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[79.195.234.119]) by smtp.googlemail.com with ESMTPSA id g138sm14342953wme.39.2020.11.14.12.01.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Nov 2020 12:01:48 -0800 (PST) From: Martin Blumenstingl To: davem@davemloft.net, kuba@kernel.org, linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org, robh+dt@kernel.org Cc: jianxin.pan@amlogic.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, khilman@baylibre.com, narmstrong@baylibre.com, jbrunet@baylibre.com, andrew@lunn.ch, Martin Blumenstingl Subject: [PATCH RFC v1 1/4] dt-bindings: net: dwmac-meson: use picoseconds for the RGMII RX delay Date: Sat, 14 Nov 2020 21:01:01 +0100 Message-Id: <20201114200104.4148283-2-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201114200104.4148283-1-martin.blumenstingl@googlemail.com> References: <20201114200104.4148283-1-martin.blumenstingl@googlemail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Amlogic Meson G12A, G12B and SM1 SoCs have a more advanced RGMII RX delay register which allows picoseconds precision. Deprecate the old "amlogic,rx-delay-ns" in favour of a new "amlogic,rgmii-rx-delay-ps" property. For older SoCs the only known supported values were 0ns and 2ns. The new SoCs have 200ps precision and support RGMII RX delays between 0ps and 3000ps. Signed-off-by: Martin Blumenstingl --- .../bindings/net/amlogic,meson-dwmac.yaml | 52 ++++++++++++++++++- 1 file changed, 51 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml index 6b057b117aa0..bafde1194193 100644 --- a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml +++ b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml @@ -74,18 +74,68 @@ allOf: Any configuration is ignored when the phy-mode is set to "rmii". amlogic,rx-delay-ns: + deprecated: true enum: - 0 - 2 default: 0 + description: + The internal RGMII RX clock delay in nanoseconds. Deprecated, use + amlogic,rgmii-rx-delay-ps instead. + + amlogic,rgmii-rx-delay-ps: + default: 0 description: The internal RGMII RX clock delay (provided by this IP block) in - nanoseconds. When phy-mode is set to "rgmii" then the RX delay + picoseconds. When phy-mode is set to "rgmii" then the RX delay should be explicitly configured. When the phy-mode is set to either "rgmii-id" or "rgmii-rxid" the RX clock delay is already provided by the PHY. Any configuration is ignored when the phy-mode is set to "rmii". + - if: + properties: + compatible: + contains: + enum: + - amlogic,meson8b-dwmac + - amlogic,meson8m2-dwmac + - amlogic,meson-gxbb-dwmac + - amlogic,meson-axg-dwmac + then: + properties: + amlogic,rgmii-rx-delay-ps: + enum: + - 0 + - 2000 + + - if: + properties: + compatible: + contains: + enum: + - amlogic,meson-g12a-dwmac + then: + properties: + amlogic,rgmii-rx-delay-ps: + enum: + - 0 + - 200 + - 400 + - 600 + - 800 + - 1000 + - 1200 + - 1400 + - 1600 + - 1800 + - 2000 + - 2200 + - 2400 + - 2600 + - 2800 + - 3000 + properties: compatible: additionalItems: true -- 2.29.2