[PATCH 1/2] regmap: provide helpers for simple bit operations
From: Bartosz Golaszewski <hidden>
Date: 2020-05-28 12:35:26
Also in:
linux-mediatek, lkml, netdev
Subsystem:
register map abstraction, the rest · Maintainers:
Mark Brown, Linus Torvalds
From: Bartosz Golaszewski <redacted> 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 macro. This adds three new macros for simple bit operations: set_bits, clear_bits and test_bits. Signed-off-by: Bartosz Golaszewski <redacted> --- include/linux/regmap.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 40b07168fd8e..6ef829169f36 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h@@ -71,6 +71,24 @@ struct reg_sequence { unsigned int delay_us; }; +#define regmap_set_bits(map, reg, bits) \ + regmap_update_bits_base(map, reg, bits, bits, NULL, false, false) +#define regmap_clear_bits(map, reg, bits) \ + regmap_update_bits_base(map, reg, bits, 0, NULL, false, false) +/* + * 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. + */ +#define regmap_test_bits(map, reg, bits) \ +({ \ + unsigned int __val, __ret, __bits; \ + __bits = (bits); \ + __ret = regmap_read(map, reg, &__val); \ + if (__ret == 0) \ + __ret = (__val & __bits) == __bits ? 1 : 0; \ + __ret; \ +}) + #define regmap_update_bits(map, reg, mask, val) \ regmap_update_bits_base(map, reg, mask, val, NULL, false, false) #define regmap_update_bits_async(map, reg, mask, val)\
--
2.25.0
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