[HACK] darp10: Set FAN2 duty to FAN1

This model has a second CPU fan connected to PWM3.

Signed-off-by: Tim Crawford <tcrawford@system76.com>

src/board/system76/common/fan.c

@@ -73,6 +73,10 @@ void fan_duty_set(uint8_t peci_fan_duty, uint8_t dgpu_fan_duty) __reentrant {
         TRACE("PECI fan_duty_raw=%d\n", peci_fan_duty);
         last_duty_peci = peci_fan_duty = fan_smooth(last_duty_peci, peci_fan_duty);
         DCR2 = fan_max ? MAX_FAN_SPEED : peci_fan_duty;
+#if HAVE_CPU_FAN2
+        // FIXME: Handle better
+        DCR3 = fan_max ? MAX_FAN_SPEED : peci_fan_duty;
+#endif
         TRACE("PECI fan_duty_smoothed=%d\n", peci_fan_duty);
     }
 

src/board/system76/common/pwm.c

@@ -25,6 +25,9 @@ void pwm_init(void) {
 
     // Turn off CPU fan (temperature control in peci_get_fan_duty)
     DCR2 = 0;
+#if HAVE_CPU_FAN2
+    DCR3 = 0;
+#endif
 
 #if CONFIG_EC_ITE_IT5570E || CONFIG_EC_ITE_IT5571E
     // Reload counters when they reach 0 instead of immediately

src/board/system76/common/scratch.c

@@ -18,6 +18,9 @@ uint8_t __code __at(SCRATCH_OFFSET) scratch_rom[] = {
 void scratch_trampoline(void) {
     // Set fans to 100%
     DCR2 = 0xFF;
+#if HAVE_CPU_FAN2
+    DCR3 = 0xFF;
+#endif
 #if HAVE_DGPU
     DCR4 = 0xFF;
 #endif

src/board/system76/darp10/board.mk

@@ -38,5 +38,7 @@ CFLAGS += \
 	-DPOWER_LIMIT_AC=65 \
 	-DPOWER_LIMIT_DC=45
 
+CFLAGS += -DHAVE_CPU_FAN2=1
+
 # Add common code
 include src/board/system76/common/common.mk