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authorBaolin Wang <baolin.wang@linaro.org>2017-12-25 09:37:10 +0300
committerMark Brown <broonie@kernel.org>2018-01-12 21:32:55 +0300
commit3bafc09e779710abaa7b836fe3bbeeeab7754c2b (patch)
tree1c78fbe67c3ca13bf771978047d3582079766415 /Documentation/devicetree/bindings/mfd
parenta4887813c3a9481ab87c8a71ab1de50b975cc823 (diff)
downloadlinux-3bafc09e779710abaa7b836fe3bbeeeab7754c2b.tar.xz
mfd: syscon: Add hardware spinlock support
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>
Diffstat (limited to 'Documentation/devicetree/bindings/mfd')
-rw-r--r--Documentation/devicetree/bindings/mfd/syscon.txt8
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mfd/syscon.txt b/Documentation/devicetree/bindings/mfd/syscon.txt
index 8b92d4576c42..25d9e9c2fd53 100644
--- a/Documentation/devicetree/bindings/mfd/syscon.txt
+++ b/Documentation/devicetree/bindings/mfd/syscon.txt
@@ -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>;
};