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| author | Mark Brown | 2011-07-24 12:46:20 +0200 |
|---|---|---|
| committer | Mark Brown | 2011-08-08 08:56:41 +0200 |
| commit | 73304781274200c341996f65220d36b3cda8e217 (patch) | |
| tree | 3f5bb6f1b17b68392c360b9de15da756de274a0b /drivers/base | |
| parent | regmap: Add basic tracepoints (diff) | |
| download | kernel-qcow2-linux-73304781274200c341996f65220d36b3cda8e217.tar.gz kernel-qcow2-linux-73304781274200c341996f65220d36b3cda8e217.tar.xz kernel-qcow2-linux-73304781274200c341996f65220d36b3cda8e217.zip | |
regmap: Implement writable register checks
This is mainly intended to be used by devices which can dynamically
block register writes at runtime, for other devices there is usually
limited value.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/regmap/regmap.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 7d4dc11ad86c..e57f10f485a1 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -211,6 +211,13 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg, void *buf; int ret = -ENOTSUPP; size_t len; + int i; + + /* Check for unwritable registers before we start */ + if (map->writeable_reg) + for (i = 0; i < val_len / map->format.val_bytes; i++) + if (!map->writeable_reg(map->dev, reg + i)) + return -EINVAL; map->format.format_reg(map->work_buf, reg); |