diff options
| author | David Brownell <dbrownell@users.sourceforge.net> | 2009-03-24 04:23:48 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2009-03-24 04:51:23 +0300 |
| commit | 034ae7b41720a26cadd4b2f02bf0b23e79240344 (patch) | |
| tree | d38884c588e3c0ebd18f3f7a8078c69d325c9da0 | |
| parent | 07d83cc9c839a5f05c7c1b6d823a8f483bda0441 (diff) | |
| download | linux-034ae7b41720a26cadd4b2f02bf0b23e79240344.tar.xz | |
ARM: OMAP3: mmc-twl4030 fix for vmmc = 0
Resolve longstanding issue noted by Adrian Hunter: confusion
between settting VSEL=0 (which is 1.8V on MMC1) and poweroff.
Also, leave VSEL alone if we're just powering the regulator off.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
| -rw-r--r-- | arch/arm/mach-omap2/mmc-twl4030.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/arch/arm/mach-omap2/mmc-twl4030.c b/arch/arm/mach-omap2/mmc-twl4030.c index d9fad8dda152..d43421400e9d 100644 --- a/arch/arm/mach-omap2/mmc-twl4030.c +++ b/arch/arm/mach-omap2/mmc-twl4030.c @@ -178,7 +178,10 @@ static int twl_mmc_resume(struct device *dev, int slot) static int twl_mmc_set_voltage(struct twl_mmc_controller *c, int vdd) { int ret; - u8 vmmc, dev_grp_val; + u8 vmmc = 0, dev_grp_val; + + if (!vdd) + goto doit; if (c->twl_vmmc_dev_grp == VMMC1_DEV_GRP) { /* VMMC1: max 220 mA. And for 8-bit mode, @@ -203,8 +206,7 @@ static int twl_mmc_set_voltage(struct twl_mmc_controller *c, int vdd) /* error if VSIM needed */ break; default: - vmmc = 0; - break; + return -EINVAL; } } else if (c->twl_vmmc_dev_grp == VMMC2_DEV_GRP) { /* VMMC2: max 100 mA */ @@ -230,21 +232,21 @@ static int twl_mmc_set_voltage(struct twl_mmc_controller *c, int vdd) vmmc = VMMC2_315V; break; default: - vmmc = 0; - break; + return -EINVAL; } } else { - return 0; + return -EINVAL; } - if (vmmc) +doit: + if (vdd) dev_grp_val = VMMC_DEV_GRP_P1; /* Power up */ else dev_grp_val = LDO_CLR; /* Power down */ ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, dev_grp_val, c->twl_vmmc_dev_grp); - if (ret) + if (ret || !vdd) return ret; ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, |