308 lines
6.9 KiB
C
308 lines
6.9 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*
|
||
|
|
* BQ27xxx battery monitor I2C driver
|
||
|
|
*
|
||
|
|
* Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
|
||
|
|
* Andrew F. Davis <afd@ti.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/i2c.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <asm/unaligned.h>
|
||
|
|
|
||
|
|
#include <linux/power/bq27xxx_battery.h>
|
||
|
|
|
||
|
|
static DEFINE_IDR(battery_id);
|
||
|
|
static DEFINE_MUTEX(battery_mutex);
|
||
|
|
|
||
|
|
static irqreturn_t bq27xxx_battery_irq_handler_thread(int irq, void *data)
|
||
|
|
{
|
||
|
|
struct bq27xxx_device_info *di = data;
|
||
|
|
|
||
|
|
bq27xxx_battery_update(di);
|
||
|
|
|
||
|
|
return IRQ_HANDLED;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg,
|
||
|
|
bool single)
|
||
|
|
{
|
||
|
|
struct i2c_client *client = to_i2c_client(di->dev);
|
||
|
|
struct i2c_msg msg[2];
|
||
|
|
u8 data[2];
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (!client->adapter)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
msg[0].addr = client->addr;
|
||
|
|
msg[0].flags = 0;
|
||
|
|
msg[0].buf = ®
|
||
|
|
msg[0].len = sizeof(reg);
|
||
|
|
msg[1].addr = client->addr;
|
||
|
|
msg[1].flags = I2C_M_RD;
|
||
|
|
msg[1].buf = data;
|
||
|
|
if (single)
|
||
|
|
msg[1].len = 1;
|
||
|
|
else
|
||
|
|
msg[1].len = 2;
|
||
|
|
|
||
|
|
ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
if (!single)
|
||
|
|
ret = get_unaligned_le16(data);
|
||
|
|
else
|
||
|
|
ret = data[0];
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int bq27xxx_battery_i2c_write(struct bq27xxx_device_info *di, u8 reg,
|
||
|
|
int value, bool single)
|
||
|
|
{
|
||
|
|
struct i2c_client *client = to_i2c_client(di->dev);
|
||
|
|
struct i2c_msg msg;
|
||
|
|
u8 data[4];
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (!client->adapter)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
data[0] = reg;
|
||
|
|
if (single) {
|
||
|
|
data[1] = (u8) value;
|
||
|
|
msg.len = 2;
|
||
|
|
} else {
|
||
|
|
put_unaligned_le16(value, &data[1]);
|
||
|
|
msg.len = 3;
|
||
|
|
}
|
||
|
|
|
||
|
|
msg.buf = data;
|
||
|
|
msg.addr = client->addr;
|
||
|
|
msg.flags = 0;
|
||
|
|
|
||
|
|
ret = i2c_transfer(client->adapter, &msg, 1);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
if (ret != 1)
|
||
|
|
return -EINVAL;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int bq27xxx_battery_i2c_bulk_read(struct bq27xxx_device_info *di, u8 reg,
|
||
|
|
u8 *data, int len)
|
||
|
|
{
|
||
|
|
struct i2c_client *client = to_i2c_client(di->dev);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (!client->adapter)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
ret = i2c_smbus_read_i2c_block_data(client, reg, len, data);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
if (ret != len)
|
||
|
|
return -EINVAL;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int bq27xxx_battery_i2c_bulk_write(struct bq27xxx_device_info *di,
|
||
|
|
u8 reg, u8 *data, int len)
|
||
|
|
{
|
||
|
|
struct i2c_client *client = to_i2c_client(di->dev);
