From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- .../devicetree/bindings/clock/hi6220-clock.txt | 52 ++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/hi6220-clock.txt (limited to 'Documentation/devicetree/bindings/clock/hi6220-clock.txt') diff --git a/Documentation/devicetree/bindings/clock/hi6220-clock.txt b/Documentation/devicetree/bindings/clock/hi6220-clock.txt new file mode 100644 index 000000000..17ac4a3dd --- /dev/null +++ b/Documentation/devicetree/bindings/clock/hi6220-clock.txt @@ -0,0 +1,52 @@ +* Hisilicon Hi6220 Clock Controller + +Clock control registers reside in different Hi6220 system controllers, +please refer the following document to know more about the binding rules +for these system controllers: + +Documentation/devicetree/bindings/arm/hisilicon/hisilicon.yaml + +Required Properties: + +- compatible: the compatible should be one of the following strings to + indicate the clock controller functionality. + + - "hisilicon,hi6220-acpu-sctrl" + - "hisilicon,hi6220-aoctrl" + - "hisilicon,hi6220-sysctrl" + - "hisilicon,hi6220-mediactrl" + - "hisilicon,hi6220-pmctrl" + - "hisilicon,hi6220-stub-clk" + +- reg: physical base address of the controller and length of memory mapped + region. + +- #clock-cells: should be 1. + +Optional Properties: + +- hisilicon,hi6220-clk-sram: phandle to the syscon managing the SoC internal sram; + the driver need use the sram to pass parameters for frequency change. + +- mboxes: use the label reference for the mailbox as the first parameter, the + second parameter is the channel number. + +Example 1: + sys_ctrl: sys_ctrl@f7030000 { + compatible = "hisilicon,hi6220-sysctrl", "syscon"; + reg = <0x0 0xf7030000 0x0 0x2000>; + #clock-cells = <1>; + }; + +Example 2: + stub_clock: stub_clock { + compatible = "hisilicon,hi6220-stub-clk"; + hisilicon,hi6220-clk-sram = <&sram>; + #clock-cells = <1>; + mboxes = <&mailbox 1>; + }; + +Each clock is assigned an identifier and client nodes use this identifier +to specify the clock which they consume. + +All these identifier could be found in . -- cgit v1.2.3