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[ALSA] soc - neo1973_wm8753.c add suspend and shutdown hooks for lm4857 chip

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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>
This commit is contained in:
Graeme Gregory 2008-04-30 20:26:45 +02:00 committed by Takashi Iwai
parent 443590e6f1
commit fd403dc84f
1 changed files with 32 additions and 0 deletions
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32
sound/soc/s3c24xx/neo1973_wm8753.c
View file

@ -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,