lkml.org 
[lkml]   [2011]   [Oct]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Subject[PATCH 10/10] ASoC: wm8988: Convert to snd_soc_cache_sync
    From
    Date
    Convert to snd_soc_cache_sync for sync reg_cache with the hardware.

    Signed-off-by: Axel Lin <axel.lin@gmail.com>
    ---
    sound/soc/codecs/wm8988.c | 32 ++++++++++++++++++--------------
    1 files changed, 18 insertions(+), 14 deletions(-)

    diff --git a/sound/soc/codecs/wm8988.c b/sound/soc/codecs/wm8988.c
    index 1c6f8bf..ed453e5 100644
    --- a/sound/soc/codecs/wm8988.c
    +++ b/sound/soc/codecs/wm8988.c
    @@ -55,6 +55,16 @@ struct wm8988_priv {
    struct snd_pcm_hw_constraint_list *sysclk_constraints;
    };

    +static int wm8988_volatile_register(struct snd_soc_codec *codec,
    + unsigned int reg)
    +{
    + switch (reg) {
    + case WM8988_RESET:
    + return 1;
    + default:
    + return 0;
    + }
    +}

    #define wm8988_reset(c) snd_soc_write(c, WM8988_RESET, 0)

    @@ -663,6 +673,7 @@ static int wm8988_mute(struct snd_soc_dai *dai, int mute)
    static int wm8988_set_bias_level(struct snd_soc_codec *codec,
    enum snd_soc_bias_level level)
    {
    + int ret;
    u16 pwr_reg = snd_soc_read(codec, WM8988_PWR1) & ~0x1c1;

    switch (level) {
    @@ -676,6 +687,12 @@ static int wm8988_set_bias_level(struct snd_soc_codec *codec,

    case SND_SOC_BIAS_STANDBY:
    if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
    + ret = snd_soc_cache_sync(codec);
    + if (ret < 0) {
    + dev_err(codec->dev, "Failed to sync cache: %d\n", ret);
    + return ret;
    + }
    +
    /* VREF, VMID=2x5k */
    snd_soc_write(codec, WM8988_PWR1, pwr_reg | 0x1c1);

    @@ -736,21 +753,7 @@ static int wm8988_suspend(struct snd_soc_codec *codec, pm_message_t state)

    static int wm8988_resume(struct snd_soc_codec *codec)
    {
    - int i;
    - u8 data[2];
    - u16 *cache = codec->reg_cache;
    -
    - /* Sync reg_cache with the hardware */
    - for (i = 0; i < WM8988_NUM_REG; i++) {
    - if (i == WM8988_RESET)
    - continue;
    - data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
    - data[1] = cache[i] & 0x00ff;
    - codec->hw_write(codec->control_data, data, 2);
    - }
    -
    wm8988_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
    -
    return 0;
    }

    @@ -805,6 +808,7 @@ static struct snd_soc_codec_driver soc_codec_dev_wm8988 = {
    .reg_cache_size = ARRAY_SIZE(wm8988_reg),
    .reg_word_size = sizeof(u16),
    .reg_cache_default = wm8988_reg,
    + .volatile_register = wm8988_volatile_register,
    };

    #if defined(CONFIG_SPI_MASTER)
    --
    1.7.4.1




    \
     
     \ /
      Last update: 2011-10-06 08:23    [W:0.024 / U:118.204 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site