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dt-bindings: Document the hi3660 reset bindings

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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>
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Zhangfei Gao 2016-12-09 10:11:44 +08:00 committed by Philipp Zabel
parent 5987b4bf51
commit 836e235495
1 changed files with 43 additions and 0 deletions
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Documentation/devicetree/bindings/reset/hisilicon,hi3660-reset.txt Normal file
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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 */
...
};