atsamd: Move watchdog code to its own files

Move the watchdog code from main.c to watchdog.c and
samd51_watchdog.c.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

4 files changed, 49 insertions, 31 deletions

diff --git a/src/atsamd/Makefile b/src/atsamd/Makefile
index 79a664df..06be77c2 100644
--- a/src/atsamd/Makefile
+++ b/src/atsamd/Makefile
@@ -28,8 +28,10 @@ src-$(CONFIG_HAVE_GPIO_ADC) += atsamd/adc.c
 src-$(CONFIG_HAVE_GPIO_I2C) += atsamd/i2c.c
 src-$(CONFIG_HAVE_GPIO_SPI) += atsamd/spi.c
 src-$(CONFIG_HAVE_GPIO_HARD_PWM) += atsamd/hard_pwm.c
+src-$(CONFIG_MACH_SAMD21) += atsamd/watchdog.c
 src-$(CONFIG_MACH_SAMD21) += atsamd/clock.c atsamd/timer.c generic/timer_irq.c
 src-$(CONFIG_MACH_SAMD21) += ../lib/samd21/samd21a/gcc/gcc/startup_samd21.c
+src-$(CONFIG_MACH_SAMD51) += atsamd/samd51_watchdog.c
 src-$(CONFIG_MACH_SAMD51) += atsamd/samd51_clock.c generic/armcm_timer.c
 src-$(CONFIG_MACH_SAMD51) += ../lib/samd51/samd51a/gcc/gcc/startup_samd51.c
 
diff --git a/src/atsamd/main.c b/src/atsamd/main.c
index 5cd85d44..9233662f 100644
--- a/src/atsamd/main.c
+++ b/src/atsamd/main.c
@@ -5,41 +5,11 @@
 // This file may be distributed under the terms of the GNU GPLv3 license.
 
 #include "command.h" // DECL_CONSTANT
-#include "internal.h" // WDT
+#include "internal.h" // NVIC_SystemReset
 #include "sched.h" // sched_main
 
 DECL_CONSTANT(MCU, CONFIG_MCU);
 
-
-/****************************************************************
- * watchdog handler
- ****************************************************************/
-
-void
-watchdog_reset(void)
-{
-    WDT->CLEAR.reg = 0xa5;
-}
-DECL_TASK(watchdog_reset);
-
-void
-watchdog_init(void)
-{
-#if CONFIG_MACH_SAMD21
-    WDT->CONFIG.reg = WDT_CONFIG_PER_16K; // 500ms timeout
-    WDT->CTRL.reg = WDT_CTRL_ENABLE;
-#elif CONFIG_MACH_SAMD51
-    WDT->CONFIG.reg = WDT_CONFIG_PER(6); // 500ms timeout
-    WDT->CTRLA.reg = WDT_CTRLA_ENABLE;
-#endif
-}
-DECL_INIT(watchdog_init);
-
-
-/****************************************************************
- * misc functions
- ****************************************************************/
-
 void
 command_reset(uint32_t *args)
 {
diff --git a/src/atsamd/samd51_watchdog.c b/src/atsamd/samd51_watchdog.c
new file mode 100644
index 00000000..899b521f
--- /dev/null
+++ b/src/atsamd/samd51_watchdog.c
@@ -0,0 +1,23 @@
+// Watchdog handler on SAMD21 boards
+//
+// Copyright (C) 2018-2019  Kevin O'Connor <kevin@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU GPLv3 license.
+
+#include "internal.h" // WDT
+#include "sched.h" // DECL_TASK
+
+void
+watchdog_reset(void)
+{
+    WDT->CLEAR.reg = 0xa5;
+}
+DECL_TASK(watchdog_reset);
+
+void
+watchdog_init(void)
+{
+    WDT->CONFIG.reg = WDT_CONFIG_PER(6); // 500ms timeout
+    WDT->CTRLA.reg = WDT_CTRLA_ENABLE;
+}
+DECL_INIT(watchdog_init);
diff --git a/src/atsamd/watchdog.c b/src/atsamd/watchdog.c
new file mode 100644
index 00000000..aacf8fb7
--- /dev/null
+++ b/src/atsamd/watchdog.c
@@ -0,0 +1,23 @@
+// Watchdog handler on SAMD21 boards
+//
+// Copyright (C) 2018-2019  Kevin O'Connor <kevin@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU GPLv3 license.
+
+#include "internal.h" // WDT
+#include "sched.h" // DECL_TASK
+
+void
+watchdog_reset(void)
+{
+    WDT->CLEAR.reg = 0xa5;
+}
+DECL_TASK(watchdog_reset);
+
+void
+watchdog_init(void)
+{
+    WDT->CONFIG.reg = WDT_CONFIG_PER_16K; // 500ms timeout
+    WDT->CTRL.reg = WDT_CTRL_ENABLE;
+}
+DECL_INIT(watchdog_init);