^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * PWM beeper driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/regulator/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/property.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/pwm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct pwm_beeper {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct pwm_device *pwm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct regulator *amplifier;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct work_struct work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) unsigned long period;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) unsigned int bell_frequency;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) bool suspended;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) bool amplifier_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define HZ_TO_NANOSECONDS(x) (1000000000UL/(x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static int pwm_beeper_on(struct pwm_beeper *beeper, unsigned long period)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct pwm_state state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) pwm_get_state(beeper->pwm, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) state.enabled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) state.period = period;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) pwm_set_relative_duty_cycle(&state, 50, 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) error = pwm_apply_state(beeper->pwm, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (!beeper->amplifier_on) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) error = regulator_enable(beeper->amplifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) pwm_disable(beeper->pwm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) beeper->amplifier_on = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static void pwm_beeper_off(struct pwm_beeper *beeper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (beeper->amplifier_on) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) regulator_disable(beeper->amplifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) beeper->amplifier_on = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) pwm_disable(beeper->pwm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static void pwm_beeper_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct pwm_beeper *beeper = container_of(work, struct pwm_beeper, work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) unsigned long period = READ_ONCE(beeper->period);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (period)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) pwm_beeper_on(beeper, period);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) pwm_beeper_off(beeper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static int pwm_beeper_event(struct input_dev *input,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) unsigned int type, unsigned int code, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct pwm_beeper *beeper = input_get_drvdata(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (type != EV_SND || value < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) switch (code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) case SND_BELL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) value = value ? beeper->bell_frequency : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) case SND_TONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (value == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) beeper->period = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) beeper->period = HZ_TO_NANOSECONDS(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (!beeper->suspended)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) schedule_work(&beeper->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static void pwm_beeper_stop(struct pwm_beeper *beeper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) cancel_work_sync(&beeper->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) pwm_beeper_off(beeper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static void pwm_beeper_close(struct input_dev *input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct pwm_beeper *beeper = input_get_drvdata(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) pwm_beeper_stop(beeper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static int pwm_beeper_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) struct pwm_beeper *beeper;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct pwm_state state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) u32 bell_frequency;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) beeper = devm_kzalloc(dev, sizeof(*beeper), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (!beeper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) beeper->pwm = devm_pwm_get(dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (IS_ERR(beeper->pwm)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) error = PTR_ERR(beeper->pwm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (error != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) dev_err(dev, "Failed to request PWM device: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /* Sync up PWM state and ensure it is off. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) pwm_init_state(beeper->pwm, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) state.enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) error = pwm_apply_state(beeper->pwm, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) dev_err(dev, "failed to apply initial PWM state: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) beeper->amplifier = devm_regulator_get(dev, "amp");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (IS_ERR(beeper->amplifier)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) error = PTR_ERR(beeper->amplifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (error != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) dev_err(dev, "Failed to get 'amp' regulator: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) INIT_WORK(&beeper->work, pwm_beeper_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) error = device_property_read_u32(dev, "beeper-hz", &bell_frequency);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) bell_frequency = 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) dev_dbg(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) "failed to parse 'beeper-hz' property, using default: %uHz\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) bell_frequency);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) beeper->bell_frequency = bell_frequency;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) beeper->input = devm_input_allocate_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (!beeper->input) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) dev_err(dev, "Failed to allocate input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) beeper->input->name = "pwm-beeper";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) beeper->input->phys = "pwm/input0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) beeper->input->id.bustype = BUS_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) beeper->input->id.vendor = 0x001f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) beeper->input->id.product = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) beeper->input->id.version = 0x0100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) input_set_capability(beeper->input, EV_SND, SND_TONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) input_set_capability(beeper->input, EV_SND, SND_BELL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) beeper->input->event = pwm_beeper_event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) beeper->input->close = pwm_beeper_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) input_set_drvdata(beeper->input, beeper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) error = input_register_device(beeper->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) dev_err(dev, "Failed to register input device: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) platform_set_drvdata(pdev, beeper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static int __maybe_unused pwm_beeper_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) struct pwm_beeper *beeper = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * Spinlock is taken here is not to protect write to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * beeper->suspended, but to ensure that pwm_beeper_event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * does not re-submit work once flag is set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) spin_lock_irq(&beeper->input->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) beeper->suspended = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) spin_unlock_irq(&beeper->input->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) pwm_beeper_stop(beeper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static int __maybe_unused pwm_beeper_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) struct pwm_beeper *beeper = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) spin_lock_irq(&beeper->input->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) beeper->suspended = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) spin_unlock_irq(&beeper->input->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /* Let worker figure out if we should resume beeping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) schedule_work(&beeper->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static SIMPLE_DEV_PM_OPS(pwm_beeper_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) pwm_beeper_suspend, pwm_beeper_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static const struct of_device_id pwm_beeper_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) { .compatible = "pwm-beeper", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) MODULE_DEVICE_TABLE(of, pwm_beeper_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static struct platform_driver pwm_beeper_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) .probe = pwm_beeper_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) .name = "pwm-beeper",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) .pm = &pwm_beeper_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) .of_match_table = of_match_ptr(pwm_beeper_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) module_platform_driver(pwm_beeper_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) MODULE_DESCRIPTION("PWM beeper driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) MODULE_ALIAS("platform:pwm-beeper");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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