diff options
| author | Wei WANG <wei_wang@realsil.com.cn> | 2013-08-21 01:46:26 (GMT) |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2013-08-30 12:25:00 (GMT) |
| commit | 1b8055b4904fe8fc77f9d96a2407178b0ff512b6 (patch) | |
| tree | 5e08931a990f76ff4c66e32422165486d55ffcc9 /drivers | |
| parent | 84d72f9cc21d6e41c620dd34b8248734cd02d995 (diff) | |
| download | linux-1b8055b4904fe8fc77f9d96a2407178b0ff512b6.tar.xz | |
mmc: rtsx: Clear SD_CLK toggle enable bit if switching voltage fail
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@realsil.com.cn>
Acked-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/rtsx_pci_sdmmc.c | 9 |
1 files changed, 8 insertions, 1 deletions
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; |