[PATCH 3/4][RFC] regmap: add regmap_fields_force_write()

[Kuninori Morimoto]

regmap_fields_force_write() is similar to regmap_fields_write(),
but regmap_fields_force_write() write data to register even though
it is same value.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
 drivers/base/regmap/regmap.c | 12 ++++++++++++
 include/linux/regmap.h       |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index a5bb3fa..c07d74b 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1625,6 +1625,18 @@ int regmap_fields_write(struct regmap_field *field, unsigned int id,
 }
 EXPORT_SYMBOL_GPL(regmap_fields_write);
 
+int regmap_fields_force_write(struct regmap_field *field, unsigned int id,
+			unsigned int val)
+{
+	if (id >= field->id_size)
+		return -EINVAL;
+
+	return regmap_write_bits(field->regmap,
+				  field->reg + (field->id_offset * id),
+				  field->mask, val << field->shift);
+}
+EXPORT_SYMBOL_GPL(regmap_fields_force_write);
+
 /**
  * regmap_fields_update_bits():	Perform a read/modify/write cycle
  *                              on the register field
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index e4b9ad4..519c962 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -505,6 +505,8 @@ int regmap_field_update_bits(struct regmap_field *field,
 
 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,
+			unsigned int val);
 int regmap_fields_read(struct regmap_field *field, unsigned int id,
 		       unsigned int *val);
 int regmap_fields_update_bits(struct regmap_field *field,  unsigned int id,
-- 
1.9.1

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