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