diff options
| author | Ben Dooks <ben@simtec.co.uk> | 2009-11-02 16:52:30 +0000 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2009-12-13 19:21:36 +0100 |
| commit | b45440c33a0bdd824b98e4a4c56767c50d3275eb (patch) | |
| tree | d4e32150e6de2dd614cd688d22d1371bcc653431 /drivers/mfd | |
| parent | 848369926693778cd0f31bfca7fb951164715b4f (diff) | |
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>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/tps65010.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/mfd/tps65010.c b/drivers/mfd/tps65010.c index 755c4030ea31..e5955306c2fa 100644 --- a/drivers/mfd/tps65010.c +++ b/drivers/mfd/tps65010.c @@ -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 |