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56580c2cb7
Calling device_init_wakeup in the remove function is unnecessary since the device is going away, and thus won't be able to cause any wakeups under any circumstances. Besides, the driver cleanup code already handles the necessary cleanup. Similarly, disabling wakeup in the probe error path is unnecessary, as is disabling wakeup in the probe function in the first place. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/*
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* Hisilicon PMIC powerkey driver
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*
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* Copyright (C) 2013 Hisilicon Ltd.
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* Copyright (C) 2015, 2016 Linaro Ltd.
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/reboot.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_irq.h>
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#include <linux/input.h>
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#include <linux/slab.h>
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/* the held interrupt will trigger after 4 seconds */
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#define MAX_HELD_TIME (4 * MSEC_PER_SEC)
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static irqreturn_t hi65xx_power_press_isr(int irq, void *q)
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{
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struct input_dev *input = q;
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pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
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input_report_key(input, KEY_POWER, 1);
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input_sync(input);
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return IRQ_HANDLED;
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}
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static irqreturn_t hi65xx_power_release_isr(int irq, void *q)
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{
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struct input_dev *input = q;
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pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
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input_report_key(input, KEY_POWER, 0);
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input_sync(input);
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return IRQ_HANDLED;
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}
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static irqreturn_t hi65xx_restart_toggle_isr(int irq, void *q)
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{
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struct input_dev *input = q;
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int value = test_bit(KEY_RESTART, input->key);
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pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
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input_report_key(input, KEY_RESTART, !value);
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input_sync(input);
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return IRQ_HANDLED;
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}
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static const struct {
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const char *name;
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irqreturn_t (*handler)(int irq, void *q);
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} hi65xx_irq_info[] = {
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{ "down", hi65xx_power_press_isr },
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{ "up", hi65xx_power_release_isr },
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{ "hold 4s", hi65xx_restart_toggle_isr },
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};
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static int hi65xx_powerkey_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct input_dev *input;
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int irq, i, error;
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input = devm_input_allocate_device(dev);
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if (!input) {
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dev_err(dev, "failed to allocate input device\n");
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return -ENOMEM;
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}
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input->phys = "hisi_on/input0";
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input->name = "HISI 65xx PowerOn Key";
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input_set_capability(input, EV_KEY, KEY_POWER);
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input_set_capability(input, EV_KEY, KEY_RESTART);
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for (i = 0; i < ARRAY_SIZE(hi65xx_irq_info); i++) {
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irq = platform_get_irq_byname(pdev, hi65xx_irq_info[i].name);
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if (irq < 0) {
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error = irq;
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dev_err(dev, "couldn't get irq %s: %d\n",
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hi65xx_irq_info[i].name, error);
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return error;
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}
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error = devm_request_any_context_irq(dev, irq,
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hi65xx_irq_info[i].handler,
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IRQF_ONESHOT,
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hi65xx_irq_info[i].name,
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input);
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if (error < 0) {
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dev_err(dev, "couldn't request irq %s: %d\n",
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hi65xx_irq_info[i].name, error);
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return error;
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}
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}
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error = input_register_device(input);
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if (error) {
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dev_err(dev, "failed to register input device: %d\n", error);
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return error;
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}
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device_init_wakeup(dev, 1);
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return 0;
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}
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static int hi65xx_powerkey_remove(struct platform_device *pdev)
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{
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return 0;
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}
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static struct platform_driver hi65xx_powerkey_driver = {
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.driver = {
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.name = "hi65xx-powerkey",
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},
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.probe = hi65xx_powerkey_probe,
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.remove = hi65xx_powerkey_remove,
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};
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module_platform_driver(hi65xx_powerkey_driver);
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MODULE_AUTHOR("Zhiliang Xue <xuezhiliang@huawei.com");
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MODULE_DESCRIPTION("Hisi PMIC Power key driver");
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MODULE_LICENSE("GPL v2");
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