Input: pwm-beeper - switch to using "atomic" PWM API

The "atomic" API allows us to configure PWM period and duty cycle and
enable it in one call.

Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
Tested-by: David Lechner <david@lechnology.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 17 insertions, 9 deletions

diff --git a/drivers/input/misc/pwm-beeper.c b/drivers/input/misc/pwm-beeper.c
index ad9b231e8468..e53801dbd560 100644
--- a/drivers/input/misc/pwm-beeper.c
+++ b/drivers/input/misc/pwm-beeper.c
@@ -37,13 +37,16 @@ struct pwm_beeper {
 
 static int pwm_beeper_on(struct pwm_beeper *beeper, unsigned long period)
 {
+        struct pwm_state state;
         int error;
 
-        error = pwm_config(beeper->pwm, period / 2, period);
-        if (error)
-                return error;
+        pwm_get_state(beeper->pwm, &state);
 
-        error = pwm_enable(beeper->pwm);
+        state.enabled = true;
+        state.period = period;
+        pwm_set_relative_duty_cycle(&state, 50, 100);
+
+        error = pwm_apply_state(beeper->pwm, &state);
         if (error)
                 return error;
 
@@ -127,6 +130,7 @@ static int pwm_beeper_probe(struct platform_device *pdev)
 {
         struct device *dev = &pdev->dev;
         struct pwm_beeper *beeper;
+        struct pwm_state state;
         int error;
 
         beeper = devm_kzalloc(dev, sizeof(*beeper), GFP_KERNEL);
@@ -142,11 +146,15 @@ static int pwm_beeper_probe(struct platform_device *pdev)
                 return error;
         }
 
-        /*
-         * FIXME: pwm_apply_args() should be removed when switching to
-         * the atomic PWM API.
-         */
-        pwm_apply_args(beeper->pwm);
+        /* Sync up PWM state and ensure it is off. */
+        pwm_init_state(beeper->pwm, &state);
+        state.enabled = false;
+        error = pwm_apply_state(beeper->pwm, &state);
+        if (error) {
+                dev_err(dev, "failed to apply initial PWM state: %d\n",
+                        error);
+                return error;
+        }
 
         beeper->amplifier = devm_regulator_get(dev, "amp");
         if (IS_ERR(beeper->amplifier)) {