Unverified Commit fc401cb9 authored by Andrei.Stefanescu@microchip.com's avatar Andrei.Stefanescu@microchip.com Committed by Mark Brown
Browse files

regulator: mcp16502: add support for suspend 



This patch adds support for entering/resuming suspend states.
It does this by setting the LPM pin of the PMIC.

When suspending the PMIC will enter the Low-power mode
when the LPM pin will be set to high. If the suspend target state
is suspend-to-mem, the PMIC will transition to Hibernate mode,
otherwise, if it is standby, it will remain in Low-power mode.

Signed-off-by: default avatarAndrei Stefanescu <andrei.stefanescu@microchip.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 82b4d997

drivers/regulator/mcp16502.c

+34 −0
Original line number Diff line number Diff line
@@ -497,6 +497,37 @@ static int mcp16502_probe(struct i2c_client *client, 
	return 0;

}



#ifdef CONFIG_SUSPEND

static int mcp16502_suspend_noirq(struct device *dev)

{

	struct i2c_client *client = to_i2c_client(dev);

	struct mcp16502 *mcp = i2c_get_clientdata(client);



	mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_LPM);



	return 0;

}



static int mcp16502_resume_noirq(struct device *dev)

{

	struct i2c_client *client = to_i2c_client(dev);

	struct mcp16502 *mcp = i2c_get_clientdata(client);



	mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_ACTIVE);



	return 0;

}

#else /* !CONFIG_SUSPEND */

#define mcp16502_suspend NULL

#define mcp16502_resume NULL

#endif /* !CONFIG_SUSPEND */



#ifdef CONFIG_PM

static const struct dev_pm_ops mcp16502_pm_ops = {

	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mcp16502_suspend_noirq,

				     mcp16502_resume_noirq)

};

#endif

static const struct i2c_device_id mcp16502_i2c_id[] = {

	{ "mcp16502", 0 },

	{ }
@@ -508,6 +539,9 @@ static struct i2c_driver mcp16502_drv = { 
	.driver		= {

		.name	= "mcp16502-regulator",

		.of_match_table	= of_match_ptr(mcp16502_ids),

#ifdef CONFIG_PM

		.pm = &mcp16502_pm_ops,

#endif

	},

	.id_table	= mcp16502_i2c_id,

};

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