From 8fca9e95243128961357577ba394ec1d4bd8c92c Mon Sep 17 00:00:00 2001 From: Neil Armstrong Date: Sat, 28 Oct 2017 18:40:17 +0200 Subject: [PATCH] dt-bindings: power: add amlogic meson power domain bindings Acked-by: Rob Herring Signed-off-by: Neil Armstrong [khilman: minor whitespace fixups] Signed-off-by: Kevin Hilman --- .../bindings/power/amlogic,meson-gx-pwrc.txt | 61 +++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/amlogic,meson-gx-pwrc.txt diff --git a/Documentation/devicetree/bindings/power/amlogic,meson-gx-pwrc.txt b/Documentation/devicetree/bindings/power/amlogic,meson-gx-pwrc.txt new file mode 100644 index 000000000000..1cd050b4054c --- /dev/null +++ b/Documentation/devicetree/bindings/power/amlogic,meson-gx-pwrc.txt @@ -0,0 +1,61 @@ +Amlogic Meson Power Controller +============================== + +The Amlogic Meson SoCs embeds an internal Power domain controller. + +VPU Power Domain +---------------- + +The Video Processing Unit power domain is controlled by this power controller, +but the domain requires some external resources to meet the correct power +sequences. +The bindings must respect the power domain bindings as described in the file +power_domain.txt + +Device Tree Bindings: +--------------------- + +Required properties: +- compatible: should be "amlogic,meson-gx-pwrc-vpu" for the Meson GX SoCs +- #power-domain-cells: should be 0 +- amlogic,hhi-sysctrl: phandle to the HHI sysctrl node +- resets: phandles to the reset lines needed for this power demain sequence + as described in ../reset/reset.txt +- clocks: from common clock binding: handle to VPU and VAPB clocks +- clock-names: from common clock binding: must contain "vpu", "vapb" + corresponding to entry in the clocks property. + +Parent node should have the following properties : +- compatible: "amlogic,meson-gx-ao-sysctrl", "syscon", "simple-mfd" +- reg: base address and size of the AO system control register space. + +Example: +------- + +ao_sysctrl: sys-ctrl@0 { + compatible = "amlogic,meson-gx-ao-sysctrl", "syscon", "simple-mfd"; + reg = <0x0 0x0 0x0 0x100>; + + pwrc_vpu: power-controller-vpu { + compatible = "amlogic,meson-gx-pwrc-vpu"; + #power-domain-cells = <0>; + amlogic,hhi-sysctrl = <&sysctrl>; + resets = <&reset RESET_VIU>, + <&reset RESET_VENC>, + <&reset RESET_VCBUS>, + <&reset RESET_BT656>, + <&reset RESET_DVIN_RESET>, + <&reset RESET_RDMA>, + <&reset RESET_VENCI>, + <&reset RESET_VENCP>, + <&reset RESET_VDAC>, + <&reset RESET_VDI6>, + <&reset RESET_VENCL>, + <&reset RESET_VID_LOCK>; + clocks = <&clkc CLKID_VPU>, + <&clkc CLKID_VAPB>; + clock-names = "vpu", "vapb"; + }; +}; + +