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regmap: provide regmap_field helpers for simple bit operations

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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>
This commit is contained in:
Li Chen
2022-05-22 20:26:58 -07:00
committed by Mark Brown
parent f2906aa863
commit f67be8b7ee
2 changed files with 59 additions and 0 deletions
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22
drivers/base/regmap/regmap.c
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@@ -2220,6 +2220,28 @@ 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