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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2013-09-01 20:24:50 -0700
committerMark Brown <broonie@linaro.org>2013-09-17 00:12:23 +0100
commitfdf200290581150f7b69148abf6ca860684cbfbb (patch)
tree704fcc316e72e34ffc81dda2bf150ed1aa610bcb /drivers/base/regmap/regmap.c
parent272b98c6455f00884f0350f775c5342358ebb73f (diff)
downloadlinux-linaro-stable-fdf200290581150f7b69148abf6ca860684cbfbb.tar.gz
regmap: add regmap_field_update_bits()
Current regmap_field is supporting read/write functions. This patch adds new update_bits function for it. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/base/regmap/regmap.c')
-rw-r--r--drivers/base/regmap/regmap.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 7d689a15c500..285afa7470c0 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1369,6 +1369,26 @@ int regmap_field_write(struct regmap_field *field, unsigned int val)
}
EXPORT_SYMBOL_GPL(regmap_field_write);
+/**
+ * regmap_field_update_bits(): Perform a read/modify/write cycle
+ * on the register field
+ *
+ * @field: Register field to write to
+ * @mask: Bitmask to change
+ * @val: Value to be written
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_field_update_bits(struct regmap_field *field, unsigned int mask, unsigned int val)
+{
+ mask = (mask << field->shift) & field->mask;
+
+ return regmap_update_bits(field->regmap, field->reg,
+ mask, val << field->shift);
+}
+EXPORT_SYMBOL_GPL(regmap_field_update_bits);
+
/*
* regmap_bulk_write(): Write multiple registers to the device
*