mfd: twl6040: Add twl6040-gpio child

Add needed platform data structure and code to be able to load
the GPO child of twl6040.
Update the devicetree binding documentation at the same time.

Signed-off-by: Sergio Aguirre <saaguirre@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/include/linux/mfd/twl6040.h b/include/linux/mfd/twl6040.h
index 269b7067d360..8991532d4391 100644
--- a/include/linux/mfd/twl6040.h
+++ b/include/linux/mfd/twl6040.h
@@ -158,7 +158,7 @@
 #define TWL6040_VIBROCDET               0x20
 #define TWL6040_TSHUTDET                0x40
 
-#define TWL6040_CELLS                   2
+#define TWL6040_CELLS                   3
 
 #define TWL6040_REV_ES1_0               0x00
 #define TWL6040_REV_ES1_1               0x01 /* Rev ES1.1 and ES1.2 */
@@ -176,6 +176,8 @@
 #define TWL6040_SYSCLK_SEL_LPPLL        0
 #define TWL6040_SYSCLK_SEL_HPPLL        1
 
+#define TWL6040_GPO_MAX 3
+
 struct twl6040_codec_data {
         u16 hs_left_step;
         u16 hs_right_step;
@@ -192,12 +194,17 @@ struct twl6040_vibra_data {
         int vddvibr_uV;                 /* VDDVIBR volt, set 0 for fixed reg */
 };
 
+struct twl6040_gpo_data {
+        int gpio_base;
+};
+
 struct twl6040_platform_data {
         int audpwron_gpio;      /* audio power-on gpio */
         unsigned int irq_base;
 
         struct twl6040_codec_data *codec;
         struct twl6040_vibra_data *vibra;
+        struct twl6040_gpo_data *gpo;
 };
 
 struct regmap;