1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/include/mach/audio.h b/arch/arm/mach-pxa/include/mach/audio.h
index f82f96dd1053..16eb02552d5d 100644
--- a/arch/arm/mach-pxa/include/mach/audio.h
+++ b/arch/arm/mach-pxa/include/mach/audio.h
@@ -4,12 +4,22 @@
 #include <sound/core.h>
 #include <sound/pcm.h>
 
+/*
+ * @reset_gpio: AC97 reset gpio (normally gpio113 or gpio95)
+ *              a -1 value means no gpio will be used for reset
+
+ * reset_gpio should only be specified for pxa27x CPUs where a silicon
+ * bug prevents correct operation of the reset line. If not specified,
+ * the default behaviour on these CPUs is to consider gpio 113 as the
+ * AC97 reset line, which is the default on most boards.
+ */
 typedef struct {
 	int (*startup)(struct snd_pcm_substream *, void *);
 	void (*shutdown)(struct snd_pcm_substream *, void *);
 	void (*suspend)(void *);
 	void (*resume)(void *);
 	void *priv;
+	int reset_gpio;
 } pxa2xx_audio_ops_t;
 
 extern void pxa_set_ac97_info(pxa2xx_audio_ops_t *ops);