FS2500 and RS4021xs+ power issues

[fbelavenuto]

I got this messages below (no relative to the discs), maybe some work is necessary yet?

Originally posted by @fbelavenuto in fbelavenuto/arpl-addons#11 (comment)

[PeterSuh-Q3]

I want to look at the changes in the warning messages of @puri and dual PSUs and single PSU.
RS3618xs, a single PSU model, is additionally included as an m shell model.

There was no power warning message on this RackStation model, which is a single PSU.

https://xpenology.com/forum/topic/64347-rs3618xs-single-psu-loader-development-thread/

[Puri12]

I think we need to complete the psu code of redpill-lkm/shim/bios/bios_hwmon_shim.c by referring to the code below in linux-4.4.x/drivers/hwmon/pmbus/pmbus_core.c.

#ifdef CONFIG_SYNO_PMBUS_FEATURES
int syno_get_pmbus_status(struct _SYNO_HWMON_SENSOR_TYPE *PsuStatus, int psu_no)
{
	struct i2c_client *client;
	struct pmbus_data *data;
	struct pmbus_sensor *sensor;
	int ret = -1;
	int i = 0;

	if (NULL == PsuStatus){
		return -ENODEV;
	}

	for (i = 0 ; i < psu_no ; i++) {
		client = syno_find_pmbus_client(i+1);

		if (NULL == client) {
			printk("pmbus: client not found.\n");
			return -ENODEV;
		}

		data = i2c_get_clientdata(client);
		for (sensor = data->sensors; sensor; sensor = sensor->next) {
			if (!data->valid || sensor->update) {
				sensor->data= _pmbus_read_word_data(client, sensor->page,sensor->reg);
				if (!strcmp(sensor->name, "pin")) {
					snprintf(PsuStatus[i].sensor[0].value, MAX_SENSOR_VALUE, "%ld", pmbus_reg2data(data, sensor)/1000000);
				} else if (!strcmp(sensor->name, "pout")) {
					snprintf(PsuStatus[i].sensor[1].value, MAX_SENSOR_VALUE, "%ld", pmbus_reg2data(data, sensor)/1000000);
				} else if (!strcmp(sensor->name, "temp")) {
					snprintf(PsuStatus[i].sensor[2].value, MAX_SENSOR_VALUE, "%ld", pmbus_reg2data(data, sensor)/1000);
				} else if (!strcmp(sensor->name, "fan")) {
					snprintf(PsuStatus[i].sensor[3].value, MAX_SENSOR_VALUE, "%ld", pmbus_reg2data(data, sensor));
				} else if (!strcmp(sensor->name, "Status")) {
					snprintf(PsuStatus[i].sensor[4].value, MAX_SENSOR_VALUE, "0x%x", sensor->data);
				}
			}
		}
	}
	ret = 0;

	return ret;
}
#endif /* CONFIG_SYNO_PMBUS_FEATURES */

And the code above seems to be related to this error as well.

[41347.736099] Cannot get i2c adapter!
[41347.738059] /source/synobios/broadwellnk/broadwellnk_common.c:1329 return error!