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authorBen Dooks <ben@simtec.co.uk>2009-11-02 16:52:30 +0000
committerSamuel Ortiz <sameo@linux.intel.com>2009-12-13 19:21:36 +0100
commitb45440c33a0bdd824b98e4a4c56767c50d3275eb (patch)
treed4e32150e6de2dd614cd688d22d1371bcc653431 /drivers
parent848369926693778cd0f31bfca7fb951164715b4f (diff)
downloadlinux-linaro-stable-b45440c33a0bdd824b98e4a4c56767c50d3275eb.tar.gz
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')
-rw-r--r--drivers/mfd/tps65010.c28
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