From f67be8b7ee90c292948c3ec6395673963cccaee6 Mon Sep 17 00:00:00 2001 From: Li Chen Date: Sun, 22 May 2022 20:26:58 -0700 Subject: [PATCH] regmap: provide regmap_field helpers for simple bit operations We have set/clear/test operations for regmap, but not for regmap_field yet. So let's introduce regmap_field helpers too. In many instances regmap_field_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: Li Chen Link: https://lore.kernel.org/r/180eef422c3.deae9cd960729.8518395646822099769@zohomail.com Signed-off-by: Mark Brown --- drivers/base/regmap/regmap.c | 22 ++++++++++++++++++++++ include/linux/regmap.h | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 59 insertions(+) diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 2221d98..cb0be5e 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -2221,6 +2221,28 @@ int regmap_field_update_bits_base(struct regmap_field *field, EXPORT_SYMBOL_GPL(regmap_field_update_bits_base); /** + * regmap_field_test_bits() - Check if all specified bits are set in a + * register field. + * + * @field: Register field to operate on + * @bits: Bits to test + * + * Returns -1 if the underlying regmap_field_read() fails, 0 if at least one of the + * tested bits is not set and 1 if all tested bits are set. + */ +int regmap_field_test_bits(struct regmap_field *field, unsigned int bits) +{ + unsigned int val, ret; + + ret = regmap_field_read(field, &val); + if (ret) + return ret; + + return (val & bits) == bits; +} +EXPORT_SYMBOL_GPL(regmap_field_test_bits); + +/** * regmap_fields_update_bits_base() - Perform a read/modify/write cycle a * register field with port ID * diff --git a/include/linux/regmap.h b/include/linux/regmap.h index 8952fa3..d5b08f4 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -1336,6 +1336,22 @@ static inline int regmap_field_update_bits(struct regmap_field *field, NULL, false, false); } +static inline int regmap_field_set_bits(struct regmap_field *field, + unsigned int bits) +{ + return regmap_field_update_bits_base(field, bits, bits, NULL, false, + false); +} + +static inline int regmap_field_clear_bits(struct regmap_field *field, + unsigned int bits) +{ + return regmap_field_update_bits_base(field, bits, 0, NULL, false, + false); +} + +int regmap_field_test_bits(struct regmap_field *field, unsigned int bits); + static inline int regmap_field_force_update_bits(struct regmap_field *field, unsigned int mask, unsigned int val) @@ -1769,6 +1785,27 @@ regmap_field_force_update_bits(struct regmap_field *field, return -EINVAL; } +static inline int regmap_field_set_bits(struct regmap_field *field, + unsigned int bits) +{ + WARN_ONCE(1, "regmap API is disabled"); + return -EINVAL; +} + +static inline int regmap_field_clear_bits(struct regmap_field *field, + unsigned int bits) +{ + WARN_ONCE(1, "regmap API is disabled"); + return -EINVAL; +} + +static inline int regmap_field_test_bits(struct regmap_field *field, + unsigned int bits) +{ + WARN_ONCE(1, "regmap API is disabled"); + return -EINVAL; +} + static inline int regmap_fields_write(struct regmap_field *field, unsigned int id, unsigned int val) { -- 2.7.4