| Joseph Chen | 5a35b85 | 2017-07-24 15:57:12 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Rockchip RK805 PMIC Power Key driver |
| 3 | * |
| 4 | * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd |
| 5 | * |
| 6 | * Author: Joseph Chen <chenjh@rock-chips.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/errno.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/input.h> |
| 17 | #include <linux/interrupt.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | |
| 22 | static irqreturn_t pwrkey_fall_irq(int irq, void *_pwr) |
| 23 | { |
| 24 | struct input_dev *pwr = _pwr; |
| 25 | |
| 26 | input_report_key(pwr, KEY_POWER, 1); |
| 27 | input_sync(pwr); |
| 28 | |
| 29 | return IRQ_HANDLED; |
| 30 | } |
| 31 | |
| 32 | static irqreturn_t pwrkey_rise_irq(int irq, void *_pwr) |
| 33 | { |
| 34 | struct input_dev *pwr = _pwr; |
| 35 | |
| 36 | input_report_key(pwr, KEY_POWER, 0); |
| 37 | input_sync(pwr); |
| 38 | |
| 39 | return IRQ_HANDLED; |
| 40 | } |
| 41 | |
| 42 | static int rk805_pwrkey_probe(struct platform_device *pdev) |
| 43 | { |
| 44 | struct input_dev *pwr; |
| 45 | int fall_irq, rise_irq; |
| 46 | int err; |
| 47 | |
| 48 | pwr = devm_input_allocate_device(&pdev->dev); |
| 49 | if (!pwr) { |
| 50 | dev_err(&pdev->dev, "Can't allocate power button\n"); |
| 51 | return -ENOMEM; |
| 52 | } |
| 53 | |
| 54 | pwr->name = "rk805 pwrkey"; |
| 55 | pwr->phys = "rk805_pwrkey/input0"; |
| 56 | pwr->id.bustype = BUS_HOST; |
| 57 | input_set_capability(pwr, EV_KEY, KEY_POWER); |
| 58 | |
| 59 | fall_irq = platform_get_irq(pdev, 0); |
| 60 | if (fall_irq < 0) { |
| 61 | dev_err(&pdev->dev, "Can't get fall irq: %d\n", fall_irq); |
| 62 | return fall_irq; |
| 63 | } |
| 64 | |
| 65 | rise_irq = platform_get_irq(pdev, 1); |
| 66 | if (rise_irq < 0) { |
| 67 | dev_err(&pdev->dev, "Can't get rise irq: %d\n", rise_irq); |
| 68 | return rise_irq; |
| 69 | } |
| 70 | |
| 71 | err = devm_request_any_context_irq(&pwr->dev, fall_irq, |
| 72 | pwrkey_fall_irq, |
| 73 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
| 74 | "rk805_pwrkey_fall", pwr); |
| 75 | if (err < 0) { |
| 76 | dev_err(&pdev->dev, "Can't register fall irq: %d\n", err); |
| 77 | return err; |
| 78 | } |
| 79 | |
| 80 | err = devm_request_any_context_irq(&pwr->dev, rise_irq, |
| 81 | pwrkey_rise_irq, |
| 82 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
| 83 | "rk805_pwrkey_rise", pwr); |
| 84 | if (err < 0) { |
| 85 | dev_err(&pdev->dev, "Can't register rise irq: %d\n", err); |
| 86 | return err; |
| 87 | } |
| 88 | |
| 89 | err = input_register_device(pwr); |
| 90 | if (err) { |
| 91 | dev_err(&pdev->dev, "Can't register power button: %d\n", err); |
| 92 | return err; |
| 93 | } |
| 94 | |
| 95 | platform_set_drvdata(pdev, pwr); |
| 96 | device_init_wakeup(&pdev->dev, true); |
| 97 | |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | static struct platform_driver rk805_pwrkey_driver = { |
| 102 | .probe = rk805_pwrkey_probe, |
| 103 | .driver = { |
| 104 | .name = "rk805-pwrkey", |
| 105 | }, |
| 106 | }; |
| 107 | module_platform_driver(rk805_pwrkey_driver); |
| 108 | |
| 109 | MODULE_AUTHOR("Joseph Chen <chenjh@rock-chips.com>"); |
| 110 | MODULE_DESCRIPTION("RK805 PMIC Power Key driver"); |
| 111 | MODULE_LICENSE("GPL"); |