2 * OnKey device driver for DA9063
3 * Copyright (C) 2015 Dialog Semiconductor Ltd.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #include <linux/module.h>
17 #include <linux/errno.h>
18 #include <linux/input.h>
19 #include <linux/interrupt.h>
20 #include <linux/platform_device.h>
21 #include <linux/workqueue.h>
22 #include <linux/regmap.h>
24 #include <linux/mfd/da9063/core.h>
25 #include <linux/mfd/da9063/pdata.h>
26 #include <linux/mfd/da9063/registers.h>
30 struct delayed_work work;
31 struct input_dev *input;
36 static void da9063_poll_on(struct work_struct *work)
38 struct da9063_onkey *onkey = container_of(work, struct da9063_onkey,
45 /* Poll to see when the pin is released */
46 error = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val);
49 "Failed to read ON status: %d\n", error);
53 if (!(val & DA9063_NONKEY)) {
54 error = regmap_update_bits(onkey->hw->regmap,
56 DA9063_NONKEY_LOCK, 0);
59 "Failed to reset the Key Delay %d\n", error);
63 input_report_key(onkey->input, KEY_POWER, 0);
64 input_sync(onkey->input);
70 * If the fault log KEY_RESET is detected, then clear it
71 * and shut down the system.
73 error = regmap_read(onkey->hw->regmap,
74 DA9063_REG_FAULT_LOG, &fault_log);
76 dev_warn(&onkey->input->dev,
77 "Cannot read FAULT_LOG: %d\n", error);
78 } else if (fault_log & DA9063_KEY_RESET) {
79 error = regmap_write(onkey->hw->regmap,
83 dev_warn(&onkey->input->dev,
84 "Cannot reset KEY_RESET fault log: %d\n",
87 /* at this point we do any S/W housekeeping
88 * and then send shutdown command
90 dev_dbg(&onkey->input->dev,
91 "Sending SHUTDOWN to DA9063 ...\n");
92 error = regmap_write(onkey->hw->regmap,
96 dev_err(&onkey->input->dev,
97 "Cannot SHUTDOWN DA9063: %d\n",
104 schedule_delayed_work(&onkey->work, msecs_to_jiffies(50));
107 static irqreturn_t da9063_onkey_irq_handler(int irq, void *data)
109 struct da9063_onkey *onkey = data;
113 error = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val);
114 if (onkey->key_power && !error && (val & DA9063_NONKEY)) {
115 input_report_key(onkey->input, KEY_POWER, 1);
116 input_sync(onkey->input);
117 schedule_delayed_work(&onkey->work, 0);
118 dev_dbg(onkey->dev, "KEY_POWER pressed.\n");
120 input_report_key(onkey->input, KEY_SLEEP, 1);
121 input_sync(onkey->input);
122 input_report_key(onkey->input, KEY_SLEEP, 0);
123 input_sync(onkey->input);
124 dev_dbg(onkey->dev, "KEY_SLEEP pressed.\n");
130 static void da9063_cancel_poll(void *data)
132 struct da9063_onkey *onkey = data;
134 cancel_delayed_work_sync(&onkey->work);
137 static int da9063_onkey_probe(struct platform_device *pdev)
139 struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
140 struct da9063_pdata *pdata = dev_get_platdata(da9063->dev);
141 struct da9063_onkey *onkey;
145 onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey),
148 dev_err(&pdev->dev, "Failed to allocate memory.\n");
152 onkey->dev = &pdev->dev;
156 onkey->key_power = pdata->key_power;
159 !of_property_read_bool(pdev->dev.of_node,
160 "dlg,disable-key-power");
162 onkey->input = devm_input_allocate_device(&pdev->dev);
164 dev_err(&pdev->dev, "Failed to allocated input device.\n");
168 onkey->input->name = DA9063_DRVNAME_ONKEY;
169 onkey->input->phys = DA9063_DRVNAME_ONKEY "/input0";
170 onkey->input->dev.parent = &pdev->dev;
172 if (onkey->key_power)
173 input_set_capability(onkey->input, EV_KEY, KEY_POWER);
175 input_set_capability(onkey->input, EV_KEY, KEY_SLEEP);
177 INIT_DELAYED_WORK(&onkey->work, da9063_poll_on);
179 error = devm_add_action(&pdev->dev, da9063_cancel_poll, onkey);
182 "Failed to add cancel poll action: %d\n",
187 irq = platform_get_irq_byname(pdev, "ONKEY");
190 dev_err(&pdev->dev, "Failed to get platform IRQ: %d\n", error);
194 error = devm_request_threaded_irq(&pdev->dev, irq,
195 NULL, da9063_onkey_irq_handler,
196 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
200 "Failed to request IRQ %d: %d\n", irq, error);
204 error = input_register_device(onkey->input);
207 "Failed to register input device: %d\n", error);
211 platform_set_drvdata(pdev, onkey);
215 static struct platform_driver da9063_onkey_driver = {
216 .probe = da9063_onkey_probe,
218 .name = DA9063_DRVNAME_ONKEY,
221 module_platform_driver(da9063_onkey_driver);
223 MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
224 MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063");
225 MODULE_LICENSE("GPL");
226 MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);