drivers/hwmon/nct6775-i2c.c

1 // SPDX-License-Identifier: GPL-2.0
3  * nct6775-i2c - I2C driver for the hardware monitoring functionality of
4  *	         Nuvoton NCT677x Super-I/O chips
13  * operates in a strictly read-only fashion, with the only exception being the
14  * bank-select register (which seems, thankfully, to be replicated for the i2c
22 #include <linux/hwmon-sysfs.h>
34 	struct i2c_client *client = data->driver_data;  in nct6775_i2c_read()
36 	if (bank != data->bank) {  in nct6775_i2c_read()
40 		data->bank = bank;  in nct6775_i2c_read()
66 	struct i2c_client *client = data->driver_data;  in nct6775_i2c_write()
68 	dev_dbg(&client->dev, "skipping attempted write: %02x -> %03x\n", value, reg);  in nct6775_i2c_write()
71 	 * This is a lie, but writing anything but the bank-select register is  in nct6775_i2c_write()
116 	struct i2c_client *client = data->driver_data;  in nct6775_i2c_probe_init()
126 	 * controlling/monitoring the fans -- these are thus unlikely to be  in nct6775_i2c_probe_init()
129 	data->has_fan = 0x03;  in nct6775_i2c_probe_init()
130 	data->has_fan_min = 0x03;  in nct6775_i2c_probe_init()
131 	data->has_pwm = 0x03;  in nct6775_i2c_probe_init()
135 	 * is first applied to the device, the automatic TSI channel detection  in nct6775_i2c_probe_init()
137 	 * not find anything if a channel hasn't yet produced a temperature  in nct6775_i2c_probe_init()
141 	if (!of_property_read_u32(client->dev.of_node, "nuvoton,tsi-channel-mask",  in nct6775_i2c_probe_init()
143 		data->have_tsi_temp |= tsi_channel_mask & GENMASK(NUM_TSI_TEMP - 1, 0);  in nct6775_i2c_probe_init()
160 	struct device *dev = &client->dev;  in nct6775_i2c_probe()
165 	if (of_id && (unsigned long)of_id->data != i2c_id->driver_data)  in nct6775_i2c_probe()
167 			   of_id->name, i2c_id->name);  in nct6775_i2c_probe()
169 	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);  in nct6775_i2c_probe()
171 		return -ENOMEM;  in nct6775_i2c_probe()
173 	data->kind = i2c_id->driver_data;  in nct6775_i2c_probe()
175 	data->read_only = true;  in nct6775_i2c_probe()
176 	data->driver_data = client;  in nct6775_i2c_probe()
177 	data->driver_init = nct6775_i2c_probe_init;  in nct6775_i2c_probe()
185 		.name = "nct6775-i2c",