boards/stm32f3*: adapt to new clock configuration

boards/nucleo-f302r8/include/periph_conf.h

@@ -24,7 +24,14 @@
 #define PERIPH_CONF_H
 
 /* This board provides an LSE */
-#define CLOCK_LSE            (1)
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE    1
+#endif
+
+/* This board provides an HSE */
+#ifndef CONFIG_BOARD_HAS_HSE
+#define CONFIG_BOARD_HAS_HSE    1
+#endif
 
 #include "periph_cpu.h"
 #include "f1f3/cfg_clock_default.h"

boards/nucleo-f303k8/include/periph_conf.h

@@ -19,12 +19,14 @@
 #ifndef PERIPH_CONF_H
 #define PERIPH_CONF_H
 
-/* No HSE available for this board */
-#define CLOCK_HSE           (0U)
-
-/* Adjust PLL prescalers to reach 72MHz sysclock */
-#define CLOCK_PLL_PREDIV    (2)
-#define CLOCK_PLL_MUL       (16)
+/* Adjust PLL factors:
+  - On nucleo-f303k8, there's no HSE and PREDIV is hard-wired to 2
+  - to reach the maximum possible system clock (64MHz) set PLL_MUL to 16
+    so system clock = (HSI8 / 2) * 16 = 64MHz */
+#define CONFIG_CLOCK_PLL_PREDIV     (2)
+#ifndef CONFIG_CLOCK_PLL_MUL
+#define CONFIG_CLOCK_PLL_MUL        (16)
+#endif
 
 #include "periph_cpu.h"
 #include "f1f3/cfg_clock_default.h"

boards/nucleo-f303re/include/periph_conf.h

@@ -22,7 +22,14 @@
 #define PERIPH_CONF_H
 
 /* This board provides an LSE */
-#define CLOCK_LSE            (1)
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE    1
+#endif
+
+/* This board provides an HSE */
+#ifndef CONFIG_BOARD_HAS_HSE
+#define CONFIG_BOARD_HAS_HSE    1
+#endif
 
 #include "periph_cpu.h"
 #include "f1f3/cfg_clock_default.h"

boards/nucleo-f303ze/include/periph_conf.h

@@ -20,7 +20,14 @@
 #define PERIPH_CONF_H
 
 /* This board provides an LSE */
-#define CLOCK_LSE            (1)
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE    1
+#endif
+
+/* This board provides an HSE */
+#ifndef CONFIG_BOARD_HAS_HSE
+#define CONFIG_BOARD_HAS_HSE    1
+#endif
 
 #include "periph_cpu.h"
 #include "f1f3/cfg_clock_default.h"

boards/nucleo-f334r8/include/periph_conf.h

@@ -21,7 +21,14 @@
 #define PERIPH_CONF_H
 
 /* This board provides an LSE */
-#define CLOCK_LSE            (1)
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE    1
+#endif
+
+/* This board provides an HSE */
+#ifndef CONFIG_BOARD_HAS_HSE
+#define CONFIG_BOARD_HAS_HSE    1
+#endif
 
 #include "periph_cpu.h"
 #include "f1f3/cfg_clock_default.h"

boards/stm32f3discovery/include/periph_conf.h

@@ -19,6 +19,11 @@
 #ifndef PERIPH_CONF_H
 #define PERIPH_CONF_H
 
+/* This board provides an HSE */
+#ifndef CONFIG_BOARD_HAS_HSE
+#define CONFIG_BOARD_HAS_HSE    1
+#endif
+
 #include "periph_cpu.h"
 #include "f1f3/cfg_clock_default.h"