[PATCH v3 1/4] dt-bindings: power: reset: add document for reboot-mode driver
From: Andy Yan <andy.yan@rock-chips.com>
Date: 2016-02-02 10:01:19
Also in:
linux-arm-kernel, linux-pm, linux-rockchip, lkml
Subsystem:
open firmware and flattened device tree bindings, system reset/shutdown drivers, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Sebastian Reichel, Linus Torvalds
add device tree bindings document for reboot-mode driver Signed-off-by: Andy Yan <andy.yan@rock-chips.com> --- 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 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>; + mode-loader = <BOOT_LOADER>; + mode-maskrom = <BOOT_MASKROM>; + }
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. + +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>; + + }; + };
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1.9.1