Separate out I2C functionality into a module. This fixes several small issues and simplifies the driver initialization. Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>tirimbino
Andrew F. Davis
9 years ago
committed by
Sebastian Reichel
parent
1f94b2563a
commit
703df6c097
@ -0,0 +1,150 @@ |
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/*
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* SCI Reset driver for Keystone based devices |
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* |
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* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
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* Andrew F. Davis <afd@ti.com> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any |
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* kind, whether express or implied; without even the implied warranty |
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#include <linux/i2c.h> |
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#include <linux/interrupt.h> |
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#include <linux/module.h> |
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#include <asm/unaligned.h> |
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#include <linux/power/bq27xxx_battery.h> |
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static irqreturn_t bq27xxx_battery_irq_handler_thread(int irq, void *data) |
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{ |
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struct bq27xxx_device_info *di = data; |
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bq27xxx_battery_update(di); |
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return IRQ_HANDLED; |
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} |
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static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg, |
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bool single) |
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{ |
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struct i2c_client *client = to_i2c_client(di->dev); |
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struct i2c_msg msg[2]; |
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unsigned char data[2]; |
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int ret; |
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if (!client->adapter) |
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return -ENODEV; |
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msg[0].addr = client->addr; |
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msg[0].flags = 0; |
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msg[0].buf = ® |
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msg[0].len = sizeof(reg); |
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msg[1].addr = client->addr; |
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msg[1].flags = I2C_M_RD; |
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msg[1].buf = data; |
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if (single) |
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msg[1].len = 1; |
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else |
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msg[1].len = 2; |
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ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); |
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if (ret < 0) |
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return ret; |
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if (!single) |
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ret = get_unaligned_le16(data); |
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else |
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ret = data[0]; |
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return ret; |
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} |
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static int bq27xxx_battery_i2c_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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struct bq27xxx_device_info *di; |
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int ret; |
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di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL); |
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if (!di) |
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return -ENOMEM; |
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di->dev = &client->dev; |
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di->chip = id->driver_data; |
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di->name = id->name; |
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di->bus.read = bq27xxx_battery_i2c_read; |
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ret = bq27xxx_battery_setup(di); |
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if (ret) |
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return ret; |
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/* Schedule a polling after about 1 min */ |
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schedule_delayed_work(&di->work, 60 * HZ); |
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i2c_set_clientdata(client, di); |
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if (client->irq) { |
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ret = devm_request_threaded_irq(&client->dev, client->irq, |
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NULL, bq27xxx_battery_irq_handler_thread, |
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IRQF_ONESHOT, |
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di->name, di); |
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if (ret) { |
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dev_err(&client->dev, |
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"Unable to register IRQ %d error %d\n", |
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client->irq, ret); |
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return ret; |
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} |
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} |
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return 0; |
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} |
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static int bq27xxx_battery_i2c_remove(struct i2c_client *client) |
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{ |
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struct bq27xxx_device_info *di = i2c_get_clientdata(client); |
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bq27xxx_battery_teardown(di); |
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return 0; |
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} |
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static const struct i2c_device_id bq27xxx_i2c_id_table[] = { |
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{ "bq27200", BQ27000 }, |
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{ "bq27210", BQ27010 }, |
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{ "bq27500", BQ27500 }, |
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{ "bq27510", BQ27500 }, |
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{ "bq27520", BQ27500 }, |
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{ "bq27530", BQ27530 }, |
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{ "bq27531", BQ27530 }, |
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{ "bq27541", BQ27541 }, |
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{ "bq27542", BQ27541 }, |
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{ "bq27546", BQ27541 }, |
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{ "bq27742", BQ27541 }, |
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{ "bq27545", BQ27545 }, |
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{ "bq27421", BQ27421 }, |
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{ "bq27425", BQ27421 }, |
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{ "bq27441", BQ27421 }, |
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{ "bq27621", BQ27421 }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(i2c, bq27xxx_i2c_id_table); |
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static struct i2c_driver bq27xxx_battery_i2c_driver = { |
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.driver = { |
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.name = "bq27xxx-battery", |
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}, |
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.probe = bq27xxx_battery_i2c_probe, |
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.remove = bq27xxx_battery_i2c_remove, |
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.id_table = bq27xxx_i2c_id_table, |
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}; |
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module_i2c_driver(bq27xxx_battery_i2c_driver); |
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MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); |
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MODULE_DESCRIPTION("BQ27xxx battery monitor i2c driver"); |
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MODULE_LICENSE("GPL"); |
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