Input: pwm-beeper - add devicetree probing support

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>

2 files changed, 14 insertions, 2 deletions

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index c8353570344..0f959d744e7 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -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.
 
diff --git a/drivers/input/misc/pwm-beeper.c b/drivers/input/misc/pwm-beeper.c
index fc84c8a5114..502544c7e0a 100644
--- a/drivers/input/misc/pwm-beeper.c
+++ b/drivers/input/misc/pwm-beeper.c
@@ -75,7 +75,11 @@ static int __devinit pwm_beeper_probe(struct platform_device *pdev)
         if (!beeper)
                 return -ENOMEM;
 
-        beeper->pwm = pwm_request(pwm_id, "pwm beeper");
+        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);