mfd: Add regulator support for twl6040 VIO, V2V1 supplies

twl6040 has three power supply source:
VBAT needs to be connected to VBAT, VIO, and V2V1.
Add regulator support for the VIO, V2V1 supplies.
Initially handle the two supply together with bulk commands.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

2 files changed, 31 insertions, 4 deletions

diff --git a/drivers/mfd/twl6040-core.c b/drivers/mfd/twl6040-core.c
index 493f4a692747..7a92d95bfb60 100644
--- a/drivers/mfd/twl6040-core.c
+++ b/drivers/mfd/twl6040-core.c
@@ -27,6 +27,7 @@
 #include <linux/types.h>
 #include <linux/slab.h>
 #include <linux/kernel.h>
+#include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
 #include <linux/delay.h>
@@ -35,8 +36,10 @@
 #include <linux/err.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/twl6040.h>
+#include <linux/regulator/consumer.h>
 
 #define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
+#define TWL6040_NUM_SUPPLIES    (2)
 
 int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
 {
@@ -532,6 +535,21 @@ static int __devinit twl6040_probe(struct i2c_client *client,
 
         i2c_set_clientdata(client, twl6040);
 
+        twl6040->supplies[0].supply = "vio";
+        twl6040->supplies[1].supply = "v2v1";
+        ret = regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
+                                 twl6040->supplies);
+        if (ret != 0) {
+                dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
+                goto regulator_get_err;
+        }
+
+        ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+        if (ret != 0) {
+                dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
+                goto power_err;
+        }
+
         twl6040->dev = &client->dev;
         twl6040->irq = client->irq;
         twl6040->irq_base = pdata->irq_base;
@@ -552,13 +570,13 @@ static int __devinit twl6040_probe(struct i2c_client *client,
                 ret = gpio_request_one(twl6040->audpwron, GPIOF_OUT_INIT_LOW,
                                        "audpwron");
                 if (ret)
-                        goto gpio1_err;
+                        goto gpio_err;
         }
 
         /* codec interrupt */
         ret = twl6040_irq_init(twl6040);
         if (ret)
-                goto gpio2_err;
+                goto irq_init_err;
 
         ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY,
                                    NULL, twl6040_naudint_handler, 0,
@@ -618,10 +636,14 @@ mfd_err:
         free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
 irq_err:
         twl6040_irq_exit(twl6040);
-gpio2_err:
+irq_init_err:
         if (gpio_is_valid(twl6040->audpwron))
                 gpio_free(twl6040->audpwron);
-gpio1_err:
+gpio_err:
+        regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+power_err:
+        regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+regulator_get_err:
         i2c_set_clientdata(client, NULL);
 err:
         return ret;
@@ -643,6 +665,9 @@ static int __devexit twl6040_remove(struct i2c_client *client)
         mfd_remove_devices(&client->dev);
         i2c_set_clientdata(client, NULL);
 
+        regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+        regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+
         return 0;
 }
 
diff --git a/include/linux/mfd/twl6040.h b/include/linux/mfd/twl6040.h
index b15b5f03f5c4..6659487c31e7 100644
--- a/include/linux/mfd/twl6040.h
+++ b/include/linux/mfd/twl6040.h
@@ -27,6 +27,7 @@
 
 #include <linux/interrupt.h>
 #include <linux/mfd/core.h>
+#include <linux/regulator/consumer.h>
 
 #define TWL6040_REG_ASICID              0x01
 #define TWL6040_REG_ASICREV             0x02
@@ -203,6 +204,7 @@ struct regmap;
 struct twl6040 {
         struct device *dev;
         struct regmap *regmap;
+        struct regulator_bulk_data supplies[2]; /* supplies for vio, v2v1 */
         struct mutex mutex;
         struct mutex io_mutex;
         struct mutex irq_mutex;