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boards: samples: drop support for Google Kukui EC

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Drop support for Google Kukui EC board which was used for
early Zephyr experiments but doesn't really exist anymore.

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
This commit is contained in:
Benjamin Cabé 2024-08-23 19:04:04 +02:00 • committed by Anas Nashif
commit cca08c3690
13 changed files with 1 additions and 267 deletions
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5
boards/google/kukui/Kconfig.google_kukui
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# Copyright 2019 The Chromium OS Authors
# SPDX-License-Identifier: Apache-2.0
config BOARD_GOOGLE_KUKUI
select SOC_STM32F098XX

1
boards/google/kukui/board.cmake
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# SPDX-License-Identifier: Apache-2.0

5
boards/google/kukui/board.yml
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board:
name: google_kukui
vendor: google
socs:
- name: stm32f098xx

88
boards/google/kukui/doc/index.rst
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.. _google_kukui_board:
Google Kukui EC
###############
Overview
********
Kukui is a reference board for Chromium OS-based devices Krane and
Kodama. These are known as the Lenovo Chromebook Duet and 10e Chromebook
Tablet, respectively.
Zephyr has support for the STM32-based embedded controller (EC) on-board.
Hardware
********
- STM32F098RCH6
- MT6370 battery charger
- BMM150 compass
- BMM160 gyroscope
- Connections to the MediaTek AP
Supported Features
==================
The following features are supported:
+-----------+------------+-------------------------------------+
| Interface | Controller | Driver/Component |
+===========+============+=====================================+
| NVIC | on-chip | nested vector interrupt controller |
+-----------+------------+-------------------------------------+
| UART | on-chip | serial port-polling; |
| | | serial port-interrupt |
+-----------+------------+-------------------------------------+
| PINMUX | on-chip | pinmux |
+-----------+------------+-------------------------------------+
| GPIO | on-chip | gpio |
+-----------+------------+-------------------------------------+
| CLOCK | on-chip | reset and clock control |
+-----------+------------+-------------------------------------+
| FLASH | on-chip | flash memory |
+-----------+------------+-------------------------------------+
| WATCHDOG | on-chip | independent watchdog |
+-----------+------------+-------------------------------------+
Other features (such as I2C) are not available in Zephyr.
The default configuration can be found in
:zephyr_file:`boards/google/kukui/google_kukui_defconfig`
Connections and IOs
===================
Each of the GPIO pins can be configured by software as output
(push-pull or open-drain), as input (with or without pull-up or
pull-down), or as peripheral alternate function.
Default Zephyr Peripheral Mapping:
----------------------------------
- UART_1 TX/RX : PA10/PA9
- I2C_1 SCL/SDA : PB8/PB9
- I2C_2 SCL/SDA : PA11/PA12
- Volume down : GPIOB pin 11
- Volume up : GPIOB pin 10
- Power : GPIOA pin 0
Programming and Debugging
*************************
Build application as usual for the ``google_kukui`` board, and flash
using Servo V2, μServo, or Servo V4 (CCD). See the
`Chromium EC Flashing Documentation`_ for more information.
Debugging
=========
Use SWD with a J-Link or ST-Link.
References
**********
.. target-notes::
.. _Chromium EC Flashing Documentation:
https://chromium.googlesource.com/chromiumos/platform/ec#Flashing-via-the-servo-debug-board

