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Subject[PATCH 2/2] twl-regulator: make TWL4030_ALLOW_UNSUPPORTED more configurable.
The regulators in the twl4030 can provide some voltage settings
that are not offically supported.
These settings are disabled by default, but can be enabled with
CONFIG_TWL4030_ALLOW_UNSUPPORTED=y
However
- that config variable is not mentioned in any Kconfig so cannot
be used, and
- a global setting is clumsy - a per regulator setting would be
better.

So define a new 'feature' flag that a board file can set to enable
these unsupported volatages for boards which need them.

This flag cannot (yet) be set using device-tree.

Signed-off-by: NeilBrown <neilb@suse.de>
---
drivers/regulator/twl-regulator.c | 12 +++++-------
include/linux/i2c/twl.h | 5 +++++
2 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/drivers/regulator/twl-regulator.c b/drivers/regulator/twl-regulator.c
index 9cdfc38..03a316d 100644
--- a/drivers/regulator/twl-regulator.c
+++ b/drivers/regulator/twl-regulator.c
@@ -388,14 +388,12 @@ static int twl6030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
* VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
* TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
*/
-#ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
-#define UNSUP_MASK 0x0000
-#else
#define UNSUP_MASK 0x8000
-#endif

#define UNSUP(x) (UNSUP_MASK | (x))
-#define IS_UNSUP(x) (UNSUP_MASK & (x))
+#define IS_UNSUP(info, x) \
+ ((UNSUP_MASK & (x)) && \
+ !((info)->features & TWL4030_ALLOW_UNSUPPORTED))
#define LDO_MV(x) (~UNSUP_MASK & (x))


@@ -469,7 +467,7 @@ static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
struct twlreg_info *info = rdev_get_drvdata(rdev);
int mV = info->table[index];

- return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
+ return IS_UNSUP(info, mV) ? 0 : (LDO_MV(mV) * 1000);
}

static int
@@ -483,7 +481,7 @@ twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
int mV = info->table[vsel];
int uV;

- if (IS_UNSUP(mV))
+ if (IS_UNSUP(info, mV))
continue;
uV = LDO_MV(mV) * 1000;

diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index 88e8cd8..8eec440 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -752,6 +752,11 @@ struct twl_regulator_driver_data {
#define TWL5031 BIT(2) /* twl5031 has different registers */
#define TWL6030_CLASS BIT(3) /* TWL6030 class */
#define TWL6025_SUBCLASS BIT(4) /* TWL6025 has changed registers */
+#define TWL4030_ALLOW_UNSUPPORTED BIT(5) /* Some voltages are possible
+ * but not officially supported.
+ * This flag is necessary to
+ * enable them.
+ */

/*----------------------------------------------------------------------*/




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