Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3bf3b289 authored by Deepak Sikri's avatar Deepak Sikri Committed by Wolfram Sang
Browse files

i2c: designware: add PM support 



This patch adds in support for standby/S2R/hybernate for i2c-designware driver.

Signed-off-by: default avatarDeepak Sikri <deepak.sikri@st.com>
Signed-off-by: default avatarRajeev Kumar <rajeev-dlh.kumar@st.com>
Signed-off-by: default avatarWolfram Sang <w.sang@pengutronix.de>
parent 69232293

drivers/i2c/busses/i2c-designware-platdrv.c

+27 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ 
#include <linux/interrupt.h>

#include <linux/of_i2c.h>

#include <linux/platform_device.h>

#include <linux/pm.h>

#include <linux/io.h>

#include <linux/slab.h>

#include "i2c-designware-core.h"
@@ -198,6 +199,31 @@ static const struct of_device_id dw_i2c_of_match[] = { 
MODULE_DEVICE_TABLE(of, dw_i2c_of_match);

#endif



#ifdef CONFIG_PM

static int dw_i2c_suspend(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev);



	clk_disable(i_dev->clk);



	return 0;

}



static int dw_i2c_resume(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev);



	clk_enable(i_dev->clk);

	i2c_dw_init(i_dev);



	return 0;

}

#endif



static SIMPLE_DEV_PM_OPS(dw_i2c_dev_pm_ops, dw_i2c_suspend, dw_i2c_resume);



/* work with hotplug and coldplug */

MODULE_ALIAS("platform:i2c_designware");
@@ -207,6 +233,7 @@ static struct platform_driver dw_i2c_driver = { 
		.name	= "i2c_designware",

		.owner	= THIS_MODULE,

		.of_match_table = of_match_ptr(dw_i2c_of_match),

		.pm	= &dw_i2c_dev_pm_ops,

	},

};