Commit c567fb37 authored by Khiem Nguyen's avatar Khiem Nguyen Committed by Stephen Boyd
Browse files

clk: cs2000: add Suspend/Resume feature 



CS2000 needs re-setup when redume, otherwise, it can't
handle correct clock rate.

Signed-off-by: default avatarKhiem Nguyen <khiem.nguyen.xt@rvc.renesas.com>
[Kuninori: cleanup original patch]
Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
parent 3e1aec4e

drivers/clk/clk-cs2000-cp.c

+22 −0
Original line number Diff line number Diff line
@@ -59,6 +59,10 @@ struct cs2000_priv { 
	struct i2c_client *client;

	struct clk *clk_in;

	struct clk *ref_clk;



	/* suspend/resume */

	unsigned long saved_rate;

	unsigned long saved_parent_rate;

};



static const struct of_device_id cs2000_of_match[] = {
@@ -286,6 +290,9 @@ static int __cs2000_set_rate(struct cs2000_priv *priv, int ch, 
	if (ret < 0)

		return ret;



	priv->saved_rate	= rate;

	priv->saved_parent_rate	= parent_rate;



	return 0;

}
@@ -489,9 +496,24 @@ static int cs2000_probe(struct i2c_client *client, 
	return ret;

}



static int cs2000_resume(struct device *dev)

{

	struct cs2000_priv *priv = dev_get_drvdata(dev);

	int ch = 0; /* it uses ch0 only at this point */



	return __cs2000_set_rate(priv, ch,

				 priv->saved_rate,

				 priv->saved_parent_rate);

}



static const struct dev_pm_ops cs2000_pm_ops = {

	.resume_early	= cs2000_resume,

};



static struct i2c_driver cs2000_driver = {

	.driver = {

		.name = "cs2000-cp",

		.pm	= &cs2000_pm_ops,

		.of_match_table = cs2000_of_match,

	},

	.probe		= cs2000_probe,