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authorBartosz Golaszewski <bgolaszewski@baylibre.com>2020-05-28 17:45:02 +0200
committerMark Brown <broonie@kernel.org>2020-05-29 14:00:42 +0100
commitaa2ff9dbaeddabb5ad166db5f9f1a0580a8bbba8 (patch)
tree5c710c63c6e650e003dfd8e6ed088e3149fd984f /drivers/base
parent8f3d9f354286745c751374f5f1fcafee6b3f3136 (diff)
downloadlinux-aa2ff9dbaeddabb5ad166db5f9f1a0580a8bbba8.tar.bz2
regmap: provide helpers for simple bit operations
In many instances regmap_update_bits() is used for simple bit setting and clearing. In these cases the last argument is redundant and we can hide it with a static inline function. This adds three new helpers for simple bit operations: set_bits, clear_bits and test_bits (the last one defined as a regular function). Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Link: https://lore.kernel.org/r/20200528154503.26304-2-brgl@bgdev.pl Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/regmap/regmap.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 59f911e57719..4ad5c5adc0a3 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -2936,6 +2936,28 @@ int regmap_update_bits_base(struct regmap *map, unsigned int reg,
}
EXPORT_SYMBOL_GPL(regmap_update_bits_base);
+/**
+ * regmap_test_bits() - Check if all specified bits are set in a register.
+ *
+ * @map: Register map to operate on
+ * @reg: Register to read from
+ * @bits: Bits to test
+ *
+ * Returns -1 if the underlying regmap_read() fails, 0 if at least one of the
+ * tested bits is not set and 1 if all tested bits are set.
+ */
+int regmap_test_bits(struct regmap *map, unsigned int reg, unsigned int bits)
+{
+ unsigned int val, ret;
+
+ ret = regmap_read(map, reg, &val);
+ if (ret)
+ return ret;
+
+ return (val & bits) == bits;
+}
+EXPORT_SYMBOL_GPL(regmap_test_bits);
+
void regmap_async_complete_cb(struct regmap_async *async, int ret)
{
struct regmap *map = async->map;