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: Jaro Van Landschoot <jaro.vanlandschoot@basalte.be> Co-authored-by: Gerson Fernando Budke <nandojve@gmail.com>
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@ -4,6 +4,7 @@ zephyr_include_directories(.)
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zephyr_library_sources_ifndef(CONFIG_SOC_SERIES_SAM4L soc_pmc.c)
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zephyr_library_sources_ifndef(CONFIG_SOC_SERIES_SAM4L soc_gpio.c)
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zephyr_library_sources_ifndef(CONFIG_SOC_SERIES_SAM4L soc_supc.c)
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zephyr_library_sources_ifndef(CONFIG_SOC_SERIES_SAM4L soc_power.c)
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zephyr_library_sources_ifndef(CONFIG_SOC_SERIES_SAM4L soc_poweroff.c)
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zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_SAM4L soc_sam4l_pm.c)
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37
soc/arm/atmel_sam/common/soc_power.c
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37
soc/arm/atmel_sam/common/soc_power.c
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@ -0,0 +1,37 @@
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/*
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* Copyright (c) 2023 Basalte bv
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define SAM_DT_RSTC_DRIVER DT_INST(0, atmel_sam_rstc)
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#include <zephyr/kernel.h>
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#if defined(CONFIG_REBOOT)
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#include <zephyr/sys/reboot.h>
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#endif
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#if defined(CONFIG_REBOOT)
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#if DT_NODE_HAS_STATUS(SAM_DT_RSTC_DRIVER, okay)
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void sys_arch_reboot(int type)
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{
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Rstc *regs = (Rstc *)DT_REG_ADDR(SAM_DT_RSTC_DRIVER);
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switch (type) {
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case SYS_REBOOT_COLD:
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regs->RSTC_CR = RSTC_CR_KEY_PASSWD
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| RSTC_CR_PROCRST
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#if defined(CONFIG_SOC_SERIES_SAM3X) || defined(CONFIG_SOC_SERIES_SAM4S) || \
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defined(CONFIG_SOC_SERIES_SAM4E)
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| RSTC_CR_PERRST
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#endif /* CONFIG_SOC_SERIES_SAM3X || CONFIG_SOC_SERIES_SAM4S || CONFIG_SOC_SERIES_SAM4E */
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;
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break;
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default:
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break;
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}
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}
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#endif /* DT_NODE_HAS_STATUS */
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#endif /* CONFIG_REBOOT */
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