提交 859e4280 编写于 作者: S Sascha Hauer 提交者: Matthias Brugger

dt-bindings: soc: Add documentation for the MediaTek SCPSYS unit

This adds documentation for the MediaTek SCPSYS unit found in MT8173 SoCs.
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: NDaniel Kurtz <djkurtz@chromium.org>
Signed-off-by: NMatthias Brugger <matthias.bgg@gmail.com>
上级 16a624a9
MediaTek SCPSYS
===============
The System Control Processor System (SCPSYS) has several power management
related tasks in the system. The tasks include thermal measurement, dynamic
voltage frequency scaling (DVFS), interrupt filter and lowlevel sleep control.
The System Power Manager (SPM) inside the SCPSYS is for the MTCMOS power
domain control.
The driver implements the Generic PM domain bindings described in
power/power_domain.txt. It provides the power domains defined in
include/dt-bindings/power/mt8173-power.h.
Required properties:
- compatible: Must be "mediatek,mt8173-scpsys"
- #power-domain-cells: Must be 1
- reg: Address range of the SCPSYS unit
- infracfg: must contain a phandle to the infracfg controller
- clock, clock-names: clocks according to the common clock binding.
The clocks needed "mm" and "mfg". These are the
clocks which hardware needs to be enabled before
enabling certain power domains.
Example:
scpsys: scpsys@10006000 {
#power-domain-cells = <1>;
compatible = "mediatek,mt8173-scpsys";
reg = <0 0x10006000 0 0x1000>;
infracfg = <&infracfg>;
clocks = <&clk26m>,
<&topckgen CLK_TOP_MM_SEL>;
clock-names = "mfg", "mm";
};
Example consumer:
afe: mt8173-afe-pcm@11220000 {
compatible = "mediatek,mt8173-afe-pcm";
power-domains = <&scpsys MT8173_POWER_DOMAIN_AUDIO>;
};
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