Commit b45440c3 authored by Ben Dooks's avatar Ben Dooks Committed by Samuel Ortiz
Browse files

mfd: Allow configuration of VDCDC2 for tps65010 



Add function to allow the configuation fo the VDCDC2 register by
external users, to allow changing of the standard and low-power
running modes.

This is needed, for example, for the Simtec IM2440D20 where we need
to use the low-power mode to shutdown the LDO/DCDC that are not needed
during suspend (saving substantial power) and the runtime use of the
low-power mode to change VCore.

Signed-off-by: default avatarBen Dooks <ben@simtec.co.uk>
Signed-off-by: default avatarSimtec Linux Team <linux@simtec.co.uk>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 84836992

drivers/mfd/tps65010.c

+28 −0
Original line number Diff line number Diff line
@@ -964,6 +964,34 @@ int tps65010_config_vregs1(unsigned value) 
}

EXPORT_SYMBOL(tps65010_config_vregs1);



int tps65010_config_vdcdc2(unsigned value)

{

	struct i2c_client *c;

	int	 status;



	if (!the_tps)

		return -ENODEV;



	c = the_tps->client;

	mutex_lock(&the_tps->lock);



	pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,

		 i2c_smbus_read_byte_data(c, TPS_VDCDC2));



	status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);



	if (status != 0)

		printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",

			DRIVER_NAME);

	else

		pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,

			 i2c_smbus_read_byte_data(c, TPS_VDCDC2));



	mutex_unlock(&the_tps->lock);

	return status;

}

EXPORT_SYMBOL(tps65010_config_vdcdc2);



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

/* tps65013_set_low_pwr parameter:

 * mode: ON or OFF

include/linux/i2c/tps65010.h

+19 −0
Original line number Diff line number Diff line
@@ -72,6 +72,21 @@ 
#define	TPS_VDCDC1		0x0c

#	define	TPS_ENABLE_LP		(1 << 3)

#define	TPS_VDCDC2		0x0d

#	define	TPS_LP_COREOFF	(1 << 7)

#	define 	TPS_VCORE_1_8V	(7<<4)

#	define 	TPS_VCORE_1_5V	(6 << 4)

#	define 	TPS_VCORE_1_4V	(5 << 4)

#	define 	TPS_VCORE_1_3V	(4 << 4)

#	define 	TPS_VCORE_1_2V	(3 << 4)

#	define 	TPS_VCORE_1_1V	(2 << 4)

#	define 	TPS_VCORE_1_0V	(1 << 4)

#	define 	TPS_VCORE_0_85V	(0 << 4)

#	define	TPS_VCORE_LP_1_2V (3 << 2)

#	define	TPS_VCORE_LP_1_1V (2 << 2)

#	define	TPS_VCORE_LP_1_0V (1 << 2)

#	define	TPS_VCORE_LP_0_85V (0 << 2)

#	define	TPS_VIB		(1 << 1)

#	define	TPS_VCORE_DISCH	(1 << 0)

#define	TPS_VREGS1		0x0e

#	define	TPS_LDO2_ENABLE	(1 << 7)

#	define	TPS_LDO2_OFF	(1 << 6)
@@ -152,6 +167,10 @@ extern int tps65010_config_vregs1(unsigned value); 
 */

extern int tps65013_set_low_pwr(unsigned mode);



/* tps65010_set_vdcdc2

 *  value to be written to VDCDC2

 */

extern int tps65010_config_vdcdc2(unsigned value);



struct i2c_client;

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