diff options
| author | Yue Hu <huyue2@yulong.com> | 2020-06-09 10:14:31 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-07-13 12:18:23 +0200 |
| commit | 40e6c479e9250808ff19ccfb6d48979ecb2377bd (patch) | |
| tree | 3b9912457ccd6710e2e7688bc2e774a57bcf3e19 /drivers/mmc/core | |
| parent | mmc: sdio: Enable SDIO 4-bit bus if not support SD_SCR_BUS_WIDTH_4 for SD com... (diff) | |
| download | linux-40e6c479e9250808ff19ccfb6d48979ecb2377bd.tar.xz linux-40e6c479e9250808ff19ccfb6d48979ecb2377bd.zip | |
mmc: sdio: Fix 1-bit mode for SD-combo cards during suspend
Commit 6b5eda369ac3 ("sdio: put active devices into 1-bit mode during
suspend") disabled 4-bit mode during system suspend. After this patch,
commit 7310ece86ad7 ("mmc: implement SD-combo (IO+mem) support") used
new sdio_enable_4bit_bus() instead of sdio_enable_wide() to support
SD-combo cards, also for card resume. However, no corresponding support
added during suspend. That is not correct. Let's fix it.
Signed-off-by: Yue Hu <huyue2@yulong.com>
Link: https://lore.kernel.org/r/20200609081431.6376-1-zbestahu@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/sdio.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index d9ba7dd7cf1b..0e32ca7b9488 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -303,6 +303,27 @@ static int sdio_disable_wide(struct mmc_card *card) return 0; } +static int sdio_disable_4bit_bus(struct mmc_card *card) +{ + int err; + + if (card->type == MMC_TYPE_SDIO) + goto out; + + if (!(card->host->caps & MMC_CAP_4_BIT_DATA)) + return 0; + + if (!(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) + return 0; + + err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1); + if (err) + return err; + +out: + return sdio_disable_wide(card); +} + static int sdio_enable_4bit_bus(struct mmc_card *card) { @@ -970,7 +991,7 @@ static int mmc_sdio_suspend(struct mmc_host *host) mmc_claim_host(host); if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) - sdio_disable_wide(host->card); + sdio_disable_4bit_bus(host->card); if (!mmc_card_keep_power(host)) { mmc_power_off(host); |