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Input: pwm-beeper - add devicetree probing support

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A very simple binding, the only property is the phandle to the PWM.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Sascha Hauer 2012-11-03 12:05:52 -07:00 committed by Dmitry Torokhov
parent 8ed2757edd
commit d56a289be2
3 changed files with 21 additions and 2 deletions
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7
Documentation/devicetree/bindings/input/pwm-beeper.txt Normal file
View File

@ -0,0 +1,7 @@
* PWM beeper device tree bindings
Registers a PWM device as beeper.
Required properties:
- compatible: should be "pwm-beeper"
- pwms: phandle to the physical PWM device

2
drivers/input/misc/Kconfig
View File

@ -441,7 +441,7 @@ config INPUT_PCF8574
config INPUT_PWM_BEEPER
tristate "PWM beeper support"
depends on HAVE_PWM
depends on HAVE_PWM || PWM
help
Say Y here to get support for PWM based beeper devices.

12
drivers/input/misc/pwm-beeper.c
View File

@ -75,7 +75,11 @@ static int __devinit pwm_beeper_probe(struct platform_device *pdev)
if (!beeper)
return -ENOMEM;
beeper->pwm = pwm_get(&pdev->dev, NULL);
if (IS_ERR(beeper->pwm)) {
dev_dbg(&pdev->dev, "unable to request PWM, trying legacy API\n");
beeper->pwm = pwm_request(pwm_id, "pwm beeper");
}
if (IS_ERR(beeper->pwm)) {
error = PTR_ERR(beeper->pwm);
@ -171,6 +175,13 @@ static SIMPLE_DEV_PM_OPS(pwm_beeper_pm_ops,
#define PWM_BEEPER_PM_OPS NULL
#endif
#ifdef CONFIG_OF
static const struct of_device_id pwm_beeper_match[] = {
{ .compatible = "pwm-beeper", },
{ },
};
#endif
static struct platform_driver pwm_beeper_driver = {
.probe = pwm_beeper_probe,
.remove = __devexit_p(pwm_beeper_remove),
@ -178,6 +189,7 @@ static struct platform_driver pwm_beeper_driver = {
.name = "pwm-beeper",
.owner = THIS_MODULE,
.pm = PWM_BEEPER_PM_OPS,
.of_match_table = of_match_ptr(pwm_beeper_match),
},
};
module_platform_driver(pwm_beeper_driver);