omap: RX51: Remux to pull eMMC lines down when powering off

It has been discovered that, when eMMC is powered off, current
will flow from OMAP eMMC data pull-ups to the eMMC voltage supply.
Configuring pads for OMAP off-mode does not help because eMMC is
powered off independently of OMAP off-mode.  Hence the pads are
now re-configured when eMMC is powered on or off.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index cc7e77f09268..4a05c3722d54 100644
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -48,6 +48,9 @@ static void hsmmc1_before_set_reg(struct device *dev, int slot,
         u32 reg, prog_io;
         struct omap_mmc_platform_data *mmc = dev->platform_data;
 
+        if (mmc->slots[0].remux)
+                mmc->slots[0].remux(dev, slot, power_on);
+
         /*
          * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
          * card with Vcc regulator (from twl4030 or whatever).  OMAP has both
@@ -121,6 +124,9 @@ static void hsmmc23_before_set_reg(struct device *dev, int slot,
 {
         struct omap_mmc_platform_data *mmc = dev->platform_data;
 
+        if (mmc->slots[0].remux)
+                mmc->slots[0].remux(dev, slot, power_on);
+
         if (power_on) {
                 /* Only MMC2 supports a CLKIN */
                 if (mmc->slots[0].internal_clock) {
@@ -185,6 +191,8 @@ void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
                 mmc->slots[0].switch_pin = c->gpio_cd;
                 mmc->slots[0].gpio_wp = c->gpio_wp;
 
+                mmc->slots[0].remux = c->remux;
+
                 if (c->cover_only)
                         mmc->slots[0].cover = 1;