linux-kernel - [PATCH 06/15 v2][RFC] regmap: add regmap_field_update_bits

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Date:	Mon, 15 Feb 2016 05:23:55 +0000
From:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:	Mark Brown <broonie@...nel.org>,
	Greg KH <gregkh@...uxfoundation.org>
CC:	Linux-Kernel <linux-kernel@...r.kernel.org>,
	Linux-ALSA <alsa-devel@...a-project.org>
Subject: [PATCH 06/15 v2][RFC] regmap: add regmap_field_update_bits_base()


From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>

This patch adds new regmap_field_update_bits_base() which is using
regmap_update_bits_base().
Current regmap_field_xxx() can be merged into it by macro.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
---
 drivers/base/regmap/regmap.c | 27 +++++++++++++++++++++++++++
 include/linux/regmap.h       | 12 +++++++++++-
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 015135a..e534105 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1690,6 +1690,33 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
 EXPORT_SYMBOL_GPL(regmap_raw_write);
 
 /**
+ * regmap_field_update_bits_base():
+ *	Perform a read/modify/write cycle on the register field
+ *	with change, async, force option
+ *
+ * @field: Register field to write to
+ * @mask: Bitmask to change
+ * @val: Value to be written
+ * @change: Boolean indicating if a write was done
+ * @async: Boolean indicating asynchronously
+ * @force: Boolean indicating use force update
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_field_update_bits_base(struct regmap_field *field,
+				  unsigned int mask, unsigned int val,
+				  bool *change, bool async, bool force)
+{
+	mask = (mask << field->shift) & field->mask;
+
+	return regmap_update_bits_base(field->regmap, field->reg,
+				       mask, val << field->shift,
+				       change, async, force);
+}
+EXPORT_SYMBOL_GPL(regmap_field_update_bits_base);
+
+/**
  * regmap_field_write(): Write a value to a single register field
  *
  * @field: Register field to write to
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 4d8e1ed..23bf765 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -773,9 +773,11 @@ void devm_regmap_field_free(struct device *dev,	struct regmap_field *field);
 
 int regmap_field_read(struct regmap_field *field, unsigned int *val);
 int regmap_field_write(struct regmap_field *field, unsigned int val);
+int regmap_field_update_bits_base(struct regmap_field *field,
+				  unsigned int mask, unsigned int val,
+				  bool *change, bool async, bool force);
 int regmap_field_update_bits(struct regmap_field *field,
 			     unsigned int mask, unsigned int val);
-
 int regmap_fields_write(struct regmap_field *field, unsigned int id,
 			unsigned int val);
 int regmap_fields_force_write(struct regmap_field *field, unsigned int id,
@@ -954,6 +956,14 @@ static inline int regmap_write_bits(struct regmap *map, unsigned int reg,
 	return -EINVAL;
 }
 
+static inline int regmap_field_update_bits_base(struct regmap_field *field,
+					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_get_val_bytes(struct regmap *map)
 {
 	WARN_ONCE(1, "regmap API is disabled");
-- 
1.9.1