From: Wei WANG <wei_wang@xxxxxxxxxxxxxx> If switching voltage fails, SD_CLK toggle enable bit should been cleared so that SD host can control SD clock automatically. Signed-off-by: Wei WANG <wei_wang@xxxxxxxxxxxxxx> --- drivers/mmc/host/rtsx_pci_sdmmc.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c index fcb368e..0fefe4e 100644 --- a/drivers/mmc/host/rtsx_pci_sdmmc.c +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c @@ -227,6 +227,7 @@ static void sd_send_cmd_get_rsp(struct realtek_pci_sdmmc *host, int stat_idx = 0; u8 rsp_type; int rsp_len = 5; + bool clock_toggled = false; dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n", __func__, cmd_idx, arg); @@ -270,6 +271,8 @@ static void sd_send_cmd_get_rsp(struct realtek_pci_sdmmc *host, 0xFF, SD_CLK_TOGGLE_EN); if (err < 0) goto out; + + clock_toggled = true; } rtsx_pci_init_cmd(pcr); @@ -350,6 +353,10 @@ static void sd_send_cmd_get_rsp(struct realtek_pci_sdmmc *host, out: cmd->error = err; + + if (err && clock_toggled) + rtsx_pci_write_register(pcr, SD_BUS_STAT, + SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0); } static int sd_rw_multi(struct realtek_pci_sdmmc *host, struct mmc_request *mrq) @@ -1121,11 +1128,11 @@ static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) goto out; } +out: /* Stop toggle SD clock in idle */ err = rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0); -out: mutex_unlock(&pcr->pcr_mutex); return err; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
