From 0ca4a56a0449d17a497ba610d4cee41c914ff50e Mon Sep 17 00:00:00 2001
From: Joel Challis <git@zvecr.com>
Date: Tue, 14 Sep 2021 03:18:36 +0100
Subject: [PATCH] Refactor use of STM32_SYSCLK (#14430)

* Refactor use of STM32_SYSCLK

* clang
---
 drivers/led/apa102.c                     |  2 +-
 platforms/chibios/drivers/serial.c       |  2 +-
 platforms/chibios/drivers/ws2812.c       |  2 +-
 platforms/chibios/drivers/ws2812_pwm.c   |  2 +-
 tmk_core/common/chibios/_wait.h          |  2 --
 tmk_core/common/chibios/chibios_config.h | 16 ++++++++++------
 6 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/drivers/led/apa102.c b/drivers/led/apa102.c
index 7396dc3c551..19e0bfc1890 100644
--- a/drivers/led/apa102.c
+++ b/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
diff --git a/platforms/chibios/drivers/serial.c b/platforms/chibios/drivers/serial.c
index f54fbcee4ec..ef6f0aa8d5f 100644
--- a/platforms/chibios/drivers/serial.c
+++ b/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
diff --git a/platforms/chibios/drivers/ws2812.c b/platforms/chibios/drivers/ws2812.c
index 0d12e2fb79a..ffcdcff2421 100644
--- a/platforms/chibios/drivers/ws2812.c
+++ b/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)
diff --git a/platforms/chibios/drivers/ws2812_pwm.c b/platforms/chibios/drivers/ws2812_pwm.c
index e6af55b6b36..e7080b036f8 100644
--- a/platforms/chibios/drivers/ws2812_pwm.c
+++ b/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) */
 
 /**
diff --git a/tmk_core/common/chibios/_wait.h b/tmk_core/common/chibios/_wait.h
index b740afbd242..2f36c64a2e6 100644
--- a/tmk_core/common/chibios/_wait.h
+++ b/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.
diff --git a/tmk_core/common/chibios/chibios_config.h b/tmk_core/common/chibios/chibios_config.h
index 23c65f94284..4515b025dac 100644
--- a/tmk_core/common/chibios/chibios_config.h
+++ b/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