2 * SCI Reset driver for Keystone based devices
4 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
5 * Andrew F. Davis <afd@ti.com>
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.
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.
17 #include <linux/i2c.h>
18 #include <linux/interrupt.h>
19 #include <linux/module.h>
20 #include <asm/unaligned.h>
22 #include <linux/power/bq27xxx_battery.h>
24 static irqreturn_t bq27xxx_battery_irq_handler_thread(int irq, void *data)
26 struct bq27xxx_device_info *di = data;
28 bq27xxx_battery_update(di);
33 static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg,
36 struct i2c_client *client = to_i2c_client(di->dev);
37 struct i2c_msg msg[2];
38 unsigned char data[2];
44 msg[0].addr = client->addr;
47 msg[0].len = sizeof(reg);
48 msg[1].addr = client->addr;
49 msg[1].flags = I2C_M_RD;
56 ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
61 ret = get_unaligned_le16(data);
68 static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
69 const struct i2c_device_id *id)
71 struct bq27xxx_device_info *di;
74 di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL);
78 di->dev = &client->dev;
79 di->chip = id->driver_data;
81 di->bus.read = bq27xxx_battery_i2c_read;
83 ret = bq27xxx_battery_setup(di);
87 /* Schedule a polling after about 1 min */
88 schedule_delayed_work(&di->work, 60 * HZ);
90 i2c_set_clientdata(client, di);
93 ret = devm_request_threaded_irq(&client->dev, client->irq,
94 NULL, bq27xxx_battery_irq_handler_thread,
99 "Unable to register IRQ %d error %d\n",
108 static int bq27xxx_battery_i2c_remove(struct i2c_client *client)
110 struct bq27xxx_device_info *di = i2c_get_clientdata(client);
112 bq27xxx_battery_teardown(di);
117 static const struct i2c_device_id bq27xxx_i2c_id_table[] = {
118 { "bq27200", BQ27000 },
119 { "bq27210", BQ27010 },
120 { "bq27500", BQ27500 },
121 { "bq27510", BQ27500 },
122 { "bq27520", BQ27500 },
123 { "bq27530", BQ27530 },
124 { "bq27531", BQ27530 },
125 { "bq27541", BQ27541 },
126 { "bq27542", BQ27541 },
127 { "bq27546", BQ27541 },
128 { "bq27742", BQ27541 },
129 { "bq27545", BQ27545 },
130 { "bq27421", BQ27421 },
131 { "bq27425", BQ27421 },
132 { "bq27441", BQ27421 },
133 { "bq27621", BQ27421 },
136 MODULE_DEVICE_TABLE(i2c, bq27xxx_i2c_id_table);
138 static struct i2c_driver bq27xxx_battery_i2c_driver = {
140 .name = "bq27xxx-battery",
142 .probe = bq27xxx_battery_i2c_probe,
143 .remove = bq27xxx_battery_i2c_remove,
144 .id_table = bq27xxx_i2c_id_table,
146 module_i2c_driver(bq27xxx_battery_i2c_driver);
148 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
149 MODULE_DESCRIPTION("BQ27xxx battery monitor i2c driver");
150 MODULE_LICENSE("GPL");