ASoC: Allow configuration of WM8904 GPIO pin functions

Provide platform data allowing the configuration of the GPIO pins
on the WM8904 to be selected, allowing alternate functions to be
enabled.

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

1 files changed, 12 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c
index 593e47d0e0eb..ce3f004217ae 100644
--- a/sound/soc/codecs/wm8904.c
+++ b/sound/soc/codecs/wm8904.c
@@ -2425,6 +2425,7 @@ EXPORT_SYMBOL_GPL(soc_codec_dev_wm8904);
 static int wm8904_register(struct wm8904_priv *wm8904,
                            enum snd_soc_control_type control)
 {
+        struct wm8904_pdata *pdata = wm8904->pdata;
         int ret;
         struct snd_soc_codec *codec = &wm8904->codec;
         int i;
@@ -2530,6 +2531,17 @@ static int wm8904_register(struct wm8904_priv *wm8904,
                 WM8904_LINEOUTRZC;
         wm8904->reg_cache[WM8904_CLOCK_RATES_0] &= ~WM8904_SR_MODE;
 
+        /* Apply configuration from the platform data. */
+        if (wm8904->pdata) {
+                for (i = 0; i < WM8904_GPIO_REGS; i++) {
+                        if (!pdata->gpio_cfg[i])
+                                continue;
+
+                        wm8904->reg_cache[WM8904_GPIO_CONTROL_1 + i]
+                                = pdata->gpio_cfg[i] & 0xffff;
+                }
+        }
+
         /* Set Class W by default - this will be managed by the Class
          * G widget at runtime where bypass paths are available.
          */