diff options
Diffstat (limited to 'drivers/base/regmap/regmap.c')
| -rw-r--r-- | drivers/base/regmap/regmap.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 59f911e57719..c472f624382d 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -827,6 +827,7 @@ struct regmap *__regmap_init(struct device *dev, } else if (!bus->read || !bus->write) { map->reg_read = _regmap_bus_reg_read; map->reg_write = _regmap_bus_reg_write; + map->reg_update_bits = bus->reg_update_bits; map->defer_caching = false; goto skip_format_initialization; @@ -2936,6 +2937,28 @@ 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; |