hwmon fixes for v5.18-rc6

- Work around a hardware problem in the delta-ahe50dc-fan driver
 
 - Explicitly disable PEC in PMBus core if not enabled
 
 - Fix negative temperature values in f71882fg driver
 
 - Fix warning on removal of adt7470 driver
 
 - Fix CROSSHAIR VI HERO name in asus_wmi_sensors driver
 
 - Fix build warning seen in xdpe12284 driver if
   CONFIG_SENSORS_XDPE122_REGULATOR is disabled
 
 - Fix type of 'ti,n-factor' in ti,tmp421 driver bindings
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Merge tag 'hwmon-for-v5.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:

 - Work around a hardware problem in the delta-ahe50dc-fan driver

 - Explicitly disable PEC in PMBus core if not enabled

 - Fix negative temperature values in f71882fg driver

 - Fix warning on removal of adt7470 driver

 - Fix CROSSHAIR VI HERO name in asus_wmi_sensors driver

 - Fix build warning seen in xdpe12284 driver if
   CONFIG_SENSORS_XDPE122_REGULATOR is disabled

 - Fix type of 'ti,n-factor' in ti,tmp421 driver bindings

* tag 'hwmon-for-v5.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (pmbus) delta-ahe50dc-fan: work around hardware quirk
  hwmon: (pmbus) disable PEC if not enabled
  hwmon: (f71882fg) Fix negative temperature
  dt-bindings: hwmon: ti,tmp421: Fix type for 'ti,n-factor'
  hwmon: (adt7470) Fix warning on module removal
  hwmon: (asus_wmi_sensors) Fix CROSSHAIR VI HERO name
  hwmon: (xdpe12284) Fix build warning seen if CONFIG_SENSORS_XDPE122_REGULATOR is disabled

Documentation/devicetree/bindings/hwmon/ti,tmp421.yaml

@@ -58,10 +58,9 @@ patternProperties:
         description: |
           The value (two's complement) to be programmed in the channel specific N correction register.
           For remote channels only.
-        $ref: /schemas/types.yaml#/definitions/uint32
-        items:
-          minimum: 0
-          maximum: 255
+        $ref: /schemas/types.yaml#/definitions/int32
+        minimum: -128
+        maximum: 127
 
     required:
       - reg

drivers/hwmon/adt7470.c

@@ -19,6 +19,7 @@
 #include <linux/log2.h>
 #include <linux/kthread.h>
 #include <linux/regmap.h>
+#include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/util_macros.h>
 
@@ -294,11 +295,10 @@ static int adt7470_update_thread(void *p)
 		adt7470_read_temperatures(data);
 		mutex_unlock(&data->lock);
 
-		set_current_state(TASK_INTERRUPTIBLE);
 		if (kthread_should_stop())
 			break;
 
-		schedule_timeout(msecs_to_jiffies(data->auto_update_interval));
+		schedule_timeout_interruptible(msecs_to_jiffies(data->auto_update_interval));
 	}
 
 	return 0;

drivers/hwmon/asus_wmi_sensors.c

@@ -71,7 +71,7 @@ static const struct dmi_system_id asus_wmi_dmi_table[] = {
 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("PRIME X399-A"),
 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("PRIME X470-PRO"),
 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VI EXTREME"),
-	DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VI HERO"),
+	DMI_EXACT_MATCH_ASUS_BOARD_NAME("CROSSHAIR VI HERO"),
 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VI HERO (WI-FI AC)"),
 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VII HERO"),
 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VII HERO (WI-FI)"),

drivers/hwmon/f71882fg.c

@@ -1578,8 +1578,9 @@ static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
 		temp *= 125;
 		if (sign)
 			temp -= 128000;
-	} else
-		temp = data->temp[nr] * 1000;
+	} else {
+		temp = ((s8)data->temp[nr]) * 1000;
+	}
 
 	return sprintf(buf, "%d\n", temp);
 }

drivers/hwmon/pmbus/delta-ahe50dc-fan.c

@@ -14,6 +14,21 @@
 
 #define AHE50DC_PMBUS_READ_TEMP4 0xd0
 
+static int ahe50dc_fan_write_byte(struct i2c_client *client, int page, u8 value)
+{
+	/*
+	 * The CLEAR_FAULTS operation seems to sometimes (unpredictably, perhaps
+	 * 5% of the time or so) trigger a problematic phenomenon in which the
+	 * fan speeds surge momentarily and at least some (perhaps all?) of the
+	 * system's power outputs experience a glitch.
+	 *
+	 * However, according to Delta it should be OK to simply not send any
+	 * CLEAR_FAULTS commands (the device doesn't seem to be capable of
+	 * reporting any faults anyway), so just blackhole them unconditionally.
+	 */
+	return value == PMBUS_CLEAR_FAULTS ? -EOPNOTSUPP : -ENODATA;
+}
+
 static int ahe50dc_fan_read_word_data(struct i2c_client *client, int page, int phase, int reg)
 {
 	/* temp1 in (virtual) page 1 is remapped to mfr-specific temp4 */
@@ -68,6 +83,7 @@ static struct pmbus_driver_info ahe50dc_fan_info = {
 		PMBUS_HAVE_VIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_FAN34 |
 		PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_STATUS_FAN34 | PMBUS_PAGE_VIRTUAL,
 	.func[1] = PMBUS_HAVE_TEMP | PMBUS_PAGE_VIRTUAL,
+	.write_byte = ahe50dc_fan_write_byte,
 	.read_word_data = ahe50dc_fan_read_word_data,
 };
 

drivers/hwmon/pmbus/pmbus_core.c

@@ -2326,6 +2326,9 @@ static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data,
 		data->has_status_word = true;
 	}
 
+	/* Make sure PEC is disabled, will be enabled later if needed */
+	client->flags &= ~I2C_CLIENT_PEC;
+
 	/* Enable PEC if the controller and bus supports it */
 	if (!(data->flags & PMBUS_NO_CAPABILITY)) {
 		ret = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY);

drivers/hwmon/pmbus/xdpe12284.c

@@ -124,7 +124,7 @@ static int xdpe122_identify(struct i2c_client *client,
 	return 0;
 }
 
-static const struct regulator_desc xdpe122_reg_desc[] = {
+static const struct regulator_desc __maybe_unused xdpe122_reg_desc[] = {
 	PMBUS_REGULATOR("vout", 0),
 	PMBUS_REGULATOR("vout", 1),
 };