ASoC: wm8903: Expose GPIOs through gpiolib

Also, update platform_data GPIO handling to have an explicit "don't
touch this pin" option.

Add #defines for the GPIO pin functions.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/include/sound/wm8903.h b/include/sound/wm8903.h
index b4a0db2307ef..86172cf4339f 100644
--- a/include/sound/wm8903.h
+++ b/include/sound/wm8903.h
@@ -37,6 +37,21 @@
 #define WM8903_MICBIAS_ENA_WIDTH                     1  /* MICBIAS_ENA */
 
 /*
+ * WM8903_GPn_FN values
+ *
+ * See datasheets for list of valid values per pin
+ */
+#define WM8903_GPn_FN_GPIO_OUTPUT                    0
+#define WM8903_GPn_FN_BCLK                           1
+#define WM8903_GPn_FN_IRQ_OUTPT                      2
+#define WM8903_GPn_FN_GPIO_INPUT                     3
+#define WM8903_GPn_FN_MICBIAS_CURRENT_DETECT         4
+#define WM8903_GPn_FN_MICBIAS_SHORT_DETECT           5
+#define WM8903_GPn_FN_DMIC_LR_CLK_OUTPUT             6
+#define WM8903_GPn_FN_FLL_LOCK_OUTPUT                8
+#define WM8903_GPn_FN_FLL_CLOCK_OUTPUT               9
+
+/*
  * R116 (0x74) - GPIO Control 1
  */
 #define WM8903_GP1_FN_MASK                      0x1F00  /* GP1_FN - [12:8] */
@@ -231,6 +246,8 @@
 #define WM8903_GP5_DB_SHIFT                          0  /* GP5_DB */
 #define WM8903_GP5_DB_WIDTH                          1  /* GP5_DB */
 
+#define WM8903_NUM_GPIO 5
+
 struct wm8903_platform_data {
         bool irq_active_low;   /* Set if IRQ active low, default high */
 
@@ -243,7 +260,8 @@ struct wm8903_platform_data {
 
         int micdet_delay;      /* Delay after microphone detection (ms) */
 
-        u32 gpio_cfg[5];       /* Default register values for GPIO pin mux */
+        int gpio_base;
+        u32 gpio_cfg[WM8903_NUM_GPIO]; /* Default register values for GPIO pin mux */
 };
 
 #endif