tseng <rogerable@xxxxxxxxxxx> Some platform have both UEFI driver and MFD/mmc driver, if entering linux while card in the slot, the card power is already on, and rtsx-mmc driver have no chance to make card power off. This will lead UHSI card failed to enter UHSI mode. It is hard to control the UEFI driver leaving state, so we power off the card power during probe. Signed-off-by: Roger Tseng <rogerable@xxxxxxxxxxx> Signed-off-by: Micky Ching <micky_ching@xxxxxxxxxxxxxx> --- drivers/mmc/host/rtsx_pci_sdmmc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c index dfde4a2..57b0796 100644 --- a/drivers/mmc/host/rtsx_pci_sdmmc.c +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c @@ -1341,8 +1341,13 @@ static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev) host->pcr = pcr; host->mmc = mmc; host->pdev = pdev; - host->power_state = SDMMC_POWER_OFF; INIT_WORK(&host->work, sd_request); + sd_power_off(host); + /* + * ref: SD spec 3.01: 6.4.1.2 Power On or Power Cycle + */ + usleep_range(1000, 2000); + platform_set_drvdata(pdev, host); pcr->slots[RTSX_SD_CARD].p_dev = pdev; pcr->slots[RTSX_SD_CARD].card_event = rtsx_pci_sdmmc_card_event; -- 1.7.9.5 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
