From b69837a59461d6f7ca557d978d02734bcdb60f35 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Mon, 23 Feb 2009 18:14:26 +0000 Subject: [PATCH] mach-omap2/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 Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/mmc-twl4030.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/arch/arm/mach-omap2/mmc-twl4030.c b/arch/arm/mach-omap2/mmc-twl4030.c index 38a7c5ef101..33e5b9b7da4 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, -- 2.41.0