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| author | Sonic Zhang <sonic.zhang@analog.com> | 2012-08-08 00:15:20 -0400 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2012-09-04 13:58:20 -0400 |
| commit | 7a8a43c46a4c91475ff93eb00897cbbc5ec98874 (patch) | |
| tree | da27aaada296d4ead1485cc86f519210a803c090 /drivers/mmc/host/bfin_sdh.c | |
| parent | c5e4a2e4c6fe47d88a1b172e54ed47a463f0ce45 (diff) | |
| download | linux-7a8a43c46a4c91475ff93eb00897cbbc5ec98874.tar.gz linux-7a8a43c46a4c91475ff93eb00897cbbc5ec98874.tar.bz2 linux-7a8a43c46a4c91475ff93eb00897cbbc5ec98874.zip | |
mmc: bfin_sdh: Reset SD controller when resume from power saving mode.
Without reset, SD controller may stay in disable mode, SD card can't
be detected when resume from power saving mode.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/bfin_sdh.c')
| -rw-r--r-- | drivers/mmc/host/bfin_sdh.c | 35 |
1 files changed, 19 insertions, 16 deletions
diff --git a/drivers/mmc/host/bfin_sdh.c b/drivers/mmc/host/bfin_sdh.c index 7776614fb2a5..b9b463eca1ec 100644 --- a/drivers/mmc/host/bfin_sdh.c +++ b/drivers/mmc/host/bfin_sdh.c @@ -505,6 +505,23 @@ static irqreturn_t sdh_stat_irq(int irq, void *devid) return IRQ_RETVAL(handled); } +static void sdh_reset(void) +{ +#if defined(CONFIG_BF54x) + /* Secure Digital Host shares DMA with Nand controller */ + bfin_write_DMAC1_PERIMUX(bfin_read_DMAC1_PERIMUX() | 0x1); +#endif + + bfin_write_SDH_CFG(bfin_read_SDH_CFG() | CLKS_EN); + SSYNC(); + + /* Disable card inserting detection pin. set MMC_CAP_NEEDS_POLL, and + * mmc stack will do the detection. + */ + bfin_write_SDH_CFG((bfin_read_SDH_CFG() & 0x1F) | (PUP_SDDAT | PUP_SDDAT3)); + SSYNC(); +} + static int __devinit sdh_probe(struct platform_device *pdev) { struct mmc_host *mmc; @@ -581,19 +598,8 @@ static int __devinit sdh_probe(struct platform_device *pdev) dev_err(&pdev->dev, "unable to request peripheral pins\n"); goto out4; } -#if defined(CONFIG_BF54x) - /* Secure Digital Host shares DMA with Nand controller */ - bfin_write_DMAC1_PERIMUX(bfin_read_DMAC1_PERIMUX() | 0x1); -#endif - bfin_write_SDH_CFG(bfin_read_SDH_CFG() | CLKS_EN); - SSYNC(); - - /* Disable card inserting detection pin. set MMC_CAP_NEEDS_POLL, and - * mmc stack will do the detection. - */ - bfin_write_SDH_CFG((bfin_read_SDH_CFG() & 0x1F) | (PUP_SDDAT | PUP_SDDAT3)); - SSYNC(); + sdh_reset(); mmc_add_host(mmc); return 0; @@ -660,10 +666,7 @@ static int sdh_resume(struct platform_device *dev) return ret; } -#if defined(CONFIG_BF54x) - /* Secure Digital Host shares DMA with Nand controller */ - bfin_write_DMAC1_PERIMUX(bfin_read_DMAC1_PERIMUX() | 0x1); -#endif + sdh_reset(); if (mmc) ret = mmc_resume_host(mmc); |