|
||
|
|
struct i2c_msg msg;
|
||
|
|
u8 buf[33];
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (!client->adapter)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
buf[0] = reg;
|
||
|
|
memcpy(&buf[1], data, len);
|
||
|
|
|
||
|
|
msg.buf = buf;
|
||
|
|
msg.addr = client->addr;
|
||
|
|
msg.flags = 0;
|
||
|
|
msg.len = len + 1;
|
||
|
|
|
||
|
|
ret = i2c_transfer(client->adapter, &msg, 1);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
if (ret != 1)
|
||
|
|
return -EINVAL;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
|
||
|
|
const struct i2c_device_id *id)
|
||
|
|
{
|
||
|
|
struct bq27xxx_device_info *di;
|
||
|
|
int ret;
|
||
|
|
char *name;
|
||
|
|
int num;
|
||
|
|
|
||
|
|
/* Get new ID for the new battery device */
|
||
|
|
mutex_lock(&battery_mutex);
|
||
|
|
num = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
|
||
|
|
mutex_unlock(&battery_mutex);
|
||
|
|
if (num < 0)
|
||
|
|
return num;
|
||
|
|
|
||
|
|
name = devm_kasprintf(&client->dev, GFP_KERNEL, "%s-%d", id->name, num);
|
||
|
|
if (!name)
|
||
|
|
goto err_mem;
|
||
|
|
|
||
|
|
di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL);
|
||
|
|
if (!di)
|
||
|
|
goto err_mem;
|
||
|
|
|
||
|
|
di->id = num;
|
||
|
|
di->dev = &client->dev;
|
||
|
|
di->chip = id->driver_data;
|
||
|
|
di->name = name;
|
||
|
|
|
||
|
|
di->bus.read = bq27xxx_battery_i2c_read;
|
||
|
|
di->bus.write = bq27xxx_battery_i2c_write;
|
||
|
|
di->bus.read_bulk = bq27xxx_battery_i2c_bulk_read;
|
||
|
|
di->bus.write_bulk = bq27xxx_battery_i2c_bulk_write;
|
||
|
|
|
||
|
|
ret = bq27xxx_battery_setup(di);
|
||
|
|
if (ret)
|
||
|
|
goto err_failed;
|
||
|
|
|
||
|
|
/* Schedule a polling after about 1 min */
|
||
|
|
schedule_delayed_work(&di->work, 60 * HZ);
|
||
|
|
|
||
|
|
i2c_set_clientdata(client, di);
|
||
|
|
|
||
|
|
if (client->irq) {
|
||
|
|
ret = request_threaded_irq(client->irq,
|
||
|
|
NULL, bq27xxx_battery_irq_handler_thread,
|
||
|
|
IRQF_ONESHOT,
|
||
|
|
di->name, di);
|
||
|
|
if (ret) {
|
||
|
|
dev_err(&client->dev,
|
||
|
|
"Unable to register IRQ %d error %d\n",
|
||
|
|
client->irq, ret);
|
||
|
|
bq27xxx_battery_teardown(di);
|
||
|
|
goto err_failed;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_mem:
|
||
|
|
ret = -ENOMEM;
|
||
|
|
|
||
|
|
err_failed:
|
||
|
|
mutex_lock(&battery_mutex);
|
||
|
|
idr_remove(&battery_id, num);
|
||
|
|
mutex_unlock(&battery_mutex);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void bq27xxx_battery_i2c_remove(struct i2c_client *client)
|
||
|
|
{
|
||
|
|
struct bq27xxx_device_info *di = i2c_get_clientdata(client);
|
||
|
|
|
||
|
|
free_irq(client->irq, di);
|
||
|
|
bq27xxx_battery_teardown(di);
|
||
|
|
|
||
|
|
mutex_lock(&battery_mutex);
|
||
|
|
idr_remove(&battery_id, di->id);
|
||
|
|
mutex_unlock(&battery_mutex);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct i2c_device_id bq27xxx_i2c_id_table[] = {
|
||
|
|
{ "bq27200", BQ27000 },
|
||
|
|
{ "bq27210", BQ27010 },
|
||
|
|
{ "bq27500", BQ2750X },
|
||
|
|
{ "bq27510", BQ2751X },
|
||
|
|
