| Message ID | 1460648909-2657-6-git-send-email-stefan.wahren@i2se.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 14/04/16 16:48, Stefan Wahren wrote: > This patch implements suspend/resume support for mxs-lradc. > It's possible to use the touchscreen as wakeup source. > > Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Looks good to me pending replies to the previous patch comments. > --- > drivers/iio/adc/mxs-lradc.c | 61 +++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 61 insertions(+) > > diff --git a/drivers/iio/adc/mxs-lradc.c b/drivers/iio/adc/mxs-lradc.c > index 97c993f..64704c9 100644 > --- a/drivers/iio/adc/mxs-lradc.c > +++ b/drivers/iio/adc/mxs-lradc.c > @@ -29,6 +29,7 @@ > #include <linux/of.h> > #include <linux/of_device.h> > #include <linux/platform_device.h> > +#include <linux/pm.h> > #include <linux/slab.h> > #include <linux/stmp_device.h> > #include <linux/sysfs.h> > @@ -1745,10 +1746,70 @@ static int mxs_lradc_remove(struct platform_device *pdev) > return 0; > } > > +static int __maybe_unused mxs_lradc_suspend(struct device *dev) > +{ > + struct iio_dev *iio = dev_get_drvdata(dev); > + struct mxs_lradc *lradc = iio_priv(iio); > + struct input_dev *input = lradc->ts_input; > + int ret = 0; > + > + if (input) { > + mutex_lock(&input->mutex); > + > + /* Enable touchscreen wakeup irq */ > + if (input->users && device_may_wakeup(dev)) > + ret = enable_irq_wake(lradc->irq[0]); > + else > + mxs_lradc_disable_ts(lradc); > + > + mutex_unlock(&input->mutex); > + } > + > + if (ret) > + return ret; > + > + mxs_lradc_hw_stop(lradc); > + > + clk_disable_unprepare(lradc->clk); > + > + return ret; > +} > + > +static int __maybe_unused mxs_lradc_resume(struct device *dev) > +{ > + struct iio_dev *iio = dev_get_drvdata(dev); > + struct mxs_lradc *lradc = iio_priv(iio); > + struct input_dev *input = lradc->ts_input; > + int ret; > + > + ret = clk_prepare_enable(lradc->clk); > + if (ret) > + return ret; > + > + mxs_lradc_hw_init(lradc); > + > + if (input) { > + mutex_lock(&input->mutex); > + > + /* Disable touchscreen wakeup irq */ > + if (input->users && device_may_wakeup(dev)) > + ret = disable_irq_wake(lradc->irq[0]); > + else > + mxs_lradc_enable_touch_detection(lradc); > + > + mutex_unlock(&input->mutex); > + } > + > + return ret; > +} > + > +static SIMPLE_DEV_PM_OPS(mxs_lradc_pm_ops, mxs_lradc_suspend, mxs_lradc_resume); > + > static struct platform_driver mxs_lradc_driver = { > .driver = { > .name = DRIVER_NAME, > .of_match_table = mxs_lradc_dt_ids, > + .pm = &mxs_lradc_pm_ops, > }, > .probe = mxs_lradc_probe, > .remove = mxs_lradc_remove, >
diff --git a/drivers/iio/adc/mxs-lradc.c b/drivers/iio/adc/mxs-lradc.c index 97c993f..64704c9 100644 --- a/drivers/iio/adc/mxs-lradc.c +++ b/drivers/iio/adc/mxs-lradc.c @@ -29,6 +29,7 @@ #include <linux/of.h> #include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/pm.h> #include <linux/slab.h> #include <linux/stmp_device.h> #include <linux/sysfs.h> @@ -1745,10 +1746,70 @@ static int mxs_lradc_remove(struct platform_device *pdev) return 0; } +static int __maybe_unused mxs_lradc_suspend(struct device *dev) +{ + struct iio_dev *iio = dev_get_drvdata(dev); + struct mxs_lradc *lradc = iio_priv(iio); + struct input_dev *input = lradc->ts_input; + int ret = 0; + + if (input) { + mutex_lock(&input->mutex); + + /* Enable touchscreen wakeup irq */ + if (input->users && device_may_wakeup(dev)) + ret = enable_irq_wake(lradc->irq[0]); + else + mxs_lradc_disable_ts(lradc); + + mutex_unlock(&input->mutex); + } + + if (ret) + return ret; + + mxs_lradc_hw_stop(lradc); + + clk_disable_unprepare(lradc->clk); + + return ret; +} + +static int __maybe_unused mxs_lradc_resume(struct device *dev) +{ + struct iio_dev *iio = dev_get_drvdata(dev); + struct mxs_lradc *lradc = iio_priv(iio); + struct input_dev *input = lradc->ts_input; + int ret; + + ret = clk_prepare_enable(lradc->clk); + if (ret) + return ret; + + mxs_lradc_hw_init(lradc); + + if (input) { + mutex_lock(&input->mutex); + + /* Disable touchscreen wakeup irq */ + if (input->users && device_may_wakeup(dev)) + ret = disable_irq_wake(lradc->irq[0]); + else + mxs_lradc_enable_touch_detection(lradc); + + mutex_unlock(&input->mutex); + } + + return ret; +} + +static SIMPLE_DEV_PM_OPS(mxs_lradc_pm_ops, mxs_lradc_suspend, mxs_lradc_resume); + static struct platform_driver mxs_lradc_driver = { .driver = { .name = DRIVER_NAME, .of_match_table = mxs_lradc_dt_ids, + .pm = &mxs_lradc_pm_ops, }, .probe = mxs_lradc_probe, .remove = mxs_lradc_remove,
This patch implements suspend/resume support for mxs-lradc. It's possible to use the touchscreen as wakeup source. Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> --- drivers/iio/adc/mxs-lradc.c | 61 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+)