67
boards/google/kukui/google_kukui.dts
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/*
* Copyright (c) 2019 The Chromium OS Authors
*
* SPDX-License-Identifier: Apache-2.0
*/
/dts-v1/;
#include <st/f0/stm32f098Xc.dtsi>
#include <st/f0/stm32f098rchx-pinctrl.dtsi>
/ {
model = "Google Kukui EC";
compatible = "google,kukui-ec", "st,stm32f098";
chosen {
zephyr,console = &usart1;
zephyr,shell-uart = &usart1;
zephyr,sram = &sram0;
zephyr,flash = &flash0;
};
};
&clk_hsi {
status = "okay";
};
&rcc {
clocks = <&clk_hsi>;
clock-frequency = <DT_FREQ_M(8)>;
ahb-prescaler = <1>;
apb1-prescaler = <1>;
};
&usart1 {
pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>;
pinctrl-names = "default";
current-speed = <115200>;
status = "okay";
};
&flash0 {
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
/* Set 6Kb of storage at the end of the 256Kb of flash */
storage_partition: partition@3e800 {
label = "storage";
reg = <0x0003e800 DT_SIZE_K(6)>;
};
};
};
&i2c1 {
pinctrl-0 = <&i2c1_scl_pb8 &i2c1_sda_pb9>;
pinctrl-names = "default";
status = "okay";
clock-frequency = <I2C_BITRATE_FAST>;
};
&i2c2 {
pinctrl-0 = <&i2c2_scl_pa11 &i2c2_sda_pa12>;
pinctrl-names = "default";
status = "okay";
clock-frequency = <I2C_BITRATE_FAST>;
};

15
boards/google/kukui/google_kukui.yaml
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identifier: google_kukui
name: Google Kukui EC
type: mcu
arch: arm
toolchain:
- zephyr
- gnuarmemb
- xtools
ram: 32
flash: 256
testing:
ignore_tags:
- net
- bluetooth
vendor: google

18
boards/google/kukui/google_kukui_defconfig
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# SPDX-License-Identifier: Apache-2.0
# Serial Drivers
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
# Enable console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y
# GPIO Controller
CONFIG_GPIO=y
# Enable Clocks
CONFIG_CLOCK_CONTROL=y
# enable pin controller
CONFIG_PINCTRL=y

1
doc/releases/release-notes-4.0.rst
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@ -100,6 +100,7 @@ Boards & SoC Support
* :ref:`native_posix<native_posix>` has been deprecated in favour of * :ref:`native_posix<native_posix>` has been deprecated in favour of
:ref:`native_sim<native_sim>`. :ref:`native_sim<native_sim>`.
* Support for Google Kukui EC board (``google_kukui``) has been dropped.
* Added support for the following shields: * Added support for the following shields:

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samples/boards/google_kukui/CMakeLists.txt
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# SPDX-License-Identifier: Apache-2.0
cmake_minimum_required(VERSION 3.20.0)
find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
project(google_kukui)
FILE(GLOB app_sources src/*.c)
target_sources(app PRIVATE ${app_sources})

33
samples/boards/google_kukui/README.rst
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.. _google_kukui:
Kukui general features
######################
Overview
********
This provides access to :ref:`Kukui <google_kukui_board>` through a serial shell
so you can try out the supported features, including I2C, GPIO and flash access.
Building
********
The sample can be built as follows:
.. zephyr-app-commands::
:zephyr-app: samples/boards/google_kukui
:board: google_kukui
:goals: build
:compact:
Sample Output
=============
.. code-block:: console
Welcome to Google Kukui
uart:~$ (press tab)
clear flash gpio help history i2c resize shell
uart:~$ i2c read I2C_2 36
00000000: 82 00 00 ff 80 7f 00 ff 00 00 c1 0a c8 5b 0c 62 |........ .....[.b|

6
samples/boards/google_kukui/prj.conf
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# Enable all useful shell commands (i.e. those with driver support)
CONFIG_SHELL=y
CONFIG_SHELL_BACKENDS=y
CONFIG_SHELL_BACKEND_SERIAL=y
CONFIG_GPIO_SHELL=y
CONFIG_I2C_SHELL=y

6
samples/boards/google_kukui/sample.yaml
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sample:
name: Kukui general features
tests:
sample.board.google_kukui:
platform_allow: google_kukui
tags: ec

14
samples/boards/google_kukui/src/main.c
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/*
* Copyright 2020 Google LLC
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/kernel.h>
#include <zephyr/sys/printk.h>
int main(void)
{
printk("Welcome to Google Kukui\n");
return 0;
}