Prune out pure software pwm && custom driver && remove wrapping BACKLIGHT_PIN (#8041)

quantum/backlight/backlight_avr.c

@@ -2,7 +2,9 @@
 #include "backlight.h"
 #include "debug.h"
 
-#if defined(BACKLIGHT_ENABLE) && (defined(BACKLIGHT_PIN) || defined(BACKLIGHT_PINS))
+#if !defined(BACKLIGHT_PIN) && !defined(BACKLIGHT_PINS)
+#    error "Backlight pin/pins not defined. Please configure."
+#endif
 
 // This logic is a bit complex, we support 3 setups:
 //
@@ -122,9 +124,7 @@
 #        define COMxx1 COM1B1
 #        define OCRxx OCR1B
 #    endif
-#    else
+#elif !defined(B5_AUDIO) && !defined(B6_AUDIO) && !defined(B7_AUDIO)
-#        if !defined(BACKLIGHT_CUSTOM_DRIVER)
-#            if !defined(B5_AUDIO) && !defined(B6_AUDIO) && !defined(B7_AUDIO)
 // Timer 1 is not in use by Audio feature, Backlight can use it
 #    pragma message "Using hardware timer 1 with software PWM"
 #    define HARDWARE_PWM
@@ -158,14 +158,10 @@
 
 #    define OCIExA OCIE3A
 #    define OCRxx OCR3A
+#elif defined(BACKLIGHT_CUSTOM_DRIVER)
+error("Please set 'BACKLIGHT_DRIVER = custom' within rules.mk")
 #else
-#                pragma message "Audio in use - using pure software PWM"
+error("Please set 'BACKLIGHT_DRIVER = software' within rules.mk")
-#                define NO_HARDWARE_PWM
-#            endif
-#        else
-#            pragma message "Custom driver defined - using pure software PWM"
-#            define NO_HARDWARE_PWM
-#        endif
 #endif
 
 #ifndef BACKLIGHT_ON_STATE
@@ -188,7 +184,7 @@ void backlight_off(pin_t backlight_pin) {
 #endif
 }
 
-#    if defined(NO_HARDWARE_PWM) || defined(BACKLIGHT_PWM_TIMER)  // pwm through software
+#ifdef BACKLIGHT_PWM_TIMER  // pwm through software
 
 // we support multiple backlight pins
 #    ifndef BACKLIGHT_LED_COUNT
@@ -234,39 +230,6 @@ static const pin_t backlight_pin = BACKLIGHT_PIN;
 
 #endif
 
-#    ifdef NO_HARDWARE_PWM
-void backlight_init_ports(void) {
-    // Setup backlight pin as output and output to on state.
-    FOR_EACH_LED(setPinOutput(backlight_pin); backlight_on(backlight_pin);)
-
-#        ifdef BACKLIGHT_BREATHING
-    if (is_backlight_breathing()) {
-        breathing_enable();
-    }
-#        endif
-}
-
-uint8_t backlight_tick = 0;
-
-#        ifndef BACKLIGHT_CUSTOM_DRIVER
-void backlight_task(void) {
-    if ((0xFFFF >> ((BACKLIGHT_LEVELS - get_backlight_level()) * ((BACKLIGHT_LEVELS + 1) / 2))) & (1 << backlight_tick)) {
-        FOR_EACH_LED(backlight_on(backlight_pin);)
-    } else {
-        FOR_EACH_LED(backlight_off(backlight_pin);)
-    }
-    backlight_tick = (backlight_tick + 1) % 16;
-}
-#        endif
-
-#        ifdef BACKLIGHT_BREATHING
-#            ifndef BACKLIGHT_CUSTOM_DRIVER
-#                error "Backlight breathing only available with hardware PWM. Please disable."
-#            endif
-#        endif
-
-#    else  // hardware pwm through timer
-
 #ifdef BACKLIGHT_PWM_TIMER
 
 // The idea of software PWM assisted by hardware timers is the following
@@ -329,7 +292,6 @@ static uint16_t cie_lightness(uint16_t v) {
 // range for val is [0..TIMER_TOP]. PWM pin is high while the timer count is below val.
 static inline void set_pwm(uint16_t val) { OCRxx = val; }
 
-#        ifndef BACKLIGHT_CUSTOM_DRIVER
 void backlight_set(uint8_t level) {
     if (level > BACKLIGHT_LEVELS) level = BACKLIGHT_LEVELS;
 
@@ -360,7 +322,6 @@ void backlight_set(uint8_t level) {
 }
 
 void backlight_task(void) {}
-#        endif  // BACKLIGHT_CUSTOM_DRIVER
 
 #ifdef BACKLIGHT_BREATHING
 
@@ -518,7 +479,3 @@ void backlight_init_ports(void) {
     }
 #endif
 }
-
-#    endif  // hardware backlight
-
-#endif  // backlight