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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Texas Instruments' TPS65217 and TPS65218 Power Button Input Driver
4 *
5 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
6 * Author: Felipe Balbi <balbi@ti.com>
7 * Author: Marcin Niestroj <m.niestroj@grinn-global.com>
8 */
9
10#include <linux/init.h>
11#include <linux/input.h>
12#include <linux/interrupt.h>
13#include <linux/kernel.h>
14#include <linux/mfd/tps65217.h>
15#include <linux/mfd/tps65218.h>
16#include <linux/module.h>
17#include <linux/of.h>
18#include <linux/platform_device.h>
19#include <linux/regmap.h>
20#include <linux/slab.h>
21
22struct tps6521x_data {
23 unsigned int reg_status;
24 unsigned int pb_mask;
25 const char *name;
26};
27
28static const struct tps6521x_data tps65217_data = {
29 .reg_status = TPS65217_REG_STATUS,
30 .pb_mask = TPS65217_STATUS_PB,
31 .name = "tps65217_pwrbutton",
32};
33
34static const struct tps6521x_data tps65218_data = {
35 .reg_status = TPS65218_REG_STATUS,
36 .pb_mask = TPS65218_STATUS_PB_STATE,
37 .name = "tps65218_pwrbutton",
38};
39
40struct tps6521x_pwrbutton {
41 struct device *dev;
42 struct regmap *regmap;
43 struct input_dev *idev;
44 const struct tps6521x_data *data;
45 char phys[32];
46};
47
48static const struct of_device_id of_tps6521x_pb_match[] = {
49 { .compatible = "ti,tps65217-pwrbutton", .data = &tps65217_data },
50 { .compatible = "ti,tps65218-pwrbutton", .data = &tps65218_data },
51 { },
52};
53MODULE_DEVICE_TABLE(of, of_tps6521x_pb_match);
54
55static irqreturn_t tps6521x_pb_irq(int irq, void *_pwr)
56{
57 struct tps6521x_pwrbutton *pwr = _pwr;
58 const struct tps6521x_data *tps_data = pwr->data;
59 unsigned int reg;
60 int error;
61
62 error = regmap_read(pwr->regmap, tps_data->reg_status, ®);
63 if (error) {
64 dev_err(pwr->dev, "can't read register: %d\n", error);
65 goto out;
66 }
67
68 if (reg & tps_data->pb_mask) {
69 input_report_key(pwr->idev, KEY_POWER, 1);
70 pm_wakeup_event(pwr->dev, 0);
71 } else {
72 input_report_key(pwr->idev, KEY_POWER, 0);
73 }
74
75 input_sync(pwr->idev);
76
77out:
78 return IRQ_HANDLED;
79}
80
81static int tps6521x_pb_probe(struct platform_device *pdev)
82{
83 struct device *dev = &pdev->dev;
84 struct tps6521x_pwrbutton *pwr;
85 struct input_dev *idev;
86 const struct of_device_id *match;
87 int error;
88 int irq;
89
90 match = of_match_node(of_tps6521x_pb_match, dev->of_node);
91 if (!match)
92 return -ENXIO;
93
94 pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL);
95 if (!pwr)
96 return -ENOMEM;
97
98 pwr->data = match->data;
99
100 idev = devm_input_allocate_device(dev);
101 if (!idev)
102 return -ENOMEM;
103
104 idev->name = pwr->data->name;
105 snprintf(pwr->phys, sizeof(pwr->phys), "%s/input0",
106 pwr->data->name);
107 idev->phys = pwr->phys;
108 idev->dev.parent = dev;
109 idev->id.bustype = BUS_I2C;
110
111 input_set_capability(idev, EV_KEY, KEY_POWER);
112
113 pwr->regmap = dev_get_regmap(dev->parent, NULL);
114 pwr->dev = dev;
115 pwr->idev = idev;
116 device_init_wakeup(dev, true);
117
118 irq = platform_get_irq(pdev, 0);
119 if (irq < 0)
120 return -EINVAL;
121
122 error = devm_request_threaded_irq(dev, irq, NULL, tps6521x_pb_irq,
123 IRQF_TRIGGER_RISING |
124 IRQF_TRIGGER_FALLING |
125 IRQF_ONESHOT,
126 pwr->data->name, pwr);
127 if (error) {
128 dev_err(dev, "failed to request IRQ #%d: %d\n", irq, error);
129 return error;
130 }
131
132 error= input_register_device(idev);
133 if (error) {
134 dev_err(dev, "Can't register power button: %d\n", error);
135 return error;
136 }
137
138 return 0;
139}
140
141static const struct platform_device_id tps6521x_pwrbtn_id_table[] = {
