Commit 411a2df5 authored by NeilBrown's avatar NeilBrown Committed by Mark Brown
Browse files

regulator: 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: default avatarNeilBrown <neilb@suse.de>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent c30540d7

drivers/regulator/twl-regulator.c

+4 −6
Original line number Diff line number Diff line
@@ -395,14 +395,12 @@ 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))
@@ -476,7 +474,7 @@ 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

include/linux/i2c/twl.h

+5 −0
Original line number Diff line number Diff line
@@ -762,6 +762,11 @@ 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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