Input: pwm-beeper - support customized freq for SND_BELL (fad358a0) · Commits · 戴 / test

Documentation/devicetree/bindings/input/pwm-beeper.txt

+1 −0

Original line number	Diff line number	Diff line
		@@ -8,6 +8,7 @@ Required properties:

		Optional properties:
		- amp-supply: phandle to a regulator that acts as an amplifier for the beeper
		- beeper-hz: bell frequency in Hz

		Example:

+14 −1

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@
		#include <linux/kernel.h>
		#include <linux/of.h>
		#include <linux/platform_device.h>
		#include <linux/property.h>
		#include <linux/pwm.h>
		#include <linux/slab.h>
		#include <linux/workqueue.h>
		@@ -29,6 +30,7 @@ struct pwm_beeper {
		struct regulator *amplifier;
		struct work_struct work;
		unsigned long period;
		unsigned int bell_frequency;
		bool suspended;
		bool amplifier_on;
		};
		@@ -94,7 +96,7 @@ static int pwm_beeper_event(struct input_dev *input,

		switch (code) {
		case SND_BELL:
		value = value ? 1000 : 0;
		value = value ? beeper->bell_frequency : 0;
		break;
		case SND_TONE:
		break;
		@@ -131,6 +133,7 @@ static int pwm_beeper_probe(struct platform_device *pdev)
		struct device *dev = &pdev->dev;
		struct pwm_beeper *beeper;
		struct pwm_state state;
		u32 bell_frequency;
		int error;

		beeper = devm_kzalloc(dev, sizeof(*beeper), GFP_KERNEL);
		@@ -167,6 +170,16 @@ static int pwm_beeper_probe(struct platform_device *pdev)

		INIT_WORK(&beeper->work, pwm_beeper_work);

		error = device_property_read_u32(dev, "beeper-hz", &bell_frequency);
		if (error) {
		bell_frequency = 1000;
		dev_dbg(dev,
		"failed to parse 'beeper-hz' property, using default: %uHz\n",
		bell_frequency);
		}

		beeper->bell_frequency = bell_frequency;

		beeper->input = devm_input_allocate_device(dev);
		if (!beeper->input) {
		dev_err(dev, "Failed to allocate input device\n");