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| author |  Li Chen <lchen@ambarella.com>
| 2022-05-22 20:26:58 -0700 |
|---|---|---|
| committer |  Mark Brown <broonie@kernel.org>
| 2022-06-15 11:17:45 +0100 |
| commit | f67be8b7ee90c292948c3ec6395673963cccaee6 (patch) | |
| tree | a1f67aa5bf78bd775c9884c66c4e9f3db6454c20 /drivers/base | |
| parent | Linux 5.19-rc1 (diff) | |
| download | linux-f67be8b7ee90c292948c3ec6395673963cccaee6.tar.gz linux-f67be8b7ee90c292948c3ec6395673963cccaee6.tar.bz2 linux-f67be8b7ee90c292948c3ec6395673963cccaee6.zip | |
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 <lchen@ambarella.com>
Link: https://lore.kernel.org/r/180eef422c3.deae9cd960729.8518395646822099769@zohomail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/regmap/regmap.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 2221d9863831..cb0be5e7b100 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 * |