Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | /* * 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(dev); if (!input) { dev_err(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) return irq; 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(dev, "failed to register input device: %d\n", error); return error; } device_init_wakeup(dev, 1); return 0; } static struct platform_driver hi65xx_powerkey_driver = { .driver = { .name = "hi65xx-powerkey", }, .probe = hi65xx_powerkey_probe, }; module_platform_driver(hi65xx_powerkey_driver); MODULE_AUTHOR("Zhiliang Xue <xuezhiliang@huawei.com"); MODULE_DESCRIPTION("Hisi PMIC Power key driver"); MODULE_LICENSE("GPL v2"); |