linux-kernel - [PATCH net-next v2 1/2] dt-bindings: net: cdns,macb: Add rx-watermark property

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Message-ID: <20230511071214.18611-2-pranavi.somisetty@amd.com>
Date:   Thu, 11 May 2023 01:12:13 -0600
From:   Pranavi Somisetty <pranavi.somisetty@....com>
To:     <nicolas.ferre@...rochip.com>, <claudiu.beznea@...rochip.com>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <richardcochran@...il.com>,
        <linux@...linux.org.uk>, <palmer@...belt.com>
CC:     <git@....com>, <michal.simek@....com>, <harini.katakam@....com>,
        <radhey.shyam.pandey@....com>, <pranavi.somisetty@....com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>
Subject: [PATCH net-next v2 1/2] dt-bindings: net: cdns,macb: Add rx-watermark property

watermark value is the minimum amount of packet data
required to activate the forwarding process. The watermark
implementation and maximum size is dependent on the device
where Cadence MACB/GEM is used.

Signed-off-by: Pranavi Somisetty <pranavi.somisetty@....com>
---
 Documentation/devicetree/bindings/net/cdns,macb.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/cdns,macb.yaml b/Documentation/devicetree/bindings/net/cdns,macb.yaml
index bef5e0f895be..779bc25cf005 100644
--- a/Documentation/devicetree/bindings/net/cdns,macb.yaml
+++ b/Documentation/devicetree/bindings/net/cdns,macb.yaml
@@ -109,6 +109,13 @@ properties:
   power-domains:
     maxItems: 1
 
+  rx-watermark:
+    maxItems: 1
+    $ref: /schemas/types.yaml#/definitions/uint16
+    description:
+      Set watermark value for pbuf_rxcutthru reg and enable
+      rx partial store and forward.
+
   '#address-cells':
     const: 1
 
@@ -166,6 +173,7 @@ examples:
             compatible = "cdns,macb";
             reg = <0xfffc4000 0x4000>;
             interrupts = <21>;
+            rx-watermark = /bits/ 16 <0x44>;
             phy-mode = "rmii";
             local-mac-address = [3a 0e 03 04 05 06];
             clock-names = "pclk", "hclk", "tx_clk";
-- 
2.36.1