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>
diff --git a/drivers/mmc/host/bfin_sdh.c b/drivers/mmc/host/bfin_sdh.c
index 7776614..b9b463e 100644
--- a/drivers/mmc/host/bfin_sdh.c
+++ b/drivers/mmc/host/bfin_sdh.c
@@ -505,6 +505,23 @@
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 @@
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 @@
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);
