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| author | Andy Yan <andy.yan@rock-chips.com> | 2016-07-06 21:22:45 +0800 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2016-07-06 17:15:39 +0200 |
| commit | 376e27e485cbe9f903369a002d07d5a01225d1d3 (patch) | |
| tree | a83820e81dba8decaae8254f1993acf504b54832 | |
| parent | e380538529e83c5d3fd27e8cbfcc1f9799cb6bbb (diff) | |
| download | linux-376e27e485cbe9f903369a002d07d5a01225d1d3.tar.gz linux-376e27e485cbe9f903369a002d07d5a01225d1d3.tar.bz2 linux-376e27e485cbe9f903369a002d07d5a01225d1d3.zip | |
dt-bindings: power: reset: add document for reboot-mode driver
Add device tree bindings document for reboot-mode driver.
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/power/reset/reboot-mode.txt | 25 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt | 35 |
2 files changed, 60 insertions, 0 deletions
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 000000000000..de34f27d509e --- /dev/null +++ b/Documentation/devicetree/bindings/power/reset/reboot-mode.txt @@ -0,0 +1,25 @@ +Generic reboot mode core map driver + +This driver get reboot mode arguments and call the write +interface to store the magic value in special register +or ram. Then the bootloader can read it and take different +action according to the argument stored. + +All mode properties are vendor specific, it is a indication to tell +the bootloader what to do when the system reboots, and should be named +as mode-xxx = <magic> (xxx is mode name, magic should be a none-zero value). + +For example modes common on Android platform: +- 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-bootloader: Android fastboot mode, it's a mode to re-flash partitions on the Android based device. +- mode-loader: A bootloader mode, it's a mode used to download image on Rockchip platform, + usually used in development. + +Example: + reboot-mode { + mode-normal = <BOOT_NORMAL>; + mode-recovery = <BOOT_RECOVERY>; + mode-bootloader = <BOOT_FASTBOOT>; + mode-loader = <BOOT_BL_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 000000000000..f7ce1d8af04a --- /dev/null +++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt @@ -0,0 +1,35 @@ +SYSCON reboot mode driver + +This driver gets 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. + +Required properties: +- compatible: should be "syscon-reboot-mode" +- offset: offset in the register map for the storage register (in bytes) + +Optional property: +- mask: bits mask of the bits in the register to store the reboot mode magic value, + default set to 0xffffffff if missing. + +The rest of the properties should follow the generic reboot-mode description +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-bootloader = <BOOT_FASTBOOT>; + mode-loader = <BOOT_BL_DOWNLOAD>; + }; + }; |