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| author | Dylan Hung <dylan_hung@aspeedtech.com> | 2022-04-18 04:40:57 +0300 |
|---|---|---|
| committer | Joel Stanley <joel@jms.id.au> | 2022-04-19 03:20:39 +0300 |
| commit | 51ae335a9f7dd2ee3b11f68fd134dbde75750d7c (patch) | |
| tree | 50e5a507b32fe089c30259a97f74c222d7a6fdc0 /Documentation | |
| parent | 714efc696528643b5b76ce1eba4e682b655bb272 (diff) | |
| download | linux-51ae335a9f7dd2ee3b11f68fd134dbde75750d7c.tar.xz | |
dt-bindings: net: add reset property for aspeed, ast2600-mdio binding
The AST2600 MDIO bus controller has a reset control bit and must be
deasserted before manipulating the MDIO controller. By default, the
hardware asserts the reset so the driver only need to deassert it.
Regarding to the old DT blobs which don't have reset property in them,
the reset deassertion is usually done by the bootloader so the reset
property is optional to work with them.
OpenBMC-Staging-Count: 1
Signed-off-by: Dylan Hung <dylan_hung@aspeedtech.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20220418014059.3054-2-dylan_hung@aspeedtech.com
Signed-off-by: Joel Stanley <joel@jms.id.au>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml b/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml index 1c88820cbcdf..f81eda8cb0a5 100644 --- a/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml +++ b/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml @@ -20,10 +20,14 @@ allOf: properties: compatible: const: aspeed,ast2600-mdio + reg: maxItems: 1 description: The register range of the MDIO controller instance + resets: + maxItems: 1 + required: - compatible - reg @@ -34,11 +38,13 @@ unevaluatedProperties: false examples: - | + #include <dt-bindings/clock/ast2600-clock.h> mdio0: mdio@1e650000 { compatible = "aspeed,ast2600-mdio"; reg = <0x1e650000 0x8>; #address-cells = <1>; #size-cells = <0>; + resets = <&syscon ASPEED_RESET_MII>; ethphy0: ethernet-phy@0 { compatible = "ethernet-phy-ieee802.3-c22"; |