On Tue, Feb 02, 2016 at 05:59:11PM +0800, Andy Yan wrote:
> add device tree bindings document for reboot-mode driver
>
> Signed-off-by: Andy Yan <andy.yan@xxxxxxxxxxxxxx>
>
> ---
>
> Changes in v3:
> - descirbe all reboot mode as properity instead of subnode
>
> Changes in v2: None
> Changes in v1: None
>
> .../bindings/power/reset/reboot-mode.txt | 26 ++++++++++++++++
> .../bindings/power/reset/syscon-reboot-mode.txt | 36 ++++++++++++++++++++++
> 2 files changed, 62 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/power/reset/reboot-mode.txt
> create mode 100644 Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt
>
> diff --git a/Documentation/devicetree/bindings/power/reset/reboot-mode.txt b/Documentation/devicetree/bindings/power/reset/reboot-mode.txt
> new file mode 100644
> index 0000000..517080f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/reset/reboot-mode.txt
> @@ -0,0 +1,26 @@
> +Generic reboot mode core map driver
> +
> +This driver get reboot mode arguments and call the write
> +interface to stores the magic value in special register
> +or ram . Then the bootloader can read it and take different
> +action according the argument stored.
> +
> +All mode properties are vendor specific, it is a indication to tell
The values should be vendor specific. The property names should not. We
can allow vendor specific ones, but we need to have a common set.
> +the bootloder what to do when the system reboot, and should be named
> +as mode-xxx = <magic> (xxx is mode name).
> +
> +- mode-normal: Normal reboot mode, system reboot with command "reboot".
> +- mode-recovery: Android Recovery mode, it is a mode to format the device or update a new image.
> +- mode-fastboot: Android fastboot mode, it's a mode to re-flash partitions on the device.
> +- mode-loader: A bootloader mode, it's a mode used to download image on Rockchip platform,
> + usually used in development.
> +- mode-maskrom: It's a mode to download bootloader on Rockchip platform.
> +
> +Example:
> + reboot-mode {
> + mode-normal = <BOOT_NORMAL>;
> + mode-recovery = <BOOT_RECOVERY>;
> + mode-fastboot = <BOOT_FASTBOOT>;
I tend to agree with John on calling this mode-bootloader.
OTOH, fastboot is more specific about what the mode is. The name in DT
and the userspace name don't necessarily have to be the same.
> + mode-loader = <BOOT_LOADER>;
This one needs a better name. Maybe it should be 'rockchip,mode-loader'
as it is vendor specific. Either way, loader is vague. Perhaps
rockchip,mode-bl-download?
> + mode-maskrom = <BOOT_MASKROM>;
I think this should be "mode-rom-download".
> + }
> diff --git a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt
> new file mode 100644
> index 0000000..923c82b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt
> @@ -0,0 +1,36 @@
> +SYSCON reboot mode driver
> +
> +This driver get reboot mode magic value form reboot-mode driver
> +and stores it in a SYSCON mapped register. Then the bootloader
> +can read it and take different action according to the magic
> +value stored.
> +
> +This DT node should be represented as a sub-node of a "syscon", "simple-mfd"
> +node.
Whether or not it is a simple-mfd or not depends on the syscon node.
> +
> +Required properties:
> +- compatible: should be "syscon-reboot-mode"
> +- offset: offset in the register map for the storage register (in bytes)
> +
> +Optional properity:
> +- mask: the mask bits of the mode magic value, default set to 0xffffffff if missing.
> +
> +The rest of the properties should follow the generic reboot-mode discription
> +found in reboot-mode.txt
> +
> +Example:
> + pmu: pmu@20004000 {
> + compatible = "rockchip,rk3066-pmu", "syscon", "simple-mfd";
> + reg = <0x20004000 0x100>;
> +
> + reboot-mode {
> + compatible = "syscon-reboot-mode";
> + offset = <0x40>;
> + mode-normal = <BOOT_NORMAL>;
> + mode-recovery = <BOOT_RECOVERY>;
> + mode-fastboot = <BOOT_FASTBOOT>;
> + mode-loader = <BOOT_LOADER>;
> + mode-maskrom = <BOOT_MASKROM>;
> +
> + };
> + };
> --
> 1.9.1
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe devicetree" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
