Backlight - Carve out a better location for private driver functionality (#8329)

* rename backlight_soft to match rules.mk

* rename backlight_soft to match rules.mk - update common_features

* Carve out a better location for private driver backlight functionality

common_features.mk

@@ -297,24 +297,27 @@ VALID_BACKLIGHT_TYPES := pwm software custom
 BACKLIGHT_ENABLE ?= no
 BACKLIGHT_DRIVER ?= pwm
 ifeq ($(strip $(BACKLIGHT_ENABLE)), yes)
-    SRC += $(QUANTUM_DIR)/process_keycode/process_backlight.c
     ifeq ($(filter $(BACKLIGHT_DRIVER),$(VALID_BACKLIGHT_TYPES)),)
         $(error BACKLIGHT_DRIVER="$(BACKLIGHT_DRIVER)" is not a valid backlight type)
     endif
 
     COMMON_VPATH += $(QUANTUM_DIR)/backlight
     SRC += $(QUANTUM_DIR)/backlight/backlight.c
+    SRC += $(QUANTUM_DIR)/process_keycode/process_backlight.c
     OPT_DEFS += -DBACKLIGHT_ENABLE
 
     ifeq ($(strip $(BACKLIGHT_DRIVER)), custom)
         OPT_DEFS += -DBACKLIGHT_CUSTOM_DRIVER
-    else ifeq ($(strip $(BACKLIGHT_DRIVER)), software)
-        SRC += $(QUANTUM_DIR)/backlight/backlight_soft.c
     else
-        ifeq ($(PLATFORM),AVR)
-            SRC += $(QUANTUM_DIR)/backlight/backlight_avr.c
+        SRC += $(QUANTUM_DIR)/backlight/backlight_driver_common.c
+        ifeq ($(strip $(BACKLIGHT_DRIVER)), pwm)
+            ifeq ($(PLATFORM),AVR)
+                SRC += $(QUANTUM_DIR)/backlight/backlight_avr.c
+            else
+                SRC += $(QUANTUM_DIR)/backlight/backlight_arm.c
+            endif
         else
-            SRC += $(QUANTUM_DIR)/backlight/backlight_arm.c
+            SRC += $(QUANTUM_DIR)/backlight/backlight_$(strip $(BACKLIGHT_DRIVER)).c
         endif
     endif
 endif

quantum/backlight/backlight.c

@@ -20,6 +20,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "eeconfig.h"
 #include "debug.h"
 
+#if defined(STM32F0XX) || defined(STM32F0xx)
+#    pragma message("Backlight support for STMF072 has had limited testing, YMMV. If unsure, set 'BACKLIGHT_ENABLE = no' in your rules.mk")
+#endif
+
 backlight_config_t backlight_config;
 
 #ifdef BACKLIGHT_BREATHING
@@ -27,51 +31,6 @@ backlight_config_t backlight_config;
 static uint8_t breathing_period = BREATHING_PERIOD;
 #endif
 
-#ifndef BACKLIGHT_CUSTOM_DRIVER
-#    if defined(BACKLIGHT_PINS)
-static const pin_t backlight_pins[] = BACKLIGHT_PINS;
-#        ifndef BACKLIGHT_LED_COUNT
-#            define BACKLIGHT_LED_COUNT (sizeof(backlight_pins) / sizeof(pin_t))
-#        endif
-
-#        define FOR_EACH_LED(x)                                 \
-            for (uint8_t i = 0; i < BACKLIGHT_LED_COUNT; i++) { \
-                pin_t backlight_pin = backlight_pins[i];        \
-                { x }                                           \
-            }
-#    else
-// we support only one backlight pin
-static const pin_t backlight_pin = BACKLIGHT_PIN;
-#        define FOR_EACH_LED(x) x
-#    endif
-
-static inline void backlight_on(pin_t backlight_pin) {
-#    if BACKLIGHT_ON_STATE == 0
-    writePinLow(backlight_pin);
-#    else
-    writePinHigh(backlight_pin);
-#    endif
-}
-
-static inline void backlight_off(pin_t backlight_pin) {
-#    if BACKLIGHT_ON_STATE == 0
-    writePinHigh(backlight_pin);
-#    else
-    writePinLow(backlight_pin);
-#    endif
-}
-
-void backlight_pins_init(void) {
-    // Setup backlight pin as output and output to off state.
-    FOR_EACH_LED(setPinOutput(backlight_pin); backlight_off(backlight_pin);)
-}
-
-void backlight_pins_on(void) { FOR_EACH_LED(backlight_on(backlight_pin);) }
-
-void backlight_pins_off(void) { FOR_EACH_LED(backlight_off(backlight_pin);) }
-
-#endif
-
 /** \brief Backlight initialization
  *
  * FIXME: needs doc

quantum/backlight/backlight.h

@@ -44,10 +44,6 @@ typedef union {
     };
 } backlight_config_t;
 
