Re: [PATCH v4 2/3] reboot-mode: read the boot mode from GPIOs status

Simon Glass
2021-06-26T18:31:27Z

On Thu, 10 Jun 2021 at 07:57, Nandor Han <nandor.han@vaisala.com> wrote:
>
> A use case for controlling the boot mode is when the user wants
> to control the device boot by pushing a button without needing to
> go in user-space.
>
> Add a new backed for reboot mode where GPIOs are used to control the
> reboot-mode. The driver is able to scan a predefined list of GPIOs
> and return the magic value. Having the modes associated with
> the magic value generated based on the GPIO values, allows the
> reboot mode uclass to select the proper mode.
>
> Signed-off-by: Nandor Han <nandor.han@vaisala.com>
> ---
> arch/sandbox/dts/test.dts | 8 ++
> configs/sandbox_defconfig | 2 +
> .../reboot-mode/reboot-mode-gpio.txt | 20 +++
> drivers/reboot-mode/Kconfig | 9 ++
> drivers/reboot-mode/Makefile | 1 +
> drivers/reboot-mode/reboot-mode-gpio.c | 128 ++++++++++++++++++
> include/reboot-mode/reboot-mode-gpio.h | 32 +++++
> test/dm/Makefile | 1 +
> test/dm/reboot-mode.c | 42 ++++++
> 9 files changed, 243 insertions(+)
> create mode 100644 doc/device-tree-bindings/reboot-mode/reboot-mode-gpio.txt
> create mode 100644 drivers/reboot-mode/reboot-mode-gpio.c
> create mode 100644 include/reboot-mode/reboot-mode-gpio.h
> create mode 100644 test/dm/reboot-mode.c

Reviewed-by: Simon Glass <sjg@chromium.org>