diff options
| author | Wei WANG | 2013-03-08 08:05:57 +0100 |
|---|---|---|
| committer | Chris Ball | 2013-03-22 17:35:42 +0100 |
| commit | d88691be7b37c9bba6c5dafbbaff569dd83475da (patch) | |
| tree | 9789b9f3f1e1f04d4bb79207932a8688ea440d15 /drivers/mmc/host/rtsx_pci_sdmmc.c | |
| parent | mmc: sdhci-s3c: let device core setup the default pin configuration (diff) | |
| download | kernel-qcow2-linux-d88691be7b37c9bba6c5dafbbaff569dd83475da.tar.gz kernel-qcow2-linux-d88691be7b37c9bba6c5dafbbaff569dd83475da.tar.xz kernel-qcow2-linux-d88691be7b37c9bba6c5dafbbaff569dd83475da.zip | |
mmc: rtsx_pci_sdmmc: Don't execute power up sequence repeatedly
For some Realtek card readers, the power up sequence can only be executed
when power has been turned off fully.
So the rtsx host should not start power up sequence again when set_ios
been called if the power has been turned on.
Signed-off-by: Wei WANG <wei_wang@realsil.com.cn>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/rtsx_pci_sdmmc.c')
| -rw-r--r-- | drivers/mmc/host/rtsx_pci_sdmmc.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c index f981f7d1f6e3..ad13f4240c49 100644 --- a/drivers/mmc/host/rtsx_pci_sdmmc.c +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c @@ -57,6 +57,9 @@ struct realtek_pci_sdmmc { bool eject; bool initial_mode; bool ddr_mode; + int power_state; +#define SDMMC_POWER_ON 1 +#define SDMMC_POWER_OFF 0 }; static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host) @@ -765,6 +768,9 @@ static int sd_power_on(struct realtek_pci_sdmmc *host) struct rtsx_pcr *pcr = host->pcr; int err; + if (host->power_state == SDMMC_POWER_ON) + return 0; + 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, @@ -787,6 +793,7 @@ static int sd_power_on(struct realtek_pci_sdmmc *host) if (err < 0) return err; + host->power_state = SDMMC_POWER_ON; return 0; } @@ -795,6 +802,8 @@ static int sd_power_off(struct realtek_pci_sdmmc *host) struct rtsx_pcr *pcr = host->pcr; int err; + host->power_state = SDMMC_POWER_OFF; + rtsx_pci_init_cmd(pcr); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0); @@ -1260,6 +1269,7 @@ 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; 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; |