64 lines
1.9 KiB
Plaintext
64 lines
1.9 KiB
Plaintext
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.yaml
|
|
|
|
Device Tree Bindings:
|
|
---------------------
|
|
|
|
Required properties:
|
|
- compatible: should be one of the following :
|
|
- "amlogic,meson-gx-pwrc-vpu" for the Meson GX SoCs
|
|
- "amlogic,meson-g12a-pwrc-vpu" for the Meson G12A 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";
|
|
};
|
|
};
|
|
|
|
|