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>

diff --git a/drivers/mfd/tps65010.c b/drivers/mfd/tps65010.c
index 755c403..e595530 100644 (file)
--- 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

diff --git a/include/linux/i2c/tps65010.h b/include/linux/i2c/tps65010.h
index 918c535..08aa922 100644 (file)
--- a/include/linux/i2c/tps65010.h
+++ b/include/linux/i2c/tps65010.h
@@ -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;