{ "bq27520", BQ2752X },
|
||
|
|
{ "bq27500-1", BQ27500 },
|
||
|
|
{ "bq27510g1", BQ27510G1 },
|
||
|
|
{ "bq27510g2", BQ27510G2 },
|
||
|
|
{ "bq27510g3", BQ27510G3 },
|
||
|
|
{ "bq27520g1", BQ27520G1 },
|
||
|
|
{ "bq27520g2", BQ27520G2 },
|
||
|
|
{ "bq27520g3", BQ27520G3 },
|
||
|
|
{ "bq27520g4", BQ27520G4 },
|
||
|
|
{ "bq27521", BQ27521 },
|
||
|
|
{ "bq27530", BQ27530 },
|
||
|
|
{ "bq27531", BQ27531 },
|
||
|
|
{ "bq27541", BQ27541 },
|
||
|
|
{ "bq27542", BQ27542 },
|
||
|
|
{ "bq27546", BQ27546 },
|
||
|
|
{ "bq27742", BQ27742 },
|
||
|
|
{ "bq27545", BQ27545 },
|
||
|
|
{ "bq27411", BQ27411 },
|
||
|
|
{ "bq27421", BQ27421 },
|
||
|
|
{ "bq27425", BQ27425 },
|
||
|
|
{ "bq27426", BQ27426 },
|
||
|
|
{ "bq27441", BQ27441 },
|
||
|
|
{ "bq27621", BQ27621 },
|
||
|
|
{ "bq27z561", BQ27Z561 },
|
||
|
|
{ "bq28z610", BQ28Z610 },
|
||
|
|
{ "bq34z100", BQ34Z100 },
|
||
|
|
{ "bq78z100", BQ78Z100 },
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(i2c, bq27xxx_i2c_id_table);
|
||
|
|
|
||
|
|
#ifdef CONFIG_OF
|
||
|
|
static const struct of_device_id bq27xxx_battery_i2c_of_match_table[] = {
|
||
|
|
{ .compatible = "ti,bq27200" },
|
||
|
|
{ .compatible = "ti,bq27210" },
|
||
|
|
{ .compatible = "ti,bq27500" },
|
||
|
|
{ .compatible = "ti,bq27510" },
|
||
|
|
{ .compatible = "ti,bq27520" },
|
||
|
|
{ .compatible = "ti,bq27500-1" },
|
||
|
|
{ .compatible = "ti,bq27510g1" },
|
||
|
|
{ .compatible = "ti,bq27510g2" },
|
||
|
|
{ .compatible = "ti,bq27510g3" },
|
||
|
|
{ .compatible = "ti,bq27520g1" },
|
||
|
|
{ .compatible = "ti,bq27520g2" },
|
||
|
|
{ .compatible = "ti,bq27520g3" },
|
||
|
|
{ .compatible = "ti,bq27520g4" },
|
||
|
|
{ .compatible = "ti,bq27521" },
|
||
|
|
{ .compatible = "ti,bq27530" },
|
||
|
|
{ .compatible = "ti,bq27531" },
|
||
|
|
{ .compatible = "ti,bq27541" },
|
||
|
|
{ .compatible = "ti,bq27542" },
|
||
|
|
{ .compatible = "ti,bq27546" },
|
||
|
|
{ .compatible = "ti,bq27742" },
|
||
|
|
{ .compatible = "ti,bq27545" },
|
||
|
|
{ .compatible = "ti,bq27411" },
|
||
|
|
{ .compatible = "ti,bq27421" },
|
||
|
|
{ .compatible = "ti,bq27425" },
|
||
|
|
{ .compatible = "ti,bq27426" },
|
||
|
|
{ .compatible = "ti,bq27441" },
|
||
|
|
{ .compatible = "ti,bq27621" },
|
||
|
|
{ .compatible = "ti,bq27z561" },
|
||
|
|
{ .compatible = "ti,bq28z610" },
|
||
|
|
{ .compatible = "ti,bq34z100" },
|
||
|
|
{ .compatible = "ti,bq78z100" },
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, bq27xxx_battery_i2c_of_match_table);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static struct i2c_driver bq27xxx_battery_i2c_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "bq27xxx-battery",
|
||
|
|
.of_match_table = of_match_ptr(bq27xxx_battery_i2c_of_match_table),
|
||
|
|
},
|
||
|
|
.probe = bq27xxx_battery_i2c_probe,
|
||
|
|
.remove = bq27xxx_battery_i2c_remove,
|
||
|
|
.id_table = bq27xxx_i2c_id_table,
|
||
|
|
};
|
||
|
|
module_i2c_driver(bq27xxx_battery_i2c_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
|
||
|
|
MODULE_DESCRIPTION("BQ27xxx battery monitor i2c driver");
|
||
|
|
MODULE_LICENSE("GPL");
|