ASoC: wm8994: Support custom accessory identification for WM1811A

Allow the user to override the accessory identification code with their
own implementation if the system provides an alternative method.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

2 files changed, 25 insertions, 17 deletions

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 4cd1b6cdb34f..1dcccdbbc8b6 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -3504,15 +3504,20 @@ static void wm1811_mic_work(struct work_struct *work)
 
         dev_dbg(codec->dev, "Starting mic detection\n");
 
-        /*
-         * Start off measument of microphone impedence to find out
-         * what's actually there.
-         */
-        wm8994->mic_detecting = true;
-        wm1811_jackdet_set_mode(codec, WM1811_JACKDET_MODE_MIC);
+        /* Use a user-supplied callback if we have one */
+        if (wm8994->micd_cb) {
+                wm8994->micd_cb(wm8994->micd_cb_data);
+        } else {
+                /*
+                 * Start off measument of microphone impedence to find out
+                 * what's actually there.
+                 */
+                wm8994->mic_detecting = true;
+                wm1811_jackdet_set_mode(codec, WM1811_JACKDET_MODE_MIC);
 
-        snd_soc_update_bits(codec, WM8958_MIC_DETECT_1,
-                            WM8958_MICD_ENA, WM8958_MICD_ENA);
+                snd_soc_update_bits(codec, WM8958_MIC_DETECT_1,
+                                    WM8958_MICD_ENA, WM8958_MICD_ENA);
+        }
 
         mutex_unlock(&wm8994->accdet_lock);
 
@@ -3624,7 +3629,7 @@ static void wm1811_jackdet_bootstrap(struct work_struct *work)
  * detection algorithm.
  */
 int wm8958_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack,
-                      wm8958_micdet_cb cb, void *cb_data)
+                      wm1811_micdet_cb cb, void *cb_data)
 {
         struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);
         struct wm8994 *control = wm8994->wm8994;
@@ -3639,17 +3644,18 @@ int wm8958_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack,
         }
 
         if (jack) {
-                /* No longer supported */
-                if (cb)
-                        return -EINVAL;
-
                 snd_soc_dapm_force_enable_pin(&codec->dapm, "CLK_SYS");
                 snd_soc_dapm_sync(&codec->dapm);
 
                 wm8994->micdet[0].jack = jack;
 
-                wm8994->mic_detecting = true;
-                wm8994->jack_mic = false;
+                if (cb) {
+                        wm8994->micd_cb = cb;
+                        wm8994->micd_cb_data = cb_data;
+                } else {
+                        wm8994->mic_detecting = true;
+                        wm8994->jack_mic = false;
+                }
 
                 wm8958_micd_set_rate(codec);
 
diff --git a/sound/soc/codecs/wm8994.h b/sound/soc/codecs/wm8994.h
index f5546f242ab1..1a6bb4ed08f8 100644
--- a/sound/soc/codecs/wm8994.h
+++ b/sound/soc/codecs/wm8994.h
@@ -39,12 +39,12 @@ enum wm8994_vmid_mode {
         WM8994_VMID_FORCE,
 };
 
-typedef void (*wm8958_micdet_cb)(u16 status, void *data);
+typedef void (*wm1811_micdet_cb)(void *data);
 
 int wm8994_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack,
                       int micbias);
 int wm8958_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack,
-                      wm8958_micdet_cb cb, void *cb_data);
+                      wm1811_micdet_cb cb, void *cb_data);
 
 int wm8994_vmid_mode(struct snd_soc_codec *codec, enum wm8994_vmid_mode mode);
 
@@ -138,6 +138,8 @@ struct wm8994_priv {
         struct delayed_work jackdet_bootstrap;
 
         int micdet_irq;
+        wm1811_micdet_cb micd_cb;
+        void *micd_cb_data;
 
         int revision;