Commit be6cf5c2 authored by Jaro Van Landschoot's avatar Jaro Van Landschoot Committed by Fabio Baltieri
Browse files

soc: arm: atmel_sam: Sys_arch_reboot using RSTC 



The previous implementation of the sys_arch_reboot function
for the Atmel SAM series was using NVIC_SystemReset.
This caused a reboot time of around 20 seconds on a SAM4SA16CA,
which is now reduced by directly writing to the
reset controller control register (RSTC_CR).

Signed-off-by: default avatarJaro Van Landschoot <jaro.vanlandschoot@basalte.be>
Co-authored-by: default avatarGerson Fernando Budke <nandojve@gmail.com>
parent 6342aa3c

soc/arm/atmel_sam/common/CMakeLists.txt

+1 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ zephyr_include_directories(.) 
zephyr_library_sources_ifndef(CONFIG_SOC_SERIES_SAM4L soc_pmc.c)

zephyr_library_sources_ifndef(CONFIG_SOC_SERIES_SAM4L soc_gpio.c)

zephyr_library_sources_ifndef(CONFIG_SOC_SERIES_SAM4L soc_supc.c)

zephyr_library_sources_ifndef(CONFIG_SOC_SERIES_SAM4L soc_power.c)

zephyr_library_sources_ifndef(CONFIG_SOC_SERIES_SAM4L soc_poweroff.c)



zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_SAM4L soc_sam4l_pm.c)

soc/arm/atmel_sam/common/soc_power.c

0 → 100644
+37 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2023 Basalte bv

 *

 * SPDX-License-Identifier: Apache-2.0

 */



#define SAM_DT_RSTC_DRIVER DT_INST(0, atmel_sam_rstc)



#include <zephyr/kernel.h>

#if defined(CONFIG_REBOOT)

#include <zephyr/sys/reboot.h>

#endif



#if defined(CONFIG_REBOOT)

#if DT_NODE_HAS_STATUS(SAM_DT_RSTC_DRIVER, okay)



void sys_arch_reboot(int type)

{

	Rstc *regs = (Rstc *)DT_REG_ADDR(SAM_DT_RSTC_DRIVER);



	switch (type) {

	case SYS_REBOOT_COLD:

		regs->RSTC_CR = RSTC_CR_KEY_PASSWD

			      | RSTC_CR_PROCRST

#if defined(CONFIG_SOC_SERIES_SAM3X) || defined(CONFIG_SOC_SERIES_SAM4S) || \

	defined(CONFIG_SOC_SERIES_SAM4E)

			      | RSTC_CR_PERRST

#endif /* CONFIG_SOC_SERIES_SAM3X || CONFIG_SOC_SERIES_SAM4S || CONFIG_SOC_SERIES_SAM4E */

			      ;

		break;

	default:

		break;

	}

}



#endif /* DT_NODE_HAS_STATUS */

#endif /* CONFIG_REBOOT */

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