[RFT PATCH 1/3] hwmon: (nct6775) Fix target temp and tolerance for NCT6106/6116/6126

[Guenter Roeck <linux@roeck-us.net>]

In nct6775_probe(), the nct6106, nct6116, and nct6126 chip cases leave
target_temp_mask, tolerance_mask, and speed_tolerance_limit
zero-initialized.

As a result, reading pwm*_target_temp from sysfs always returns 0,
writing to pwm*_target_temp, pwm*_temp_tolerance,
pwm*_crit_temp_tolerance, or fan*_tolerance clamps user-supplied values
to 0, and pwm_update_registers() fails to clear existing tolerance bits
in REG_FAN_MODE when updating fan control modes.

Initialize target_temp_mask to 0xff, tolerance_mask to 0x07, and
speed_tolerance_limit to 63 for NCT6106, NCT6116, and NCT6126, matching
the hardware register layout shared with NCT5525 and NCT6776+.

Fixes: 6c009501ff20 ("hwmon: (nct6775) Add support for NCT6102D/6106D")
Fixes: 29c7cb485b32 ("hwmon: (nct6775) Integrate new model nct6116")
Fixes: 437b3c2a4bdc ("hwmon: (nct6775) Add support for NCT6126D")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Link: https://sashiko.dev/#/bug/linux-76f191d0-4c79-4982-887e-e5c9a2ed7136
Cc: Anton Lundin <glance@ac2.se>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/hwmon/nct6775-core.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/hwmon/nct6775-core.c b/drivers/hwmon/nct6775-core.c
index 83083a0e9302..192b52750db5 100644
--- a/drivers/hwmon/nct6775-core.c
+++ b/drivers/hwmon/nct6775-core.c
@@ -3712,6 +3712,9 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data,
 
 		data->fan_from_reg = fan_from_reg13;
 		data->fan_from_reg_min = fan_from_reg13;
+		data->target_temp_mask = 0xff;
+		data->tolerance_mask = 0x07;
+		data->speed_tolerance_limit = 63;
 
 		data->temp_label = nct6776_temp_label;
 		data->temp_mask = NCT6776_TEMP_MASK;
@@ -3788,6 +3791,9 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data,
 
 		data->fan_from_reg = fan_from_reg13;
 		data->fan_from_reg_min = fan_from_reg13;
+		data->target_temp_mask = 0xff;
+		data->tolerance_mask = 0x07;
+		data->speed_tolerance_limit = 63;
 
 		data->temp_label = nct6776_temp_label;
 		data->temp_mask = NCT6776_TEMP_MASK;
@@ -3865,6 +3871,9 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data,
 
 		data->fan_from_reg = fan_from_reg13;
 		data->fan_from_reg_min = fan_from_reg13;
+		data->target_temp_mask = 0xff;
+		data->tolerance_mask = 0x07;
+		data->speed_tolerance_limit = 63;
 
 		data->temp_label = nct6776_temp_label;
 		data->temp_mask = NCT6776_TEMP_MASK;
-- 
2.45.2