hwmon: (aquacomputer_d5next) Add D5 Next fan control support

Define pump and fan speed register offsets in
D5 Next control report, as well as its size, to expose PWM fan control.

Originally-from: Jack Doan <me@jackdoan.com>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20220717171412.11142-1-savicaleksa83@gmail.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/aquacomputer_d5next.c

@@ -71,8 +71,12 @@ static u8 secondary_ctrl_report[] = {
 #define D5NEXT_PUMP_OFFSET		0x6c
 #define D5NEXT_FAN_OFFSET		0x5f
 #define D5NEXT_5V_VOLTAGE		0x39
+#define D5NEXT_CTRL_REPORT_SIZE		0x329
 static u8 d5next_sensor_fan_offsets[] = { D5NEXT_PUMP_OFFSET, D5NEXT_FAN_OFFSET };
 
+/* Pump and fan speed registers in D5 Next control report (from 0-100%) */
+static u16 d5next_ctrl_fan_offsets[] = { 0x97, 0x42 };
+
 /* Register offsets for the Farbwerk RGB controller */
 #define FARBWERK_NUM_SENSORS		4
 #define FARBWERK_SENSOR_START		0x2f
@@ -667,9 +671,11 @@ static int aqc_probe(struct hid_device *hdev, const struct hid_device_id *id)
 
 		priv->num_fans = D5NEXT_NUM_FANS;
 		priv->fan_sensor_offsets = d5next_sensor_fan_offsets;
+		priv->fan_ctrl_offsets = d5next_ctrl_fan_offsets;
 		priv->num_temp_sensors = D5NEXT_NUM_SENSORS;
 		priv->temp_sensor_start_offset = D5NEXT_COOLANT_TEMP;
 		priv->power_cycle_count_offset = D5NEXT_POWER_CYCLES;
+		priv->buffer_size = D5NEXT_CTRL_REPORT_SIZE;
 
 		priv->temp_label = label_d5next_temp;
 		priv->speed_label = label_d5next_speeds;