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| author |   Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2020-05-12 23:10:57 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-05-13 12:23:13 -0700 |
| commit | ee0b8e6d02186321be0ea4ec0fb2cbd35bec7e29 (patch) | |
| tree | 102742a5a69a4528c175bd9806271b957a223c14 /Documentation/devicetree | |
| parent | dt-bindings: net: meson-dwmac: Add the amlogic,rx-delay-ns property (diff) | |
| download | wireguard-linux-ee0b8e6d02186321be0ea4ec0fb2cbd35bec7e29.tar.xz wireguard-linux-ee0b8e6d02186321be0ea4ec0fb2cbd35bec7e29.zip | |
dt-bindings: net: dwmac-meson: Document the "timing-adjustment" clock
The PRG_ETHERNET registers can add an RX delay in RGMII mode. This
requires an internal re-timing circuit whose input clock is called
"timing adjustment clock". Document this clock input so the clock can be
enabled as needed.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml index 66074314e57a..64c20c92c07d 100644 --- a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml +++ b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml @@ -40,18 +40,22 @@ allOf: then: properties: clocks: + minItems: 3 + maxItems: 4 items: - description: GMAC main clock - description: First parent clock of the internal mux - description: Second parent clock of the internal mux + - description: The clock which drives the timing adjustment logic clock-names: minItems: 3 - maxItems: 3 + maxItems: 4 items: - const: stmmaceth - const: clkin0 - const: clkin1 + - const: timing-adjustment amlogic,tx-delay-ns: $ref: /schemas/types.yaml#definitions/uint32 @@ -120,7 +124,7 @@ examples: reg = <0xc9410000 0x10000>, <0xc8834540 0x8>; interrupts = <8>; interrupt-names = "macirq"; - clocks = <&clk_eth>, <&clkc_fclk_div2>, <&clk_mpll2>; - clock-names = "stmmaceth", "clkin0", "clkin1"; + clocks = <&clk_eth>, <&clk_fclk_div2>, <&clk_mpll2>, <&clk_fclk_div2>; + clock-names = "stmmaceth", "clkin0", "clkin1", "timing-adjustment"; phy-mode = "rgmii"; }; |