From 3b3025625fa41b79f4e729e9365e4f8564de7cdf Mon Sep 17 00:00:00 2001 From: Neil Armstrong Date: Tue, 1 Aug 2017 13:56:56 +0200 Subject: dt-bindings: clock: amlogic, gxbb-aoclkc: Update bindings On the first revision of the bindings, only the gates + resets were known in the AO Clock HW, but more registers used to configures AO clock are known to be spread among the AO register space. This patch adds a parent node for the entire system control zone for the AO domain then moves the clock controller as a subnode of the system control node. Signed-off-by: Neil Armstrong --- .../bindings/clock/amlogic,gxbb-aoclkc.txt | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/clock/amlogic,gxbb-aoclkc.txt b/Documentation/devicetree/bindings/clock/amlogic,gxbb-aoclkc.txt index a55d31b48d6e..64884ede4938 100644 --- a/Documentation/devicetree/bindings/clock/amlogic,gxbb-aoclkc.txt +++ b/Documentation/devicetree/bindings/clock/amlogic,gxbb-aoclkc.txt @@ -5,9 +5,11 @@ controllers within the Always-On part of the SoC. Required Properties: -- compatible: should be "amlogic,gxbb-aoclkc" -- reg: physical base address of the clock controller and length of memory - mapped region. +- compatible: value should be different for each SoC family as : + - GXBB (S905) : "amlogic,meson-gxbb-aoclkc" + - GXL (S905X, S905D) : "amlogic,meson-gxl-aoclkc" + - GXM (S912) : "amlogic,meson-gxm-aoclkc" + followed by the common "amlogic,meson-gx-aoclkc" - #clock-cells: should be 1. @@ -23,14 +25,22 @@ to specify the reset which they consume. All available resets are defined as preprocessor macros in the dt-bindings/reset/gxbb-aoclkc.h header and can be used in device tree sources. +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 Clock controller node: - clkc_AO: clock-controller@040 { - compatible = "amlogic,gxbb-aoclkc"; - reg = <0x0 0x040 0x0 0x4>; +ao_sysctrl: sys-ctrl@0 { + compatible = "amlogic,meson-gx-ao-sysctrl", "syscon", "simple-mfd"; + reg = <0x0 0x0 0x0 0x100>; + + clkc_AO: clock-controller { + compatible = "amlogic,meson-gxbb-aoclkc", "amlogic,meson-gx-aoclkc"; #clock-cells = <1>; #reset-cells = <1>; }; +}; Example: UART controller node that consumes the clock and reset generated by the clock controller: -- cgit