Re: [PATCH v3 2/7] clk: hisilicon: add dt-binding document for Hi3519 CRG
From: Rob Herring <robh@kernel.org>
Date: 2015-12-11 15:19:19
Also in:
linux-arm-kernel, linux-clk, lkml
On Fri, Dec 11, 2015 at 03:45:16PM +0800, Jiancheng Xue wrote:
quoted hunk ↗ jump to hunk
add dt-binding document for Hi3519 CRG block Signed-off-by: Jiancheng Xue <redacted> --- .../devicetree/bindings/clock/hi3519-crg.txt | 46 ++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/hi3519-crg.txtdiff --git a/Documentation/devicetree/bindings/clock/hi3519-crg.txt b/Documentation/devicetree/bindings/clock/hi3519-crg.txt new file mode 100644 index 0000000..e0d30a4 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/hi3519-crg.txt@@ -0,0 +1,46 @@ +* Hisilicon Hi3519 Clock and Reset Generator(CRG) + +The Hi3519 CRG module provides clock and reset signals to various +controllers within the SoC. + +This binding uses the following bindings: + Documentation/devicetree/bindings/clock/clock-bindings.txt + Documentation/devicetree/bindings/reset/reset.txt + +Required Properties: + +- compatible: should be one of the following. + - "hisilicon,hi3519-crg" - controller compatible with Hi3519 SoC. + +- reg: physical base address of the controller and length of memory mapped + region. + +- #clock-cells: should be 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 <dt-bindings/clock/hi3519-clock.h>.
This header should be part of this patch.
+
+- #reset-cells: should be 2.
+
+A reset signal can be controlled by writing a bit register in the CRG module.
+The reset specifier consists of two cells. The first cell represents the
+register offset relative to the base address. The second cell represents the
+bit index in the register.
+
+Example: CRG nodes
+CRG: clock-reset-controller {clock-reset-controller@12010000
+ compatible = "hisilicon,hi3519-crg";
+ reg = <0x12010000 0x10000>;
+ #clock-cells = <1>;
+ #reset-cells = <2>;
+};
+
+Example: consumer nodes
+i2c0: i2c@0x12110000 {Drop '0x'
+ compatible = "hisilicon,hi3519-i2c"; + reg = <0x12110000 0x1000>; + clocks = <&CRG HI3519_I2C0_RST>;*/ + resets = <&CRG 0xE4 0>;
lowercase hex please
+}; -- 1.9.1