diff options
| author | Saquib Herman <saquib@ti.com> | 2011-04-01 08:52:42 +0400 |
|---|---|---|
| committer | Liam Girdwood <lrg@slimlogic.co.uk> | 2011-05-27 13:34:36 +0400 |
| commit | 21657ebf868b9c7c6c0cab15a6797c3f1af64295 (patch) | |
| tree | d97474e12913d7bf01b9b04c6b4d0312fcfccf64 /drivers/regulator | |
| parent | f0f060bdd55e36adff4cc80b2a4ed026774db7a9 (diff) | |
| download | linux-21657ebf868b9c7c6c0cab15a6797c3f1af64295.tar.xz | |
regulator: twl: fix twl6030 enable/disable
TWL6030 requires an additional register write to CFG_STATE register
to explicitly state that the regulator is in a certain state. Merely
associating the regulator with the group is not enough. Add the
required register field definitions and fix the handling for
TWL6030 enable/disable.
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Saquib Herman <saquib@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@vega.(none)>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/twl-regulator.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/regulator/twl-regulator.c b/drivers/regulator/twl-regulator.c index 6a292852a358..2c6660583769 100644 --- a/drivers/regulator/twl-regulator.c +++ b/drivers/regulator/twl-regulator.c @@ -76,6 +76,11 @@ struct twlreg_info { #define VREG_BC_PROC 3 #define VREG_BC_CLK_RST 4 +/* TWL6030 LDO register values for CFG_STATE */ +#define TWL6030_CFG_STATE_OFF 0x00 +#define TWL6030_CFG_STATE_ON 0x01 +#define TWL6030_CFG_STATE_GRP_SHIFT 5 + static inline int twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset) { @@ -149,6 +154,11 @@ static int twlreg_enable(struct regulator_dev *rdev) ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp); + if (!ret && twl_class_is_6030()) + ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, + grp << TWL6030_CFG_STATE_GRP_SHIFT | + TWL6030_CFG_STATE_ON); + udelay(info->delay); return ret; @@ -158,17 +168,36 @@ static int twlreg_disable(struct regulator_dev *rdev) { struct twlreg_info *info = rdev_get_drvdata(rdev); int grp; + int ret; grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP); if (grp < 0) return grp; + /* For 6030, set the off state for all grps enabled */ + if (twl_class_is_6030()) { + ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, + (grp & (P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030)) << + TWL6030_CFG_STATE_GRP_SHIFT | + TWL6030_CFG_STATE_OFF); + if (ret) + return ret; + } + if (twl_class_is_4030()) grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030); else grp &= ~(P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030); - return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp); + ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp); + + /* Next, associate cleared grp in state register */ + if (!ret && twl_class_is_6030()) + ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, + grp << TWL6030_CFG_STATE_GRP_SHIFT | + TWL6030_CFG_STATE_OFF); + + return ret; } static int twlreg_get_status(struct regulator_dev *rdev) |