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");