| Message ID | 20220325041451.894-2-dylan_hung@aspeedtech.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add reset deassertion for Aspeed MDIO | expand |
On 25/03/2022 05:14, Dylan Hung wrote: > 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. > > Signed-off-by: Dylan Hung <dylan_hung@aspeedtech.com> > --- > .../devicetree/bindings/net/aspeed,ast2600-mdio.yaml | 5 +++++ > 1 file changed, 5 insertions(+) > Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Best regards, Krzysztof
diff --git a/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml b/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml index 1c88820cbcdf..7f43b4fe86a3 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 @@ -39,6 +43,7 @@ examples: reg = <0x1e650000 0x8>; #address-cells = <1>; #size-cells = <0>; + resets = <&syscon 35>; ethphy0: ethernet-phy@0 { compatible = "ethernet-phy-ieee802.3-c22";
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. Signed-off-by: Dylan Hung <dylan_hung@aspeedtech.com> --- .../devicetree/bindings/net/aspeed,ast2600-mdio.yaml | 5 +++++ 1 file changed, 5 insertions(+)