commit: http://blackfin.uclinux.org/git/?p=linux-kernel;a=commitdiff;h=11f8946111c40cd232b556ed84978db42f87e11b branch: http://blackfin.uclinux.org/git/?p=linux-kernel;a=shortlog;h=refs/heads/2011R1
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 <[email protected]> --- 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 7d4dc11..e57f10f 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);
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