Messages in this thread Patch in this message | | | From | Mark Brown <> | Date | Tue, 09 Aug 2016 13:44:31 +0100 | Subject | Applied "regmap: debugfs: Add support for dumping write only device registers" to the regmap tree |
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The patch
regmap: debugfs: Add support for dumping write only device registers
has been applied to the regmap tree at
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From 359a2f17604e2c1c8938be2bba32a8cef9cf6303 Mon Sep 17 00:00:00 2001 From: Cristian Birsan <cristian.birsan@microchip.com> Date: Mon, 8 Aug 2016 18:44:22 +0300 Subject: [PATCH] regmap: debugfs: Add support for dumping write only device registers
Add support for dumping write only device registers in debugfs. This is useful for audio codecs that have write only registers (like WM8731). The logic that decides if a value can be printed is moved to regmap_printable() function to allow for easier future updates.
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com> Signed-off-by: Mark Brown <broonie@kernel.org> --- drivers/base/regmap/regmap-debugfs.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index 1ee3d40861c7..36ce3511c733 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -77,6 +77,17 @@ static void regmap_debugfs_free_dump_cache(struct regmap *map) } } +static bool regmap_printable(struct regmap *map, unsigned int reg) +{ + if (regmap_precious(map, reg)) + return false; + + if (!regmap_readable(map, reg) && !regmap_cached(map, reg)) + return false; + + return true; +} + /* * Work out where the start offset maps into register numbers, bearing * in mind that we suppress hidden registers. @@ -105,8 +116,7 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map, if (list_empty(&map->debugfs_off_cache)) { for (; i <= map->max_register; i += map->reg_stride) { /* Skip unprinted registers, closing off cache entry */ - if (!regmap_readable(map, i) || - regmap_precious(map, i)) { + if (!regmap_printable(map, i)) { if (c) { c->max = p - 1; c->max_reg = i - map->reg_stride; @@ -204,7 +214,7 @@ static ssize_t regmap_read_debugfs(struct regmap *map, unsigned int from, start_reg = regmap_debugfs_get_dump_start(map, from, *ppos, &p); for (i = start_reg; i <= to; i += map->reg_stride) { - if (!regmap_readable(map, i)) + if (!regmap_readable(map, i) && !regmap_cached(map, i)) continue; if (regmap_precious(map, i)) -- 2.8.1
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