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mfd: syscon: Add hardware spinlock support

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Some system control registers need hardware spinlock to synchronize
between the multiple subsystems, so we should add hardware spinlock
support for syscon.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Baolin Wang
2017-12-25 14:37:10 +08:00
committed by Mark Brown
parent a4887813c3
commit 3bafc09e77
2 changed files with 27 additions and 0 deletions
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8
Documentation/devicetree/bindings/mfd/syscon.txt
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@@ -16,9 +16,17 @@ Required properties:
Optional property:
- reg-io-width: the size (in bytes) of the IO accesses that should be
performed on the device.
- hwlocks: reference to a phandle of a hardware spinlock provider node.
Examples:
gpr: iomuxc-gpr@20e0000 {
compatible = "fsl,imx6q-iomuxc-gpr", "syscon";
reg = <0x020e0000 0x38>;
hwlocks = <&hwlock1 1>;
};
hwlock1: hwspinlock@40500000 {
...
reg = <0x40500000 0x1000>;
#hwlock-cells = <1>;
};