Refactor use of STM32_SYSCLK (#14430)

* Refactor use of STM32_SYSCLK

* clang

drivers/led/apa102.c

@@ -25,7 +25,7 @@
 
 #        include "hal.h"
 #        if defined(STM32F0XX) || defined(STM32F1XX) || defined(STM32F3XX) || defined(STM32F4XX) || defined(STM32L0XX)
-#            define APA102_NOPS (100 / (1000000000L / (STM32_SYSCLK / 4)))  // This calculates how many loops of 4 nops to run to delay 100 ns
+#            define APA102_NOPS (100 / (1000000000L / (CPU_CLOCK / 4)))  // This calculates how many loops of 4 nops to run to delay 100 ns
 #        else
 #            error("APA102_NOPS configuration required")
 #            define APA102_NOPS 0  // this just pleases the compile so the above error is easier to spot

platforms/chibios/drivers/serial.c

@@ -19,7 +19,7 @@
 #    error "chSysPolledDelayX method not supported on this platform"
 #else
 #    undef wait_us
-#    define wait_us(x) chSysPolledDelayX(US2RTC(STM32_SYSCLK, x))
+#    define wait_us(x) chSysPolledDelayX(US2RTC(CPU_CLOCK, x))
 #endif
 
 #ifndef SELECT_SOFT_SERIAL_SPEED

platforms/chibios/drivers/ws2812.c

@@ -23,7 +23,7 @@
 #endif
 
 #define NUMBER_NOPS 6
-#define CYCLES_PER_SEC (STM32_SYSCLK / NUMBER_NOPS * NOP_FUDGE)
+#define CYCLES_PER_SEC (CPU_CLOCK / NUMBER_NOPS * NOP_FUDGE)
 #define NS_PER_SEC (1000000000L)  // Note that this has to be SIGNED since we want to be able to check for negative values of derivatives
 #define NS_PER_CYCLE (NS_PER_SEC / CYCLES_PER_SEC)
 #define NS_TO_CYCLES(n) ((n) / NS_PER_CYCLE)

platforms/chibios/drivers/ws2812_pwm.c

@@ -59,7 +59,7 @@
 
 /* --- PRIVATE CONSTANTS ---------------------------------------------------- */
 
-#define WS2812_PWM_FREQUENCY (STM32_SYSCLK / 2)                             /**< Clock frequency of PWM, must be valid with respect to system clock! */
+#define WS2812_PWM_FREQUENCY (CPU_CLOCK / 2)                                /**< Clock frequency of PWM, must be valid with respect to system clock! */
 #define WS2812_PWM_PERIOD (WS2812_PWM_FREQUENCY / WS2812_PWM_TARGET_PERIOD) /**< Clock period in ticks. 1 / 800kHz = 1.25 uS (as per datasheet) */
 
 /**

tmk_core/common/chibios/_wait.h

@@ -43,8 +43,6 @@ void wait_us(uint16_t duration);
 
 #include "_wait.c"
 
-#define CPU_CLOCK STM32_SYSCLK
-
 /* For GPIOs on ARM-based MCUs, the input pins are sampled by the clock of the bus
  * to which the GPIO is connected.
  * The connected buses differ depending on the various series of MCUs.

tmk_core/common/chibios/chibios_config.h

@@ -19,6 +19,11 @@
 #    define SPLIT_USB_DETECT  // Force this on when dedicated pin is not used
 #endif
 
+// STM32 compatibility
+#if defined(MCU_STM32)
+#    define CPU_CLOCK STM32_SYSCLK
+#endif
+
 #if defined(STM32F1XX)
 #    define USE_GPIOV1
 #endif
@@ -27,14 +32,13 @@
 #    define USE_I2CV1
 #endif
 
-// teensy
+// teensy compatibility
+#if defined(MCU_KINETIS)
+#    define CPU_CLOCK KINETIS_SYSCLK_FREQUENCY
+#endif
+
 #if defined(K20x) || defined(KL2x)
 #    define USE_I2CV1
 #    define USE_I2CV1_CONTRIB  // for some reason a bunch of ChibiOS-Contrib boards only have clock_speed
 #    define USE_GPIOV1
-#    define STM32_SYSCLK KINETIS_SYSCLK_FREQUENCY
-#endif
-
-#if defined(MK66F18)
-#    define STM32_SYSCLK KINETIS_SYSCLK_FREQUENCY
 #endif