Commit 47ec6e5a authored by Sylvain Rochet's avatar Sylvain Rochet Committed by Dmitry Torokhov

Input: rotary_encoder - add wake up support

This patch adds wake up support to GPIO rotary encoders.
Signed-off-by: default avatarSylvain Rochet <sylvain.rochet@finsecur.com>
Reviewed-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 027c71bb
......@@ -15,6 +15,7 @@ Optional properties:
- rotary-encoder,rollover: Automatic rollove when the rotary value becomes
greater than the specified steps or smaller than 0. For absolute axis only.
- rotary-encoder,half-period: Makes the driver work on half-period mode.
- wakeup-source: Boolean, rotary encoder can wake up the system.
See Documentation/input/rotary-encoder.txt for more information.
......
......@@ -109,6 +109,7 @@ static struct rotary_encoder_platform_data my_rotary_encoder_info = {
.inverted_a = 0,
.inverted_b = 0,
.half_period = false,
.wakeup_source = false,
};
static struct platform_device rotary_encoder_device = {
......
......@@ -26,6 +26,7 @@
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_gpio.h>
#include <linux/pm.h>
#define DRV_NAME "rotary-encoder"
......@@ -180,6 +181,8 @@ static struct rotary_encoder_platform_data *rotary_encoder_parse_dt(struct devic
"rotary-encoder,rollover", NULL);
pdata->half_period = !!of_get_property(np,
"rotary-encoder,half-period", NULL);
pdata->wakeup_source = !!of_get_property(np,
"wakeup-source", NULL);
return pdata;
}
......@@ -280,6 +283,8 @@ static int rotary_encoder_probe(struct platform_device *pdev)
goto exit_free_irq_b;
}
device_init_wakeup(&pdev->dev, pdata->wakeup_source);
platform_set_drvdata(pdev, encoder);
return 0;
......@@ -306,6 +311,8 @@ static int rotary_encoder_remove(struct platform_device *pdev)
struct rotary_encoder *encoder = platform_get_drvdata(pdev);
const struct rotary_encoder_platform_data *pdata = encoder->pdata;
device_init_wakeup(&pdev->dev, false);
free_irq(encoder->irq_a, encoder);
free_irq(encoder->irq_b, encoder);
gpio_free(pdata->gpio_a);
......@@ -320,11 +327,41 @@ static int rotary_encoder_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int rotary_encoder_suspend(struct device *dev)
{
struct rotary_encoder *encoder = dev_get_drvdata(dev);
if (device_may_wakeup(dev)) {
enable_irq_wake(encoder->irq_a);
enable_irq_wake(encoder->irq_b);
}
return 0;
}
static int rotary_encoder_resume(struct device *dev)
{
struct rotary_encoder *encoder = dev_get_drvdata(dev);
if (device_may_wakeup(dev)) {
disable_irq_wake(encoder->irq_a);
disable_irq_wake(encoder->irq_b);
}
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(rotary_encoder_pm_ops,
rotary_encoder_suspend, rotary_encoder_resume);
static struct platform_driver rotary_encoder_driver = {
.probe = rotary_encoder_probe,
.remove = rotary_encoder_remove,
.driver = {
.name = DRV_NAME,
.pm = &rotary_encoder_pm_ops,
.of_match_table = of_match_ptr(rotary_encoder_of_match),
}
};
......
......@@ -11,6 +11,7 @@ struct rotary_encoder_platform_data {
bool relative_axis;
bool rollover;
bool half_period;
bool wakeup_source;
};
#endif /* __ROTARY_ENCODER_H__ */
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