2 * Hisilicon PMIC powerkey driver
4 * Copyright (C) 2013 Hisilicon Ltd.
5 * Copyright (C) 2015, 2016 Linaro Ltd.
7 * This file is subject to the terms and conditions of the GNU General
8 * Public License. See the file "COPYING" in the main directory of this
9 * archive for more details.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
17 #include <linux/platform_device.h>
18 #include <linux/interrupt.h>
19 #include <linux/reboot.h>
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/of_irq.h>
23 #include <linux/input.h>
24 #include <linux/slab.h>
26 /* the held interrupt will trigger after 4 seconds */
27 #define MAX_HELD_TIME (4 * MSEC_PER_SEC)
29 static irqreturn_t hi65xx_power_press_isr(int irq, void *q)
31 struct input_dev *input = q;
33 pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
34 input_report_key(input, KEY_POWER, 1);
40 static irqreturn_t hi65xx_power_release_isr(int irq, void *q)
42 struct input_dev *input = q;
44 pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
45 input_report_key(input, KEY_POWER, 0);
51 static irqreturn_t hi65xx_restart_toggle_isr(int irq, void *q)
53 struct input_dev *input = q;
54 int value = test_bit(KEY_RESTART, input->key);
56 pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
57 input_report_key(input, KEY_RESTART, !value);
65 irqreturn_t (*handler)(int irq, void *q);
66 } hi65xx_irq_info[] = {
67 { "down", hi65xx_power_press_isr },
68 { "up", hi65xx_power_release_isr },
69 { "hold 4s", hi65xx_restart_toggle_isr },
72 static int hi65xx_powerkey_probe(struct platform_device *pdev)
74 struct device *dev = &pdev->dev;
75 struct input_dev *input;
78 input = devm_input_allocate_device(dev);
80 dev_err(dev, "failed to allocate input device\n");
84 input->phys = "hisi_on/input0";
85 input->name = "HISI 65xx PowerOn Key";
87 input_set_capability(input, EV_KEY, KEY_POWER);
88 input_set_capability(input, EV_KEY, KEY_RESTART);
90 for (i = 0; i < ARRAY_SIZE(hi65xx_irq_info); i++) {
92 irq = platform_get_irq_byname(pdev, hi65xx_irq_info[i].name);
95 dev_err(dev, "couldn't get irq %s: %d\n",
96 hi65xx_irq_info[i].name, error);
100 error = devm_request_any_context_irq(dev, irq,
101 hi65xx_irq_info[i].handler,
103 hi65xx_irq_info[i].name,
106 dev_err(dev, "couldn't request irq %s: %d\n",
107 hi65xx_irq_info[i].name, error);
112 error = input_register_device(input);
114 dev_err(dev, "failed to register input device: %d\n", error);
118 device_init_wakeup(dev, 1);
123 static struct platform_driver hi65xx_powerkey_driver = {
125 .name = "hi65xx-powerkey",
127 .probe = hi65xx_powerkey_probe,
129 module_platform_driver(hi65xx_powerkey_driver);
131 MODULE_AUTHOR("Zhiliang Xue <xuezhiliang@huawei.com");
132 MODULE_DESCRIPTION("Hisi PMIC Power key driver");
133 MODULE_LICENSE("GPL v2");