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| author | Rob Herring (Arm) <robh@kernel.org> | 2026-08-31 14:43:51 -0500 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2026-09-13 18:17:31 -0700 |
| commit | 55fc280e951ab2b39f3dcb640edc1b1eebc6d173 (patch) | |
| tree | f0b5f37b42fc13b9908a31b657c646b024231cdd /drivers/input/misc/gpio-beeper.c | |
| download | linux-stable-55fc280e951ab2b39f3dcb640edc1b1eebc6d173.tar.gz linux-stable-55fc280e951ab2b39f3dcb640edc1b1eebc6d173.zip | |
Input: tsc2007 - read "ti,poll-period" as u32grafted
The "ti,poll-period" property is documented as a normal uint32 cell.
The driver used a u64 helper, which makes the helper type disagree with
the schema even though the stored value is still small.
Read "ti,poll-period" with the u32 helper matching the documented DT
cell size.
Assisted-by: Codex:gpt-5-5
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260831194352.1185860-1-robh@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/misc/gpio-beeper.c')
| -rw-r--r-- | drivers/input/misc/gpio-beeper.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/drivers/input/misc/gpio-beeper.c b/drivers/input/misc/gpio-beeper.c new file mode 100644 index 000000000..3d65cb4f4 --- /dev/null +++ b/drivers/input/misc/gpio-beeper.c @@ -0,0 +1,114 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Generic GPIO beeper driver + * + * Copyright (C) 2013-2014 Alexander Shiyan <shc_work@mail.ru> + */ + +#include <linux/input.h> +#include <linux/module.h> +#include <linux/gpio/consumer.h> +#include <linux/of.h> +#include <linux/workqueue.h> +#include <linux/platform_device.h> + +#define BEEPER_MODNAME "gpio-beeper" + +struct gpio_beeper { + struct work_struct work; + struct gpio_desc *desc; + bool beeping; +}; + +static void gpio_beeper_toggle(struct gpio_beeper *beep, bool on) +{ + gpiod_set_value_cansleep(beep->desc, on); +} + +static void gpio_beeper_work(struct work_struct *work) +{ + struct gpio_beeper *beep = container_of(work, struct gpio_beeper, work); + + gpio_beeper_toggle(beep, beep->beeping); +} + +static int gpio_beeper_event(struct input_dev *dev, unsigned int type, + unsigned int code, int value) +{ + struct gpio_beeper *beep = input_get_drvdata(dev); + + if (type != EV_SND || code != SND_BELL) + return -ENOTSUPP; + + if (value < 0) + return -EINVAL; + + beep->beeping = value; + /* Schedule work to actually turn the beeper on or off */ + schedule_work(&beep->work); + + return 0; +} + +static void gpio_beeper_close(struct input_dev *input) +{ + struct gpio_beeper *beep = input_get_drvdata(input); + + cancel_work_sync(&beep->work); + gpio_beeper_toggle(beep, false); +} + +static int gpio_beeper_probe(struct platform_device *pdev) +{ + struct gpio_beeper *beep; + struct input_dev *input; + + beep = devm_kzalloc(&pdev->dev, sizeof(*beep), GFP_KERNEL); + if (!beep) + return -ENOMEM; + + beep->desc = devm_gpiod_get(&pdev->dev, NULL, GPIOD_OUT_LOW); + if (IS_ERR(beep->desc)) + return PTR_ERR(beep->desc); + + input = devm_input_allocate_device(&pdev->dev); + if (!input) + return -ENOMEM; + + INIT_WORK(&beep->work, gpio_beeper_work); + + input->name = pdev->name; + input->id.bustype = BUS_HOST; + input->id.vendor = 0x0001; + input->id.product = 0x0001; + input->id.version = 0x0100; + input->close = gpio_beeper_close; + input->event = gpio_beeper_event; + + input_set_capability(input, EV_SND, SND_BELL); + + input_set_drvdata(input, beep); + + return input_register_device(input); +} + +#ifdef CONFIG_OF +static const struct of_device_id gpio_beeper_of_match[] = { + { .compatible = "gpio-beeper", }, + { } +}; +MODULE_DEVICE_TABLE(of, gpio_beeper_of_match); +#endif + +static struct platform_driver gpio_beeper_platform_driver = { + .driver = { + .name = BEEPER_MODNAME, + .of_match_table = of_match_ptr(gpio_beeper_of_match), + }, + .probe = gpio_beeper_probe, +}; +module_platform_driver(gpio_beeper_platform_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>"); +MODULE_DESCRIPTION("Generic GPIO beeper driver"); |