-void backlight_pins_init(void);
-void backlight_pins_on(void);
-void backlight_pins_off(void);
-
 void    backlight_init(void);
 void    backlight_toggle(void);
 void    backlight_enable(void);
@@ -79,11 +75,11 @@ void    breathing_period_default(void);
 void    breathing_period_inc(void);
 void    breathing_period_dec(void);
 
+void breathing_toggle(void);
+
 // implementation specific
 void breathing_enable(void);
 void breathing_disable(void);
-void breathing_toggle(void);
 bool is_breathing(void);
 void breathing_pulse(void);
-void breathing_task(void);
 #endif

quantum/backlight/backlight_arm.c

@@ -6,10 +6,6 @@
 // TODO: remove short term bodge when refactoring BACKLIGHT_CUSTOM_DRIVER out
 #ifdef BACKLIGHT_PIN
 
-#    if defined(STM32F0XX) || defined(STM32F0xx)
-#        pragma message("Backlight support for STMF072 has had limited testing, YMMV. If unsure, set 'BACKLIGHT_ENABLE = no' in your rules.mk")
-#    endif
-
 // GPIOV2 && GPIOV3
 #    ifndef BACKLIGHT_PAL_MODE
 #        define BACKLIGHT_PAL_MODE 2

quantum/backlight/backlight_avr.c

@@ -1,11 +1,8 @@
 #include "quantum.h"
 #include "backlight.h"
+#include "backlight_driver_common.h"
 #include "debug.h"
 
-#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:
 //
 //   1. Hardware PWM when backlight is wired to a PWM pin.

quantum/backlight/backlight_driver_common.c

@@ -0,0 +1,49 @@
+#include "quantum.h"
+#include "backlight.h"
+#include "backlight_driver_common.h"
+
+#if !defined(BACKLIGHT_PIN) && !defined(BACKLIGHT_PINS)
+#    error "Backlight pin/pins not defined. Please configure."
+#endif
+
+#if defined(BACKLIGHT_PINS)
+static const pin_t backlight_pins[] = BACKLIGHT_PINS;
+#    ifndef BACKLIGHT_LED_COUNT
+#        define BACKLIGHT_LED_COUNT (sizeof(backlight_pins) / sizeof(pin_t))
+#    endif
+
+#    define FOR_EACH_LED(x)                                 \
+        for (uint8_t i = 0; i < BACKLIGHT_LED_COUNT; i++) { \
+            pin_t backlight_pin = backlight_pins[i];        \
+            { x }                                           \
+        }
+#else
+// we support only one backlight pin
+static const pin_t backlight_pin = BACKLIGHT_PIN;
+#    define FOR_EACH_LED(x) x
+#endif
+
+static inline void backlight_on(pin_t backlight_pin) {
+#if BACKLIGHT_ON_STATE == 0
+    writePinLow(backlight_pin);
+#else
+    writePinHigh(backlight_pin);
+#endif
+}
+
+static inline void backlight_off(pin_t backlight_pin) {
+#if BACKLIGHT_ON_STATE == 0
+    writePinHigh(backlight_pin);
+#else
+    writePinLow(backlight_pin);
+#endif
+}
+
+void backlight_pins_init(void) {
+    // Setup backlight pin as output and output to off state.
+    FOR_EACH_LED(setPinOutput(backlight_pin); backlight_off(backlight_pin);)
+}
+
+void backlight_pins_on(void) { FOR_EACH_LED(backlight_on(backlight_pin);) }
+
+void backlight_pins_off(void) { FOR_EACH_LED(backlight_off(backlight_pin);) }

quantum/backlight/backlight_driver_common.h

@@ -0,0 +1,7 @@
+#pragma once
+
+void backlight_pins_init(void);
+void backlight_pins_on(void);
+void backlight_pins_off(void);
+
+void breathing_task(void);

quantum/backlight/backlight_soft.c → quantum/backlight/backlight_software.c

@@ -1,9 +1,6 @@
 #include "quantum.h"
 #include "backlight.h"
-
-#if !defined(BACKLIGHT_PIN) && !defined(BACKLIGHT_PINS)
-#    error "Backlight pin/pins not defined. Please configure."
-#endif
+#include "backlight_driver_common.h"
 
 #ifdef BACKLIGHT_BREATHING
 #    error "Backlight breathing is not available for software PWM. Please disable."