1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2011 Sony Ericsson Mobile Communications Inc.
5 * Author: Courtney Cavin <courtney.cavin@sonyericsson.com>
6 * Prepared for up-stream by: Oskar Andero <oskar.andero@sonyericsson.com>
10 #include <linux/irq.h>
11 #include <linux/slab.h>
12 #include <linux/input.h>
13 #include <linux/module.h>
14 #include <linux/interrupt.h>
15 #include <linux/gpio.h>
16 #include <linux/delay.h>
17 #include <linux/input/gp2ap002a00f.h>
20 struct input_dev *input;
21 const struct gp2a_platform_data *pdata;
22 struct i2c_client *i2c_client;
29 GP2A_ADDR_CYCLE = 0x3,
30 GP2A_ADDR_OPMOD = 0x4,
35 /* Software Shutdown control: 0 = shutdown, 1 = normal operation */
39 static int gp2a_report(struct gp2a_data *dt)
41 int vo = gpio_get_value(dt->pdata->vout_gpio);
43 input_report_switch(dt->input, SW_FRONT_PROXIMITY, !vo);
44 input_sync(dt->input);
49 static irqreturn_t gp2a_irq(int irq, void *handle)
51 struct gp2a_data *dt = handle;
58 static int gp2a_enable(struct gp2a_data *dt)
60 return i2c_smbus_write_byte_data(dt->i2c_client, GP2A_ADDR_OPMOD,
64 static int gp2a_disable(struct gp2a_data *dt)
66 return i2c_smbus_write_byte_data(dt->i2c_client, GP2A_ADDR_OPMOD,
70 static int gp2a_device_open(struct input_dev *dev)
72 struct gp2a_data *dt = input_get_drvdata(dev);
75 error = gp2a_enable(dt);
77 dev_err(&dt->i2c_client->dev,
78 "unable to activate, err %d\n", error);
87 static void gp2a_device_close(struct input_dev *dev)
89 struct gp2a_data *dt = input_get_drvdata(dev);
92 error = gp2a_disable(dt);
94 dev_err(&dt->i2c_client->dev,
95 "unable to deactivate, err %d\n", error);
98 static int gp2a_initialize(struct gp2a_data *dt)
102 error = i2c_smbus_write_byte_data(dt->i2c_client, GP2A_ADDR_GAIN,
107 error = i2c_smbus_write_byte_data(dt->i2c_client, GP2A_ADDR_HYS,
112 error = i2c_smbus_write_byte_data(dt->i2c_client, GP2A_ADDR_CYCLE,
117 error = gp2a_disable(dt);
122 static int gp2a_probe(struct i2c_client *client,
123 const struct i2c_device_id *id)
125 const struct gp2a_platform_data *pdata = dev_get_platdata(&client->dev);
126 struct gp2a_data *dt;
132 if (pdata->hw_setup) {
133 error = pdata->hw_setup(client);
138 error = gpio_request_one(pdata->vout_gpio, GPIOF_IN, GP2A_I2C_NAME);
140 goto err_hw_shutdown;
142 dt = kzalloc(sizeof(struct gp2a_data), GFP_KERNEL);
149 dt->i2c_client = client;
151 error = gp2a_initialize(dt);
155 dt->input = input_allocate_device();
161 input_set_drvdata(dt->input, dt);
163 dt->input->open = gp2a_device_open;
164 dt->input->close = gp2a_device_close;
165 dt->input->name = GP2A_I2C_NAME;
166 dt->input->id.bustype = BUS_I2C;
167 dt->input->dev.parent = &client->dev;
169 input_set_capability(dt->input, EV_SW, SW_FRONT_PROXIMITY);
171 error = request_threaded_irq(client->irq, NULL, gp2a_irq,
172 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
176 dev_err(&client->dev, "irq request failed\n");
177 goto err_free_input_dev;
180 error = input_register_device(dt->input);
182 dev_err(&client->dev, "device registration failed\n");
186 device_init_wakeup(&client->dev, pdata->wakeup);
187 i2c_set_clientdata(client, dt);
192 free_irq(client->irq, dt);
194 input_free_device(dt->input);
198 gpio_free(pdata->vout_gpio);
200 if (pdata->hw_shutdown)
201 pdata->hw_shutdown(client);
205 static int gp2a_remove(struct i2c_client *client)
207 struct gp2a_data *dt = i2c_get_clientdata(client);
208 const struct gp2a_platform_data *pdata = dt->pdata;
210 free_irq(client->irq, dt);
212 input_unregister_device(dt->input);
215 gpio_free(pdata->vout_gpio);
217 if (pdata->hw_shutdown)
218 pdata->hw_shutdown(client);
223 static int __maybe_unused gp2a_suspend(struct device *dev)
225 struct i2c_client *client = to_i2c_client(dev);
226 struct gp2a_data *dt = i2c_get_clientdata(client);
229 if (device_may_wakeup(&client->dev)) {
230 enable_irq_wake(client->irq);
232 mutex_lock(&dt->input->mutex);
233 if (dt->input->users)
234 retval = gp2a_disable(dt);
235 mutex_unlock(&dt->input->mutex);
241 static int __maybe_unused gp2a_resume(struct device *dev)
243 struct i2c_client *client = to_i2c_client(dev);
244 struct gp2a_data *dt = i2c_get_clientdata(client);
247 if (device_may_wakeup(&client->dev)) {
248 disable_irq_wake(client->irq);
250 mutex_lock(&dt->input->mutex);
251 if (dt->input->users)
252 retval = gp2a_enable(dt);
253 mutex_unlock(&dt->input->mutex);
259 static SIMPLE_DEV_PM_OPS(gp2a_pm, gp2a_suspend, gp2a_resume);
261 static const struct i2c_device_id gp2a_i2c_id[] = {
262 { GP2A_I2C_NAME, 0 },
265 MODULE_DEVICE_TABLE(i2c, gp2a_i2c_id);
267 static struct i2c_driver gp2a_i2c_driver = {
269 .name = GP2A_I2C_NAME,
273 .remove = gp2a_remove,
274 .id_table = gp2a_i2c_id,
277 module_i2c_driver(gp2a_i2c_driver);
279 MODULE_AUTHOR("Courtney Cavin <courtney.cavin@sonyericsson.com>");
280 MODULE_DESCRIPTION("Sharp GP2AP002A00F I2C Proximity/Opto sensor driver");
281 MODULE_LICENSE("GPL v2");