Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 023/150] ASoC: pcm512x: Trigger auto-increment of register addresses on i2c | Date | Tue, 13 Jan 2015 23:21:34 -0800 |
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3.18-stable review patch. If anyone has any objections, please let me know.
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From: Peter Rosin <peda@axentia.se>
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@axentia.se> Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- 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);
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