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authorAdrian Hunter <adrian.hunter@nokia.com>2010-02-15 10:03:34 -0800
committerTony Lindgren <tony@atomide.com>2010-02-15 10:03:34 -0800
commitce6f00165d5314698afd04ee20cede156cfcc593 (patch)
treed7df468cf7143cdb99917b5de25a923c4abc2807 /arch/arm/mach-omap2/hsmmc.c
parente3df0fb4132fff8717cb0c08403c12138fd3ae39 (diff)
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>
Diffstat (limited to 'arch/arm/mach-omap2/hsmmc.c')
-rw-r--r--arch/arm/mach-omap2/hsmmc.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index cc7e77f0926..4a05c3722d5 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;