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tests: drivers: retained_mem: enable api test for esp32 platforms
Enables retained_mem api test using RTC RAM for the following platforms: - esp32_devkitc/esp32/procpu - esp32c3_devkitm - esp32c6_devkitc/esp32c6/hpcore - esp32h2_devkitm - esp32s2_saola - esp32s3_devkitm/esp32s3/procpu Signed-off-by: Marcio Ribeiro <[email protected]>
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‎tests/drivers/retained_mem/api/boards/esp32_devkitc_procpu.overlay‎

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/*
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* Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/ {
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memory@50001f00 {
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compatible = "zephyr,memory-region", "mmio-sram";
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reg = <0x50001f00 0x100>;
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zephyr,memory-region = "RTC_SLOW_RAM_RETAINED_MEM";
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status = "okay";
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retainedmem0: retainedmem {
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compatible = "zephyr,retained-ram";
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status = "okay";
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};
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};
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aliases {
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retainedmemtestdevice = &retainedmem0;
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};
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};
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&rtc_slow_ram {
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/* Shrink rtc_slow_ram size to avoid overlap with retained memory region:
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* 8KB - 256 = 0x1f00
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*/
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reg = <0x50000000 0x1f00>;
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};

‎tests/drivers/retained_mem/api/boards/esp32c3_devkitm.overlay‎

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/*
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* Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/ {
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memory@50001f00 {
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compatible = "zephyr,memory-region", "mmio-sram";
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reg = <0x50001f00 0x100>;
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zephyr,memory-region = "RTC_FAST_RAM_RETAINED_MEM";
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status = "okay";
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retainedmem0: retainedmem {
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compatible = "zephyr,retained-ram";
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status = "okay";
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};
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};
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aliases {
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retainedmemtestdevice = &retainedmem0;
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};
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};
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&rtc_fast_ram {
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/* Shrink rtc_fast_ram size to avoid overlap with retained memory region:
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* 8KB - 256 = 0x1f00
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*/
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reg = <0x50000000 0x1f00>;
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};

‎tests/drivers/retained_mem/api/boards/esp32c6_devkitc_hpcore.overlay‎

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/*
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* Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/ {
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memory@50003f00 {
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compatible = "zephyr,memory-region", "mmio-sram";
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reg = <0x50003f00 0x100>;
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zephyr,memory-region = "RTC_FAST_RAM_RETAINED_MEM";
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status = "okay";
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retainedmem0: retainedmem {
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compatible = "zephyr,retained-ram";
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status = "okay";
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};
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};
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aliases {
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retainedmemtestdevice = &retainedmem0;
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};
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};
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&sramlp {
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/* Shrink sramlp size to avoid overlap with retained memory region:
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* 16KB - 256 = 0x3f00
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*/
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reg = <0x50000000 0x3f00>;
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};
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&shmlp {
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/* Shift shmlp to keep it inside sramlp memory region:
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* 0x50003fe0 - 256 = 0x50003ee0
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*/
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reg = <0x50003ee0 0x10>;
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};
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&mbox0 {
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/*
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* 0x50003ff0 - 256 = 0x50003ef0
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*/
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reg = <0x50003ef0 0x8>;
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};

‎tests/drivers/retained_mem/api/boards/esp32h2_devkitm.overlay‎

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/*
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* Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/ {
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memory@50000f00 {
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compatible = "zephyr,memory-region", "mmio-sram";
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reg = <0x50000f00 0x100>;
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zephyr,memory-region = "RTC_FAST_RAM_RETAINED_MEM";
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status = "okay";
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retainedmem0: retainedmem {
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compatible = "zephyr,retained-ram";
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status = "okay";
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};
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};
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aliases {
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retainedmemtestdevice = &retainedmem0;
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};
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};
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&sramlp {
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/* Shrink sramlp size to avoid overlap with retained memory region:
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* 4KB - 256 = 0xf00
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*/
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reg = <0x50000000 0xf00>;
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};

‎tests/drivers/retained_mem/api/boards/esp32s2_saola.overlay‎

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/*
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* Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/ {
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memory@50001f00 {
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compatible = "zephyr,memory-region", "mmio-sram";
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reg = <0x50001f00 0x100>;
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zephyr,memory-region = "RTC_SLOW_RAM_RETAINED_MEM";
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status = "okay";
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retainedmem0: retainedmem {
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compatible = "zephyr,retained-ram";
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status = "okay";
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};
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};
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aliases {
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retainedmemtestdevice = &retainedmem0;
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};
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};
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&rtc_slow_ram {
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/* Shrink rtc_slow_ram size to avoid overlap with retained memory region:
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* 8KB - 256 = 0x1f00
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*/
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reg = <0x50000000 0x1f00>;
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};

‎tests/drivers/retained_mem/api/boards/esp32s3_devkitm_procpu.overlay‎

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/*
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* Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/ {
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memory@50001f00 {
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compatible = "zephyr,memory-region", "mmio-sram";
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reg = <0x50001f00 0x100>;
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zephyr,memory-region = "RTC_SLOW_RAM_RETAINED_MEM";
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status = "okay";
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retainedmem0: retainedmem {
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compatible = "zephyr,retained-ram";
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status = "okay";
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};
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};
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aliases {
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retainedmemtestdevice = &retainedmem0;
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};
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};
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&rtc_slow_ram {
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/* Shrink rtc_slow_ram size to avoid overlap with retained memory region:
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* 8KB - 256 = 0x1f00
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*/
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reg = <0x50000000 0x1f00>;
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};

‎tests/drivers/retained_mem/api/testcase.yaml‎

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- retained_mem
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drivers.retained_mem.api.ram:
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platform_allow:
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- esp32_devkitc/esp32/procpu
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- esp32c3_devkitm
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- esp32c6_devkitc/esp32c6/hpcore
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- esp32h2_devkitm
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- esp32s2_saola
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- esp32s3_devkitm/esp32s3/procpu
915
- qemu_cortex_m3
1016
- nrf5340dk/nrf5340/cpuapp
1117
- nrf54h20dk/nrf54h20/cpuapp

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