From 2230c49f09b552454eac51b81e9e4e41060b5e70 Mon Sep 17 00:00:00 2001
From: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Date: Fri, 13 May 2016 16:45:18 +0100
Subject: ASoC: arizona: Add a notifier chain for CODEC events

Add a notifier chain that can be used from the machine driver to catch
events generated by the CODEC.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 include/linux/mfd/arizona/core.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'include/linux/mfd')

diff --git a/include/linux/mfd/arizona/core.h b/include/linux/mfd/arizona/core.h
index d55a42297d49..58ab4c0fe761 100644
--- a/include/linux/mfd/arizona/core.h
+++ b/include/linux/mfd/arizona/core.h
@@ -14,6 +14,7 @@
 #define _WM_ARIZONA_CORE_H
 
 #include <linux/interrupt.h>
+#include <linux/notifier.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/mfd/arizona/pdata.h>
@@ -148,8 +149,17 @@ struct arizona {
 	uint16_t dac_comp_coeff;
 	uint8_t dac_comp_enabled;
 	struct mutex dac_comp_lock;
+
+	struct blocking_notifier_head notifier;
 };
 
+static inline int arizona_call_notifiers(struct arizona *arizona,
+					 unsigned long event,
+					 void *data)
+{
+	return blocking_notifier_call_chain(&arizona->notifier, event, data);
+}
+
 int arizona_clk32k_enable(struct arizona *arizona);
 int arizona_clk32k_disable(struct arizona *arizona);
 
-- 
cgit