21 #include <linux/hwmon-sysfs.h>
23 /* Here are names of the chip's registers (a.k.a. commands) */
52 	mutex_lock(&data->update_lock);  in ltc4215_update_device()
55 	if (time_after(jiffies, data->last_updated + HZ / 10) || !data->valid) {  in ltc4215_update_device()
57 		dev_dbg(&client->dev, "Starting ltc4215 update\n");  in ltc4215_update_device()
60 		for (i = 0; i < ARRAY_SIZE(data->regs); i++) {  in ltc4215_update_device()
63 				data->regs[i] = 0;  in ltc4215_update_device()
65 				data->regs[i] = val;  in ltc4215_update_device()
68 		data->last_updated = jiffies;  in ltc4215_update_device()
69 		data->valid = 1;  in ltc4215_update_device()
72 	mutex_unlock(&data->update_lock);  in ltc4215_update_device()
78 static int ltc4215_get_voltage(struct device *dev, u8 reg)  in ltc4215_get_voltage()  argument
81 	const u8 regval = data->regs[reg];  in ltc4215_get_voltage()
84 	switch (reg) {  in ltc4215_get_voltage()
112 	/* The strange looking conversions that follow are fixed-point  in ltc4215_get_current()
127 	const unsigned int voltage = data->regs[LTC4215_SENSE] * 151;  in ltc4215_get_current()
140 	const int voltage = ltc4215_get_voltage(dev, attr->index);  in ltc4215_show_voltage()
173 	const u8 reg = data->regs[attr->index];  in ltc4215_show_alarm()  local
174 	const u32 mask = attr->nr;  in ltc4215_show_alarm()
176 	return snprintf(buf, PAGE_SIZE, "%u\n", (reg & mask) ? 1 : 0);  in ltc4215_show_alarm()
196 #define LTC4215_ALARM(name, mask, reg) \  argument
198 	ltc4215_show_alarm, NULL, (mask), reg)
244 	struct i2c_adapter *adapter = client->adapter;  in ltc4215_probe()
249 		return -ENODEV;  in ltc4215_probe()
253 		ret = -ENOMEM;  in ltc4215_probe()
258 	mutex_init(&data->update_lock);  in ltc4215_probe()
264 	ret = sysfs_create_group(&client->dev.kobj, &ltc4215_group);  in ltc4215_probe()
268 	data->hwmon_dev = hwmon_device_register(&client->dev);  in ltc4215_probe()
269 	if (IS_ERR(data->hwmon_dev)) {  in ltc4215_probe()
270 		ret = PTR_ERR(data->hwmon_dev);  in ltc4215_probe()
277 	sysfs_remove_group(&client->dev.kobj, &ltc4215_group);  in ltc4215_probe()
288 	hwmon_device_unregister(data->hwmon_dev);  in ltc4215_remove()
289 	sysfs_remove_group(&client->dev.kobj, &ltc4215_group);  in ltc4215_remove()