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regulator: twl: fix twl6030 enable/disable

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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)>
This commit is contained in:
Saquib Herman 2011-04-01 10:22:42 +05:30 committed by Liam Girdwood
parent f0f060bdd5
commit 21657ebf86
1 changed files with 30 additions and 1 deletions
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31
drivers/regulator/twl-regulator.c
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@ -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)