This is a note to let you know that I've just added the patch titled
ASoC: pcm512x: Trigger auto-increment of register addresses on i2c
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
asoc-pcm512x-trigger-auto-increment-of-register-addresses-on-i2c.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 681a19560378213a193c424881b2180a783b81ae Mon Sep 17 00:00:00 2001
From: Peter Rosin <peda@xxxxxxxxxx>
Date: Mon, 8 Dec 2014 16:33:11 +0100
Subject: ASoC: pcm512x: Trigger auto-increment of register addresses on i2c
From: Peter Rosin <peda@xxxxxxxxxx>
commit 681a19560378213a193c424881b2180a783b81ae upstream.
When the codec is connected using i2c, it will only auto-increment
register addresses if msb (0x80) of the register address byte is set.
[Fixes cache sync if multiple adjacent registers are updated -- broonie]
Signed-off-by: Peter Rosin <peda@xxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/soc/codecs/pcm512x-i2c.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/sound/soc/codecs/pcm512x-i2c.c
+++ b/sound/soc/codecs/pcm512x-i2c.c
@@ -24,8 +24,13 @@ static int pcm512x_i2c_probe(struct i2c_
const struct i2c_device_id *id)
{
struct regmap *regmap;
+ struct regmap_config config = pcm512x_regmap;
- regmap = devm_regmap_init_i2c(i2c, &pcm512x_regmap);
+ /* msb needs to be set to enable auto-increment of addresses */
+ config.read_flag_mask = 0x80;
+ config.write_flag_mask = 0x80;
+
+ regmap = devm_regmap_init_i2c(i2c, &config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
Patches currently in stable-queue which might be from peda@xxxxxxxxxx are
queue-3.18/asoc-pcm512x-trigger-auto-increment-of-register-addresses-on-i2c.patch
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