netdev - [PATCH net-next 1/2] dt-bindings: net: xilinx

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Message-Id: <20210311201117.3802311-2-robert.hancock@calian.com>
Date:   Thu, 11 Mar 2021 14:11:16 -0600
From:   Robert Hancock <robert.hancock@...ian.com>
To:     radhey.shyam.pandey@...inx.com, davem@...emloft.net,
        kuba@...nel.org
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        Robert Hancock <robert.hancock@...ian.com>
Subject: [PATCH net-next 1/2] dt-bindings: net: xilinx_axienet: Document additional clocks

Update DT bindings to describe all of the clocks that the axienet
driver will now be able to make use of.

Signed-off-by: Robert Hancock <robert.hancock@...ian.com>
---
 .../bindings/net/xilinx_axienet.txt           | 23 ++++++++++++++-----
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/xilinx_axienet.txt b/Documentation/devicetree/bindings/net/xilinx_axienet.txt
index 2cd452419ed0..1ee1c6c5fc66 100644
--- a/Documentation/devicetree/bindings/net/xilinx_axienet.txt
+++ b/Documentation/devicetree/bindings/net/xilinx_axienet.txt
@@ -42,11 +42,21 @@ Optional properties:
 		  support both 1000BaseX and SGMII modes. If set, the phy-mode
 		  should be set to match the mode selected on core reset (i.e.
 		  by the basex_or_sgmii core input line).
-- clocks	: AXI bus clock for the device. Refer to common clock bindings.
-		  Used to calculate MDIO clock divisor. If not specified, it is
-		  auto-detected from the CPU clock (but only on platforms where
-		  this is possible). New device trees should specify this - the
-		  auto detection is only for backward compatibility.
+- clock-names: 	  Tuple listing input clock names. Possible clocks:
+		  s_axi_lite_clk: Clock for AXI register slave interface
+		  axis_clk: AXI stream clock for DMA block
+		  ref_clk: Ethernet reference clock
+		  mgt_clk: MGT reference clock (used by internal PCS/PMA PHY)
+
+		  Note that if s_axi_lite_clk is not specified by name, the
+		  first clock of any name is used for this. If that is also not
+		  specified, the clock rate is auto-detected from the CPU clock
+		  (but only on platforms where this is possible). New device
+		  trees should specify all applicable clocks by name - the
+		  fallbacks to an unnamed clock or to CPU clock are only for
+		  backward compatibility.
+- clocks: 	  Phandles to input clocks matching clock-names. Refer to common
+		  clock bindings.
 - axistream-connected: Reference to another node which contains the resources
 		       for the AXI DMA controller used by this device.
 		       If this is specified, the DMA-related resources from that
@@ -62,7 +72,8 @@ Example:
 		device_type = "network";
 		interrupt-parent = <&microblaze_0_axi_intc>;
 		interrupts = <2 0 1>;
-		clocks = <&axi_clk>;
+		clock-names = "s_axi_lite_clk", "axis_clk", "ref_clk", "mgt_clk";
+		clocks = <&axi_clk>, <&axi_clk>, <&pl_enet_ref_clk>, <&mgt_clk>;
 		phy-mode = "mii";
 		reg = <0x40c00000 0x40000 0x50c00000 0x40000>;
 		xlnx,rxcsum = <0x2>;
-- 
2.27.0