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Commit fd403dc8 authored by Graeme Gregory's avatar Graeme Gregory Committed by Takashi Iwai
Browse files

[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: default avatarGraeme Gregory <graeme@openmoko.org>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 443590e6

sound/soc/s3c24xx/neo1973_wm8753.c

+32 −0
Original line number Diff line number Diff line
@@ -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,