From 91d31b9f8e7662726f273fc32b25f4099d78de4a Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Mon, 15 Feb 2016 05:22:18 +0000
Subject: [PATCH] regmap: add regmap_update_bits_base()

Current regmap has many similar update functions like below,
but the difference is very few.
	regmap_update_bits()
	regmap_update_bits_async()
	regmap_update_bits_check()
	regmap_update_bits_check_async()
Furthermore, we can add *force* write option too in the future.

This patch adds new regmap_update_bits_base() which is feature
merged function. Above functions can be merged into it by macro.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/base/regmap/regmap.c | 40 ++++++++++++++++++++++++++++++++++++
 include/linux/regmap.h       | 11 ++++++++++
 2 files changed, 51 insertions(+)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index ee54e841de4a..4e35b2f41304 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -2647,6 +2647,46 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
 	return ret;
 }
 
+/**
+ * regmap_update_bits_base:
+ *	Perform a read/modify/write cycle on the
+ *	register map with change, async, force option
+ *
+ * @map: Register map to update
+ * @reg: Register to update
+ * @mask: Bitmask to change
+ * @val: New value for bitmask
+ * @change: Boolean indicating if a write was done
+ * @async: Boolean indicating asynchronously
+ * @force: Boolean indicating use force update
+ *
+ * if async was true,
+ * With most buses the read must be done synchronously so this is most
+ * useful for devices with a cache which do not need to interact with
+ * the hardware to determine the current register value.
+ *
+ * Returns zero for success, a negative number on error.
+ */
+int regmap_update_bits_base(struct regmap *map, unsigned int reg,
+			    unsigned int mask, unsigned int val,
+			    bool *change, bool async, bool force)
+{
+	int ret;
+
+	map->lock(map->lock_arg);
+
+	map->async = async;
+
+	ret = _regmap_update_bits(map, reg, mask, val, change, force);
+
+	map->async = false;
+
+	map->unlock(map->lock_arg);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_update_bits_base);
+
 /**
  * regmap_update_bits: Perform a read/modify/write cycle on the register map
  *
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 18394343f489..28e50a3d2872 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -691,6 +691,9 @@ int regmap_raw_read(struct regmap *map, unsigned int reg,
 		    void *val, size_t val_len);
 int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
 		     size_t val_count);
+int regmap_update_bits_base(struct regmap *map, unsigned int reg,
+			    unsigned int mask, unsigned int val,
+			    bool *change, bool async, bool force);
 int regmap_update_bits(struct regmap *map, unsigned int reg,
 		       unsigned int mask, unsigned int val);
 int regmap_write_bits(struct regmap *map, unsigned int reg,
@@ -937,6 +940,14 @@ static inline int regmap_bulk_read(struct regmap *map, unsigned int reg,
 	return -EINVAL;
 }
 
+static inline int regmap_update_bits_base(struct regmap *map, unsigned int reg,
+					  unsigned int mask, unsigned int val,
+					  bool *change, bool async, bool force)
+{
+	WARN_ONCE(1, "regmap API is disabled");
+	return -EINVAL;
+}
+
 static inline int regmap_update_bits(struct regmap *map, unsigned int reg,
 				     unsigned int mask, unsigned int val)
 {