1 // SPDX-License-Identifier: GPL-2.0-only
5  * Sophgo power control mcu for SG2042
11 #include <linux/hwmon.h>
17 /* fixed MCU registers */
41 		struct sg2042_mcu_data *mcu = seqf->private;		\
43 		ret = i2c_smbus_read_byte_data(mcu->client, (_reg));	\
63 	struct sg2042_mcu_data *mcu = dev_get_drvdata(dev);  in reset_count_show()  local
66 	ret = i2c_smbus_read_byte_data(mcu->client, REG_RST_COUNT);  in reset_count_show()
77 	struct sg2042_mcu_data *mcu = dev_get_drvdata(dev);  in uptime_show()  local
81 	ret = i2c_smbus_read_i2c_block_data(mcu->client, REG_UPTIME,  in uptime_show()
94 	struct sg2042_mcu_data *mcu = dev_get_drvdata(dev);  in reset_reason_show()  local
97 	ret = i2c_smbus_read_byte_data(mcu->client, REG_RESET_REASON);  in reset_reason_show()
108 	struct sg2042_mcu_data *mcu = dev_get_drvdata(dev);  in repower_policy_show()  local
112 	ret = i2c_smbus_read_byte_data(mcu->client, REG_REPOWER_POLICY);  in repower_policy_show()
130 	struct sg2042_mcu_data *mcu = dev_get_drvdata(dev);  in repower_policy_store()  local
139 		return -EINVAL;  in repower_policy_store()
141 	ret = i2c_smbus_write_byte_data(mcu->client,  in repower_policy_store()
188 	struct sg2042_mcu_data *mcu = dev_get_drvdata(dev);  in sg2042_mcu_read()  local
203 		return -EOPNOTSUPP;  in sg2042_mcu_read()
206 	tmp = i2c_smbus_read_byte_data(mcu->client, reg);  in sg2042_mcu_read()
218 	struct sg2042_mcu_data *mcu = dev_get_drvdata(dev);  in sg2042_mcu_write()  local
225 	guard(mutex)(&mcu->mutex);  in sg2042_mcu_write()
229 		hyst_temp = i2c_smbus_read_byte_data(mcu->client,  in sg2042_mcu_write()
238 		crit_temp = i2c_smbus_read_byte_data(mcu->client,  in sg2042_mcu_write()
247 		return -EOPNOTSUPP;  in sg2042_mcu_write()
251 	 * ensure hyst_temp is smaller to avoid MCU from  in sg2042_mcu_write()
255 		return -EINVAL;  in sg2042_mcu_write()
257 	return i2c_smbus_write_byte_data(mcu->client, reg, temp);  in sg2042_mcu_write()
295 static void sg2042_mcu_debugfs_init(struct sg2042_mcu_data *mcu,  in sg2042_mcu_debugfs_init()  argument
298 	mcu->debugfs = debugfs_create_dir(dev_name(dev), sgmcu_debugfs);  in sg2042_mcu_debugfs_init()
300 	debugfs_create_file("firmware_version", 0444, mcu->debugfs,  in sg2042_mcu_debugfs_init()
301 			    mcu, &firmware_version_fops);  in sg2042_mcu_debugfs_init()
302 	debugfs_create_file("pcb_version", 0444, mcu->debugfs, mcu,  in sg2042_mcu_debugfs_init()
304 	debugfs_create_file("mcu_type", 0444, mcu->debugfs, mcu,  in sg2042_mcu_debugfs_init()
306 	debugfs_create_file("board_type", 0444, mcu->debugfs, mcu,  in sg2042_mcu_debugfs_init()
312 	struct device *dev = &client->dev;  in sg2042_mcu_i2c_probe()
313 	struct sg2042_mcu_data *mcu;  in sg2042_mcu_i2c_probe()  local
316 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA |  in sg2042_mcu_i2c_probe()
318 		return -ENODEV;  in sg2042_mcu_i2c_probe()
320 	mcu = devm_kmalloc(dev, sizeof(*mcu), GFP_KERNEL);  in sg2042_mcu_i2c_probe()
321 	if (!mcu)  in sg2042_mcu_i2c_probe()
322 		return -ENOMEM;  in sg2042_mcu_i2c_probe()
324 	mutex_init(&mcu->mutex);  in sg2042_mcu_i2c_probe()
325 	mcu->client = client;  in sg2042_mcu_i2c_probe()
327 	i2c_set_clientdata(client, mcu);  in sg2042_mcu_i2c_probe()
330 							 mcu,  in sg2042_mcu_i2c_probe()
336 	sg2042_mcu_debugfs_init(mcu, dev);  in sg2042_mcu_i2c_probe()
343 	struct sg2042_mcu_data *mcu = i2c_get_clientdata(client);  in sg2042_mcu_i2c_remove()  local
345 	debugfs_remove_recursive(mcu->debugfs);  in sg2042_mcu_i2c_remove()
349 	{ "sg2042-hwmon-mcu", 0 },
355 	{ .compatible = "sophgo,sg2042-hwmon-mcu" },
362 		.name = "sg2042-mcu",
373 	sgmcu_debugfs = debugfs_create_dir("sg2042-mcu", NULL);  in sg2042_mcu_init()
387 MODULE_DESCRIPTION("MCU I2C driver for SG2042 soc platform");