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    Subject[PATCH 3.18 023/150] ASoC: pcm512x: Trigger auto-increment of register addresses on i2c
    Date
    3.18-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    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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