142 { "tps65218-pwrbutton", },
143 { "tps65217-pwrbutton", },
144 { /* sentinel */ }
145};
146MODULE_DEVICE_TABLE(platform, tps6521x_pwrbtn_id_table);
147
148static struct platform_driver tps6521x_pb_driver = {
149 .probe = tps6521x_pb_probe,
150 .driver = {
151 .name = "tps6521x_pwrbutton",
152 .of_match_table = of_tps6521x_pb_match,
153 },
154 .id_table = tps6521x_pwrbtn_id_table,
155};
156module_platform_driver(tps6521x_pb_driver);
157
158MODULE_DESCRIPTION("TPS6521X Power Button");
159MODULE_LICENSE("GPL v2");
160MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1/*
2 * Texas Instruments' TPS65218 Power Button Input Driver
3 *
4 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
5 * Author: Felipe Balbi <balbi@ti.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
12 * kind, whether express or implied; without even the implied warranty
13 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17#include <linux/init.h>
18#include <linux/input.h>
19#include <linux/interrupt.h>
20#include <linux/kernel.h>
21#include <linux/mfd/tps65218.h>
22#include <linux/module.h>
23#include <linux/of.h>
24#include <linux/platform_device.h>
25#include <linux/slab.h>
26
27struct tps65218_pwrbutton {
28 struct device *dev;
29 struct tps65218 *tps;
30 struct input_dev *idev;
31};
32
33static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr)
34{
35 struct tps65218_pwrbutton *pwr = _pwr;
36 unsigned int reg;
37 int error;
38
39 error = tps65218_reg_read(pwr->tps, TPS65218_REG_STATUS, ®);
40 if (error) {
41 dev_err(pwr->dev, "can't read register: %d\n", error);
42 goto out;
43 }
44
45 if (reg & TPS65218_STATUS_PB_STATE) {
46 input_report_key(pwr->idev, KEY_POWER, 1);
47 pm_wakeup_event(pwr->dev, 0);
48 } else {
49 input_report_key(pwr->idev, KEY_POWER, 0);
50 }
51
52 input_sync(pwr->idev);
53
54out:
55 return IRQ_HANDLED;
56}
57
58static int tps65218_pwron_probe(struct platform_device *pdev)
59{
60 struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
61 struct device *dev = &pdev->dev;
62 struct tps65218_pwrbutton *pwr;
63 struct input_dev *idev;
64 int error;
65 int irq;
66
67 pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL);
68 if (!pwr)
69 return -ENOMEM;
70
71 idev = devm_input_allocate_device(dev);
72 if (!idev)
73 return -ENOMEM;
74
75 idev->name = "tps65218_pwrbutton";
76 idev->phys = "tps65218_pwrbutton/input0";
77 idev->dev.parent = dev;
78 idev->id.bustype = BUS_I2C;
79
80 input_set_capability(idev, EV_KEY, KEY_POWER);
81
82 pwr->tps = tps;
83 pwr->dev = dev;
84 pwr->idev = idev;
85 platform_set_drvdata(pdev, pwr);
86 device_init_wakeup(dev, true);
87
88 irq = platform_get_irq(pdev, 0);
89 error = devm_request_threaded_irq(dev, irq, NULL, tps65218_pwr_irq,
90 IRQF_TRIGGER_RISING |
91 IRQF_TRIGGER_FALLING |
92 IRQF_ONESHOT,
93 "tps65218-pwrbutton", pwr);
94 if (error) {
95 dev_err(dev, "failed to request IRQ #%d: %d\n",
96 irq, error);
97 return error;
98 }
99
100 error= input_register_device(idev);
101 if (error) {
102 dev_err(dev, "Can't register power button: %d\n", error);
103 return error;
104 }
105
106 return 0;
107}
108
109static const struct of_device_id of_tps65218_pwr_match[] = {
110 { .compatible = "ti,tps65218-pwrbutton" },
111 { },
112};
113MODULE_DEVICE_TABLE(of, of_tps65218_pwr_match);
114
115static struct platform_driver tps65218_pwron_driver = {
116 .probe = tps65218_pwron_probe,
117 .driver = {
118 .name = "tps65218_pwrbutton",
119 .of_match_table = of_tps65218_pwr_match,
120 },
121};
122module_platform_driver(tps65218_pwron_driver);
123
124MODULE_DESCRIPTION("TPS65218 Power Button");
125MODULE_LICENSE("GPL v2");
126MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");