diff options
| author | Deepak Sikri <deepak.sikri@st.com> | 2012-02-24 17:01:15 +0530 |
|---|---|---|
| committer | Wolfram Sang <w.sang@pengutronix.de> | 2012-05-12 14:28:15 +0200 |
| commit | 3bf3b289c233c28aaef16546168a994070aa24a0 (patch) | |
| tree | 811ed056c38c3b5cf3aaaadee7b9bf50493eab5a /drivers/i2c/busses | |
| parent | 6923229380bc8ac112f4e6e76d05542c006feaad (diff) | |
i2c: designware: add PM support
This patch adds in support for standby/S2R/hybernate for i2c-designware driver.
Signed-off-by: Deepak Sikri <deepak.sikri@st.com>
Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Diffstat (limited to 'drivers/i2c/busses')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-platdrv.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 4ba589ab861..f08d0248cf6 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -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, }, }; |