From mboxrd@z Thu Jan 1 00:00:00 1970 From: Songjun Wu Subject: [PATCH v2 03/18] dt-bindings: clk: Add documentation of grx500 clock controller Date: Fri, 3 Aug 2018 11:02:22 +0800 Message-ID: <20180803030237.3366-4-songjun.wu@linux.intel.com> References: <20180803030237.3366-1-songjun.wu@linux.intel.com> Return-path: In-Reply-To: <20180803030237.3366-1-songjun.wu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org To: hua.ma@linux.intel.com, yixin.zhu@linux.intel.com, chuanhua.lei@linux.intel.com, qi-ming.wu@intel.com Cc: linux-mips@linux-mips.org, linux-clk@vger.kernel.org, linux-serial@vger.kernel.org, devicetree@vger.kernel.org, Songjun Wu , Michael Turquette , Stephen Boyd , linux-kernel@vger.kernel.org, Rob Herring , Mark Rutland List-Id: devicetree@vger.kernel.org From: Yixin Zhu This patch adds binding documentation for grx500 clock controller. Signed-off-by: YiXin Zhu Signed-off-by: Songjun Wu --- Changes in v2: - Rewrite clock driver's dt-binding document according to Rob Herring's comments. - Simplify device tree docoment, remove some clock description. .../devicetree/bindings/clock/intel,grx500-clk.txt | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/intel,grx500-clk.txt diff --git a/Documentation/devicetree/bindings/clock/intel,grx500-clk.txt b/Documentation/devicetree/bindings/clock/intel,grx500-clk.txt new file mode 100644 index 000000000000..e54e1dad9196 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/intel,grx500-clk.txt @@ -0,0 +1,39 @@ +Device Tree Clock bindings for grx500 PLL controller. + +This binding uses the common clock binding: + Documentation/devicetree/bindings/clock/clock-bindings.txt + +The grx500 clock controller supplies clock to various controllers within the +SoC. + +Required properties for clock node +- compatible: Should be "intel,grx500-cgu". +- reg: physical base address of the controller and length of memory range. +- #clock-cells: should be 1. + +Optional Propteries: +- intel,osc-frequency: frequency of the osc clock. +if missing, driver will use clock rate defined in the driver. + +Example: Clock controller node: + + cgu: cgu@16200000 { + compatible = "intel,grx500-cgu", "syscon"; + reg = <0x16200000 0x200>; + #clock-cells = <1>; + }; + + +Example: UART controller node that consumes the clock generated by clock + controller. + + asc0: serial@16600000 { + compatible = "lantiq,asc"; + reg = <0x16600000 0x100000>; + interrupt-parent = <&gic>; + interrupts = , + , + ; + clocks = <&cgu CLK_SSX4>, <&cgu GCLK_UART>; + clock-names = "freq", "asc"; + }; -- 2.11.0