power/supply/bq27xxx_battery_hdq.c

1 // SPDX-License-Identifier: GPL-2.0
3  * BQ27xxx battery monitor HDQ/1-wire driver
5  * Copyright (C) 2007-2017 Texas Instruments Incorporated - https://www.ti.com/
26 MODULE_PARM_DESC(F_ID, "1-wire slave FID for BQ27xxx device");
32 	mutex_lock(&sl->master->bus_mutex);  in w1_bq27000_read()
33 	w1_write_8(sl->master, HDQ_CMD_READ | reg);  in w1_bq27000_read()
34 	val = w1_read_8(sl->master);  in w1_bq27000_read()
35 	mutex_unlock(&sl->master->bus_mutex);  in w1_bq27000_read()
41 				    bool single)  in bq27xxx_battery_hdq_read()  argument
43 	struct w1_slave *sl = dev_to_w1_slave(di->dev);  in bq27xxx_battery_hdq_read()
48 	if (!single) {  in bq27xxx_battery_hdq_read()
64 		} while (temp != upper && --timeout);  in bq27xxx_battery_hdq_read()
67 			return -EIO;  in bq27xxx_battery_hdq_read()
79 	di = devm_kzalloc(&sl->dev, sizeof(*di), GFP_KERNEL);  in bq27xxx_battery_hdq_add_slave()
81 		return -ENOMEM;  in bq27xxx_battery_hdq_add_slave()
83 	dev_set_drvdata(&sl->dev, di);  in bq27xxx_battery_hdq_add_slave()
85 	di->dev = &sl->dev;  in bq27xxx_battery_hdq_add_slave()
86 	di->chip = BQ27000;  in bq27xxx_battery_hdq_add_slave()
87 	di->name = "bq27000-battery";  in bq27xxx_battery_hdq_add_slave()
88 	di->bus.read = bq27xxx_battery_hdq_read;  in bq27xxx_battery_hdq_add_slave()
95 	struct bq27xxx_device_info *di = dev_get_drvdata(&sl->dev);  in bq27xxx_battery_hdq_remove_slave()
126 MODULE_DESCRIPTION("BQ27xxx battery monitor HDQ/1-wire driver");
128 MODULE_ALIAS("w1-family-" __stringify(W1_FAMILY_BQ27000));