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feat(boards): Add ZMK specific tweaks for upstream rp2040-zero board #3175

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feat(boards): Add ZMK specific tweaks for upstream rp2040-zero board #3175

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5 changes: 5 additions & 0 deletions app/boards/waveshare/rp2040_zero/board.yml
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board:
extend: rp2040_zero
variants:
- name: zmk
qualifier: rp2040
8 changes: 8 additions & 0 deletions app/boards/waveshare/rp2040_zero/rp2040_zero.zmk.yml
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file_format: "1"
id: rp2040_zero//zmk
name: Waveshare RP2040-Zero
type: board
arch: arm
outputs:
- usb
url: https://www.waveshare.com/wiki/RP2040-Zero
23 changes: 23 additions & 0 deletions app/boards/waveshare/rp2040_zero/rp2040_zero_rp2040_zmk.dts
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/*
* Copyright (c) 2026 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/

#include <../boards/waveshare/rp2040_zero/rp2040_zero.dts>
#include <arm/raspberrypi/rp2040-boot-mode-retention.dtsi>

&uart0 { status = "disabled"; };

&code_partition {
reg = <0x100 (DT_SIZE_M(2) - 0x100 - DT_SIZE_K(512))>;
};

&flash0 {
partitions {
storage_partition: partition@180000 {
reg = <0x180000 DT_SIZE_K(512)>;
read-only;
};
};
};
27 changes: 27 additions & 0 deletions app/boards/waveshare/rp2040_zero/rp2040_zero_rp2040_zmk_defconfig
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CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=125000000

# Core deps
CONFIG_RESET=y
CONFIG_CLOCK_CONTROL=y
CONFIG_GPIO=y

# Build Output
CONFIG_USE_DT_CODE_PARTITION=y
CONFIG_BUILD_OUTPUT_UF2=y
CONFIG_BUILD_OUTPUT_HEX=y

# USB HID
CONFIG_ZMK_USB=y

# Settings Support
CONFIG_MPU_ALLOW_FLASH_WRITE=y
CONFIG_NVS=y
CONFIG_SETTINGS_NVS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y

# Bootloader Support
CONFIG_RETAINED_MEM=y
CONFIG_RETENTION=y
CONFIG_RETENTION_BOOT_MODE=y