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board/samv7: add support for BOARDCTL_RESET_CAUSE command

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This commit adds support for board control command that retrieves the
cause of last reset from HW.

Signed-off-by: Michal Lenc <michallenc@seznam.cz>
This commit is contained in:
Michal Lenc 2024-02-06 15:55:15 +01:00 committed by Alan Carvalho de Assis
parent 2849cd7c6d
commit 2f74233565
2 changed files with 73 additions and 4 deletions
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2
boards/arm/samv7/common/src/Make.defs
View File

@ -20,9 +20,7 @@
ifeq ($(CONFIG_ARCH_BOARD_COMMON),y)
ifeq ($(CONFIG_BOARDCTL_RESET),y)
CSRCS += sam_reset.c
endif
ifeq ($(CONFIG_BOARDCTL_BOOT_IMAGE),y)
CSRCS += sam_boot_image.c

75
boards/arm/samv7/common/src/sam_reset.c
View File

@ -27,12 +27,83 @@
#include <nuttx/arch.h>
#include <nuttx/board.h>
#ifdef CONFIG_BOARDCTL_RESET
#include "sam_systemreset.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_reset_cause
*
* Description:
* Get the cause of last board reset. This should call architecture
* specific logic to handle the register read.
*
* Input Parameters:
* cause - Pointer to boardioc_reset_cause_s structure to which the
* reason (and potentially subreason) is saved.
*
* Returned Value:
* This functions should always return succesfully with 0. We save
* BOARDIOC_RESETCAUSE_UNKOWN in cause structure if we are
* not able to get last reset cause from HW (which is unlikely).
*
****************************************************************************/
#ifdef CONFIG_BOARDCTL_RESET_CAUSE
int board_reset_cause(FAR struct boardioc_reset_cause_s *cause)
{
int rst_cause;
/* Get the reset cause from hardware */
rst_cause = sam_get_reset_cause();
switch (rst_cause)
{
case SAMV7_RESET_PWRUP:
/* Power up */
cause->cause = BOARDIOC_RESETCAUSE_SYS_CHIPPOR;
break;
case SAMV7_RESET_BACKUP:
/* Wake up from backup (low power) mode */
cause->cause = BOARDIOC_RESETCAUSE_LOWPOWER;
break;
case SAMV7_RESET_WDOG:
/* Watchdog error */
cause->cause = BOARDIOC_RESETCAUSE_CPU_RWDT;
break;
case SAMV7_RESET_SWRST:
/* SW reset */
cause->cause = BOARDIOC_RESETCAUSE_CPU_SOFT;
break;
case SAMV7_RESET_NRST:
/* Reset from user by pressing reset button */
cause->cause = BOARDIOC_RESETCAUSE_PIN;
break;
default:
/* Unknown cause returned from HW */
cause->cause = BOARDIOC_RESETCAUSE_UNKOWN;
break;
}
return 0;
}
#endif /* CONFIG_BOARDCTL_RESET_CAUSE */
/****************************************************************************
* Name: board_reset
*
@ -53,10 +124,10 @@
*
****************************************************************************/
#ifdef CONFIG_BOARDCTL_RESET
int board_reset(int status)
{
up_systemreset();
return 0;
}
#endif /* CONFIG_BOARDCTL_RESET */