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| author |   Baolin Wang <baolin.wang@linaro.org> | 2017-12-25 14:37:10 +0800 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2018-01-12 18:32:55 +0000 |
| commit | 3bafc09e779710abaa7b836fe3bbeeeab7754c2b (patch) | |
| tree | 1c78fbe67c3ca13bf771978047d3582079766415 /Documentation/devicetree/bindings/mfd | |
| parent | regmap: Add one flag to indicate if a hwlock should be used (diff) | |
| download | linux-dev-3bafc09e779710abaa7b836fe3bbeeeab7754c2b.tar.xz linux-dev-3bafc09e779710abaa7b836fe3bbeeeab7754c2b.zip | |
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.txt | 8 |
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>; }; |