TimJTi commented on code in PR #16303:
URL: https://github.com/apache/nuttx/pull/16303#discussion_r2072388141
##########
arch/arm/src/sama5/sam_systemreset.c:
##########
@@ -35,13 +35,63 @@
#include "arm_internal.h"
#include "hardware/sam_rstc.h"
+#include "sam_systemreset.h"
#ifdef CONFIG_SAMA5_SYSTEMRESET
/****************************************************************************
* Public Functions
****************************************************************************/
+/****************************************************************************
+ * Name: sam_get_reset_cause
+ *
+ * Description:
+ * Get cause of the last CPU reset. This is done by reading reset status
+ * registger.
+ *
+ * Returned Value:
+ * CPU reset cause in form of macros defined in sam_systemreset.h. This is
+ * to avoid passing boardctl dependent structure to architecture layer.
+ * Board level specific code should include sam_systemreset.h and set
+ * boardctl result according to that. -1 is returned in case of invalid
+ * value in status register.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BOARDCTL_RESET_CAUSE
+int sam_get_reset_cause(void)
+{
+ int ret;
+ uint32_t rstsr;
+
+ rstsr = getreg32(SAM_RSTC_SR);
+ switch (rstsr & RSTC_SR_RSTTYP_MASK)
+ {
+ case RSTC_SR_RSTTYP_PWRUP:
+ ret = SAMA5_RESET_PWRUP;
Review Comment:
> @xiaoxiang781216 ...
> I will change it, retest, and push again. I'll mark it back as draft for
now.
I did this away from my test set up and pushed it...but now see that I have
board-specific code that mapped the SAMA5 reset cause names to the boardctl
names, which is probably what the samv7 did.
I will investigate properly next week and rework to the simplest/best/most
consistent solution rather than just hack it like I did earlier!
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