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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 | // SPDX-License-Identifier: GPL-2.0-only /* * Texas Instruments' TPS65217 and TPS65218 Power Button Input Driver * * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/ * Author: Felipe Balbi <balbi@ti.com> * Author: Marcin Niestroj <m.niestroj@grinn-global.com> */ #include <linux/init.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/mfd/tps65217.h> #include <linux/mfd/tps65218.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/slab.h> struct tps6521x_data { unsigned int reg_status; unsigned int pb_mask; const char *name; }; static const struct tps6521x_data tps65217_data = { .reg_status = TPS65217_REG_STATUS, .pb_mask = TPS65217_STATUS_PB, .name = "tps65217_pwrbutton", }; static const struct tps6521x_data tps65218_data = { .reg_status = TPS65218_REG_STATUS, .pb_mask = TPS65218_STATUS_PB_STATE, .name = "tps65218_pwrbutton", }; struct tps6521x_pwrbutton { struct device *dev; struct regmap *regmap; struct input_dev *idev; const struct tps6521x_data *data; char phys[32]; }; static const struct of_device_id of_tps6521x_pb_match[] = { { .compatible = "ti,tps65217-pwrbutton", .data = &tps65217_data }, { .compatible = "ti,tps65218-pwrbutton", .data = &tps65218_data }, { }, }; MODULE_DEVICE_TABLE(of, of_tps6521x_pb_match); static irqreturn_t tps6521x_pb_irq(int irq, void *_pwr) { struct tps6521x_pwrbutton *pwr = _pwr; const struct tps6521x_data *tps_data = pwr->data; unsigned int reg; int error; error = regmap_read(pwr->regmap, tps_data->reg_status, ®); if (error) { dev_err(pwr->dev, "can't read register: %d\n", error); goto out; } if (reg & tps_data->pb_mask) { input_report_key(pwr->idev, KEY_POWER, 1); pm_wakeup_event(pwr->dev, 0); } else { input_report_key(pwr->idev, KEY_POWER, 0); } input_sync(pwr->idev); out: return IRQ_HANDLED; } static int tps6521x_pb_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct tps6521x_pwrbutton *pwr; struct input_dev *idev; const struct of_device_id *match; int error; int irq; match = of_match_node(of_tps6521x_pb_match, dev->of_node); if (!match) return -ENXIO; pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL); if (!pwr) return -ENOMEM; pwr->data = match->data; idev = devm_input_allocate_device(dev); if (!idev) return -ENOMEM; idev->name = pwr->data->name; snprintf(pwr->phys, sizeof(pwr->phys), "%s/input0", pwr->data->name); idev->phys = pwr->phys; idev->dev.parent = dev; idev->id.bustype = BUS_I2C; input_set_capability(idev, EV_KEY, KEY_POWER); pwr->regmap = dev_get_regmap(dev->parent, NULL); pwr->dev = dev; pwr->idev = idev; device_init_wakeup(dev, true); irq = platform_get_irq(pdev, 0); if (irq < 0) return -EINVAL; error = devm_request_threaded_irq(dev, irq, NULL, tps6521x_pb_irq, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, pwr->data->name, pwr); if (error) { dev_err(dev, "failed to request IRQ #%d: %d\n", irq, error); return error; } error= input_register_device(idev); if (error) { dev_err(dev, "Can't register power button: %d\n", error); return error; } return 0; } static const struct platform_device_id tps6521x_pwrbtn_id_table[] = { { "tps65218-pwrbutton", }, { "tps65217-pwrbutton", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, tps6521x_pwrbtn_id_table); static struct platform_driver tps6521x_pb_driver = { .probe = tps6521x_pb_probe, .driver = { .name = "tps6521x_pwrbutton", .of_match_table = of_tps6521x_pb_match, }, .id_table = tps6521x_pwrbtn_id_table, }; module_platform_driver(tps6521x_pb_driver); MODULE_DESCRIPTION("TPS6521X Power Button"); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); |