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5cd345ec1c
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20230920125829.1478827-23-u.kleine-koenig@pengutronix.de Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
135 lines
2.8 KiB
C
135 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* PC Speaker beeper driver for Linux
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*
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* Copyright (c) 2002 Vojtech Pavlik
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* Copyright (c) 1992 Orest Zborowski
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/i8253.h>
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#include <linux/input.h>
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#include <linux/platform_device.h>
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#include <linux/timex.h>
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#include <linux/io.h>
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("PC Speaker beeper driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:pcspkr");
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static int pcspkr_event(struct input_dev *dev, unsigned int type,
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unsigned int code, int value)
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{
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unsigned int count = 0;
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unsigned long flags;
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if (type != EV_SND)
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return -EINVAL;
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switch (code) {
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case SND_BELL:
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if (value)
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value = 1000;
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break;
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case SND_TONE:
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break;
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default:
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return -EINVAL;
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}
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if (value > 20 && value < 32767)
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count = PIT_TICK_RATE / value;
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raw_spin_lock_irqsave(&i8253_lock, flags);
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if (count) {
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/* set command for counter 2, 2 byte write */
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outb_p(0xB6, 0x43);
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/* select desired HZ */
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outb_p(count & 0xff, 0x42);
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outb((count >> 8) & 0xff, 0x42);
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/* enable counter 2 */
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outb_p(inb_p(0x61) | 3, 0x61);
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} else {
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/* disable counter 2 */
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outb(inb_p(0x61) & 0xFC, 0x61);
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}
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raw_spin_unlock_irqrestore(&i8253_lock, flags);
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return 0;
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}
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static int pcspkr_probe(struct platform_device *dev)
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{
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struct input_dev *pcspkr_dev;
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int err;
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pcspkr_dev = input_allocate_device();
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if (!pcspkr_dev)
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return -ENOMEM;
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pcspkr_dev->name = "PC Speaker";
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pcspkr_dev->phys = "isa0061/input0";
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pcspkr_dev->id.bustype = BUS_ISA;
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pcspkr_dev->id.vendor = 0x001f;
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pcspkr_dev->id.product = 0x0001;
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pcspkr_dev->id.version = 0x0100;
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pcspkr_dev->dev.parent = &dev->dev;
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pcspkr_dev->evbit[0] = BIT_MASK(EV_SND);
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pcspkr_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
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pcspkr_dev->event = pcspkr_event;
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err = input_register_device(pcspkr_dev);
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if (err) {
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input_free_device(pcspkr_dev);
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return err;
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}
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platform_set_drvdata(dev, pcspkr_dev);
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return 0;
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}
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static void pcspkr_remove(struct platform_device *dev)
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{
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struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
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input_unregister_device(pcspkr_dev);
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/* turn off the speaker */
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pcspkr_event(NULL, EV_SND, SND_BELL, 0);
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}
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static int pcspkr_suspend(struct device *dev)
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{
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pcspkr_event(NULL, EV_SND, SND_BELL, 0);
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return 0;
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}
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static void pcspkr_shutdown(struct platform_device *dev)
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{
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/* turn off the speaker */
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pcspkr_event(NULL, EV_SND, SND_BELL, 0);
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}
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static const struct dev_pm_ops pcspkr_pm_ops = {
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.suspend = pcspkr_suspend,
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};
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static struct platform_driver pcspkr_platform_driver = {
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.driver = {
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.name = "pcspkr",
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.pm = &pcspkr_pm_ops,
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},
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.probe = pcspkr_probe,
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.remove_new = pcspkr_remove,
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.shutdown = pcspkr_shutdown,
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};
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module_platform_driver(pcspkr_platform_driver);
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