From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manivannan Sadhasivam Subject: [PATCH v2 01/10] dt-bindings: clock: Add syscon support to Actions Semi Owl SoCs Date: Wed, 1 Aug 2018 09:09:06 +0530 Message-ID: <20180801033915.15880-2-manivannan.sadhasivam@linaro.org> References: <20180801033915.15880-1-manivannan.sadhasivam@linaro.org> Return-path: In-Reply-To: <20180801033915.15880-1-manivannan.sadhasivam@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: p.zabel@pengutronix.de, mturquette@baylibre.com, sboyd@kernel.org, afaerber@suse.de, robh+dt@kernel.org, lee.jones@linaro.org, arnd@arndb.de Cc: linux-clk@vger.kernel.org, liuwei@actions-semi.com, mp-cs@actions-semi.com, 96boards@ucrobotics.com, devicetree@vger.kernel.org, daniel.thompson@linaro.org, amit.kucheria@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, hzhang@ucrobotics.com, bdong@ucrobotics.com, manivannanece23@gmail.com, thomas.liau@actions-semi.com, jeff.chen@actions-semi.com, pn@denx.de, edgar.righi@lsitec.org.br, sravanhome@gmail.com, Manivannan Sadhasivam List-Id: devicetree@vger.kernel.org Since the clock and reset management units are sharing the same memory map, document the clock bindings to support System Controller. Signed-off-by: Manivannan Sadhasivam --- .../bindings/clock/actions,owl-cmu.txt | 21 +++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/Documentation/devicetree/bindings/clock/actions,owl-cmu.txt b/Documentation/devicetree/bindings/clock/actions,owl-cmu.txt index d1e60d297387..649c95fc4582 100644 --- a/Documentation/devicetree/bindings/clock/actions,owl-cmu.txt +++ b/Documentation/devicetree/bindings/clock/actions,owl-cmu.txt @@ -9,8 +9,6 @@ Required Properties: - compatible: should be one of the following, "actions,s900-cmu" "actions,s700-cmu" -- reg: physical base address of the controller and length of memory mapped - region. - clocks: Reference to the parent clocks ("hosc", "losc") - #clock-cells: should be 1. @@ -21,6 +19,13 @@ All available clocks are defined as preprocessor macros in corresponding dt-bindings/clock/actions,s900-cmu.h or actions,s700-cmu.h header and can be used in device tree sources. +The CMU registers are part of the system-controller block on Owl SoCs. + +Parent node should have the following properties : +- compatible: "syscon", "simple-mfd" +- reg: physical base address of the controller and length of memory mapped + region. + External clocks: The hosc clock used as input for the plls is generated outside the SoC. It is @@ -31,11 +36,15 @@ Actions Semi S900 CMU also requires one more clock: Example: Clock Management Unit node: - cmu: clock-controller@e0160000 { - compatible = "actions,s900-cmu"; + sysctrl: system-controller@e0160000 { + compatible = "syscon", "simple-mfd"; reg = <0x0 0xe0160000 0x0 0x1000>; - clocks = <&hosc>, <&losc>; - #clock-cells = <1>; + + cmu: clock-controller { + compatible = "actions,s900-cmu"; + clocks = <&hosc>, <&losc>; + #clock-cells = <1>; + }; }; Example: UART controller node that consumes clock generated by the clock -- 2.17.1