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authorZhangfei Gao <zhangfei.gao@linaro.org>2016-12-09 10:11:44 +0800
committerPhilipp Zabel <p.zabel@pengutronix.de>2017-01-09 10:38:58 +0100
commit836e235495838760f1b8458f462c76404fb7b140 (patch)
tree3acf9385017a4af2077e5ee964946331b49c30ac /Documentation/devicetree/bindings/reset
parent5987b4bf512101137fa60c5c0ccac3db51541221 (diff)
dt-bindings: Document the hi3660 reset bindings
Add DT bindings documentation for hi3660 SoC reset controller. Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'Documentation/devicetree/bindings/reset')
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+Hisilicon System Reset Controller
+======================================
+
+Please also refer to reset.txt in this directory for common reset
+controller binding usage.
+
+The reset controller registers are part of the system-ctl block on
+hi3660 SoC.
+
+Required properties:
+- compatible: should be
+ "hisilicon,hi3660-reset"
+- hisi,rst-syscon: phandle of the reset's syscon.
+- #reset-cells : Specifies the number of cells needed to encode a
+ reset source. The type shall be a <u32> and the value shall be 2.
+
+ Cell #1 : offset of the reset assert control
+ register from the syscon register base
+ offset + 4: deassert control register
+ offset + 8: status control register
+ Cell #2 : bit position of the reset in the reset control register
+
+Example:
+ iomcu: iomcu@ffd7e000 {
+ compatible = "hisilicon,hi3660-iomcu", "syscon";
+ reg = <0x0 0xffd7e000 0x0 0x1000>;
+ };
+
+ iomcu_rst: iomcu_rst_controller {
+ compatible = "hisilicon,hi3660-reset";
+ hisi,rst-syscon = <&iomcu>;
+ #reset-cells = <2>;
+ };
+
+Specifying reset lines connected to IP modules
+==============================================
+example:
+
+ i2c0: i2c@..... {
+ ...
+ resets = <&iomcu_rst 0x20 3>; /* offset: 0x20; bit: 3 */
+ ...
+ };