diff options
| author | Graeme Gregory <graeme@openmoko.org> | 2008-04-30 20:26:45 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2008-04-30 19:38:34 +0200 |
| commit | fd403dc84f29aee613d13bde5656ba74cdee1e7b (patch) | |
| tree | 44e318e8e62f7c5f03c3d06a577bf1dd48cdd54c /sound | |
| parent | 443590e6f1823cd4bc1199cc658074bc3e30acbf (diff) | |
| download | lwn-fd403dc84f29aee613d13bde5656ba74cdee1e7b.tar.gz lwn-fd403dc84f29aee613d13bde5656ba74cdee1e7b.zip | |
[ALSA] soc - neo1973_wm8753.c add suspend and shutdown hooks for lm4857 chip
Patch taken from the openmoko bugtracker
http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=781
This patch adds Suspend/Resume and Shutdown support for the lm4857 to
the driver.
Signed-off-by: Graeme Gregory <graeme@openmoko.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/s3c24xx/neo1973_wm8753.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sound/soc/s3c24xx/neo1973_wm8753.c b/sound/soc/s3c24xx/neo1973_wm8753.c index c8caddffc42d..0e9d1c5f2484 100644 --- a/sound/soc/s3c24xx/neo1973_wm8753.c +++ b/sound/soc/s3c24xx/neo1973_wm8753.c @@ -616,6 +616,35 @@ static int lm4857_i2c_attach(struct i2c_adapter *adap) return i2c_probe(adap, &addr_data, lm4857_amp_probe); } +static u8 lm4857_state; + +static int lm4857_suspend(struct i2c_client *dev, pm_message_t state) +{ + dev_dbg(&dev->dev, "lm4857_suspend\n"); + lm4857_state = lm4857_regs[LM4857_CTRL] & 0xf; + if (lm4857_state) { + lm4857_regs[LM4857_CTRL] &= 0xf0; + lm4857_write_regs(); + } + return 0; +} + +static int lm4857_resume(struct i2c_client *dev) +{ + if (lm4857_state) { + lm4857_regs[LM4857_CTRL] |= (lm4857_state & 0x0f); + lm4857_write_regs(); + } + return 0; +} + +static void lm4857_shutdown(struct i2c_client *dev) +{ + dev_dbg(&dev->dev, "lm4857_shutdown\n"); + lm4857_regs[LM4857_CTRL] &= 0xf0; + lm4857_write_regs(); +} + /* corgi i2c codec control layer */ static struct i2c_driver lm4857_i2c_driver = { .driver = { @@ -623,6 +652,9 @@ static struct i2c_driver lm4857_i2c_driver = { .owner = THIS_MODULE, }, .id = I2C_DRIVERID_LM4857, + .suspend = lm4857_suspend, + .resume = lm4857_resume, + .shutdown = lm4857_shutdown, .attach_adapter = lm4857_i2c_attach, .detach_client = lm4857_i2c_detach, .command = NULL, |