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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: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Simtec Linux Team <linux@simtec.co.uk>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Ben Dooks 2009-11-02 16:52:30 +00:00 committed by Samuel Ortiz
parent 8483699266
commit b45440c33a
2 changed files with 47 additions and 0 deletions
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28
drivers/mfd/tps65010.c
View File

@ -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

19
include/linux/i2c/tps65010.h
View File

@ -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;