diff --git a/drivers/hwinfo/CMakeLists.txt b/drivers/hwinfo/CMakeLists.txt index f2626ee455f..f7ec8d50b27 100644 --- a/drivers/hwinfo/CMakeLists.txt +++ b/drivers/hwinfo/CMakeLists.txt @@ -16,6 +16,7 @@ zephyr_library_sources_ifdef(CONFIG_HWINFO_MCUX_SRC hwinfo_mcux_src.c) zephyr_library_sources_ifdef(CONFIG_HWINFO_MCUX_SYSCON hwinfo_mcux_syscon.c) zephyr_library_sources_ifdef(CONFIG_HWINFO_NRF hwinfo_nrf.c) zephyr_library_sources_ifdef(CONFIG_HWINFO_PSOC6 hwinfo_psoc6.c) +zephyr_library_sources_ifdef(CONFIG_HWINFO_SAM_RSTC hwinfo_sam_rstc.c) zephyr_library_sources_ifdef(CONFIG_HWINFO_SAM hwinfo_sam.c) zephyr_library_sources_ifdef(CONFIG_HWINFO_SAM0 hwinfo_sam0.c) zephyr_library_sources_ifdef(CONFIG_HWINFO_SAM4L hwinfo_sam4l.c) diff --git a/drivers/hwinfo/Kconfig b/drivers/hwinfo/Kconfig index 8595ac82305..c4074981214 100644 --- a/drivers/hwinfo/Kconfig +++ b/drivers/hwinfo/Kconfig @@ -70,12 +70,20 @@ config HWINFO_IMXRT help Enable NXP i.mx RT hwinfo driver. +config HWINFO_SAM_RSTC + bool "Atmel SAM reset cause" + default y + depends on SOC_SERIES_SAM4S || SOC_SERIES_SAME70 || \ + SOC_SERIES_SAMV71 + help + Enable Atmel SAM reset cause hwinfo driver. + config HWINFO_SAM bool "Atmel SAM device ID" default y depends on SOC_FAMILY_SAM && !SOC_SERIES_SAM4L help - Enable Atmel SAM hwinfo driver. + Enable Atmel SAM device ID hwinfo driver. config HWINFO_SAM4L bool "Atmel SAM4L device ID" diff --git a/drivers/hwinfo/hwinfo_sam_rstc.c b/drivers/hwinfo/hwinfo_sam_rstc.c new file mode 100644 index 00000000000..57adaf5292d --- /dev/null +++ b/drivers/hwinfo/hwinfo_sam_rstc.c @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2022 Basalte bv + * + * SPDX-License-Identifier: Apache-2.0 + */ + +#define DT_DRV_COMPAT atmel_sam_rstc + +#include +#include +#include +#include + +BUILD_ASSERT(DT_NUM_INST_STATUS_OKAY(DT_DRV_COMPAT) == 1, + "No atmel,sam-rstc compatible device found"); + +int z_impl_hwinfo_get_reset_cause(uint32_t *cause) +{ + /* Get reason from Status Register */ + uint32_t reason = ((Rstc *)DT_INST_REG_ADDR(0))->RSTC_SR & RSTC_SR_RSTTYP_Msk; + + switch (reason) { + case RSTC_SR_RSTTYP_GENERAL_RST: + *cause = RESET_POR; + break; + case RSTC_SR_RSTTYP_BACKUP_RST: + *cause = RESET_LOW_POWER_WAKE; + break; + case RSTC_SR_RSTTYP_WDT_RST: + *cause = RESET_WATCHDOG; + break; + case RSTC_SR_RSTTYP_SOFT_RST: + *cause = RESET_SOFTWARE; + break; + case RSTC_SR_RSTTYP_USER_RST: + *cause = RESET_USER; + break; + default: + break; + } + + return 0; +} + +int z_impl_hwinfo_get_supported_reset_cause(uint32_t *supported) +{ + *supported = RESET_POR + | RESET_LOW_POWER_WAKE + | RESET_WATCHDOG + | RESET_SOFTWARE + | RESET_USER; + + return 0; +} + +static int hwinfo_rstc_init(const struct device *dev) +{ + Rstc *regs = (Rstc *)DT_INST_REG_ADDR(0); + uint32_t mode; + + ARG_UNUSED(dev); + + /* Enable RSTC in PMC */ + soc_pmc_peripheral_enable(DT_INST_PROP(0, peripheral_id)); + + /* Get current Mode Register value */ + mode = regs->RSTC_MR; + + /* Enable/disable user reset on NRST */ +#if DT_INST_PROP(0, user_nrst) + mode &= ~RSTC_MR_KEY_Msk; + mode |= (RSTC_MR_URSTEN | RSTC_MR_KEY_PASSWD); +#else + mode &= ~(RSTC_MR_URSTEN | RSTC_MR_KEY_Msk); + mode |= RSTC_MR_KEY_PASSWD; +#endif + + /* Set Mode Register value */ + regs->RSTC_MR = mode; + + return 0; +} + +SYS_INIT(hwinfo_rstc_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE); diff --git a/dts/arm/atmel/sam4s.dtsi b/dts/arm/atmel/sam4s.dtsi index 43a64fe494b..b25682d8271 100644 --- a/dts/arm/atmel/sam4s.dtsi +++ b/dts/arm/atmel/sam4s.dtsi @@ -210,6 +210,13 @@ label = "TC1"; pinctrl-0 = <>; }; + + rstc: rstc@400e1400 { + compatible = "atmel,sam-rstc"; + reg = <0x400e1400 0x10>; + peripheral-id = <1>; + label = "RSTC"; + }; }; }; diff --git a/dts/arm/atmel/same70.dtsi b/dts/arm/atmel/same70.dtsi index 96149a432df..8b113d7aa87 100644 --- a/dts/arm/atmel/same70.dtsi +++ b/dts/arm/atmel/same70.dtsi @@ -492,6 +492,13 @@ label = "CAN_1"; }; }; + + rstc: rstc@400e1800 { + compatible = "atmel,sam-rstc"; + reg = <0x400e1800 0x10>; + peripheral-id = <1>; + label = "RSTC"; + }; }; }; diff --git a/dts/bindings/hwinfo/atmel,sam-rstc.yaml b/dts/bindings/hwinfo/atmel,sam-rstc.yaml new file mode 100644 index 00000000000..e53182bc176 --- /dev/null +++ b/dts/bindings/hwinfo/atmel,sam-rstc.yaml @@ -0,0 +1,21 @@ +# Copyright (c) 2022 Basalte bv +# SPDX-License-Identifier: Apache-2.0 + +description: ATMEL SAM Reset controller + +compatible: "atmel,sam-rstc" + +include: base.yaml + +properties: + reg: + required: true + + peripheral-id: + type: int + description: peripheral ID + required: true + + user-nrst: + type: boolean + description: Allow user reset on external NRST assert.