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net: netcp: ethss: enhancement to support NetCP 1.5 ethss
NetCP 1.5 available on newer K2 SoCs such as K2E and K2L introduced 3 variants of the ethss subsystem, 9 port, 5 port and 2 port. These have one host port towards the CPU and N external slave ports. To customize the driver for these new ethss sub systems, multiple compatibility strings are introduced. Currently some of parameters that are different on different variants such as number of ALE ports, stats modules and number of ports are defined through constants. These are now changed to variables in gbe_priv data that get set based on the compatibility string. This is required as there are no hardware identification registers available to distinguish among the variants of NetCP 1.5 ethss. However there is identification register available to differentiate between NetCP 1.4 vs NetCP 1.5 and the same is made use of in the code to differentiate them. For more reading on the details of this peripheral, please refer to the User Guide available at http://www.ti.com/lit/pdf/spruhz3 Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: WingMan Kwok <w-kwok2@ti.com> CC: "David S. Miller" <davem@davemloft.net> CC: Mugunthan V N <mugunthanvnm@ti.com> CC: "Lad, Prabhakar" <prabhakar.csengg@gmail.com> CC: Grygorii Strashko <grygorii.strashko@ti.com> CC: Christoph Jaeger <cj@linux.com> CC: Lokesh Vutla <lokeshvutla@ti.com> CC: Markus Pargmann <mpa@pengutronix.de> CC: Kumar Gala <galak@codeaurora.org> CC: Ian Campbell <ijc+devicetree@hellion.org.uk> CC: Mark Rutland <mark.rutland@arm.com> CC: Pawel Moll <pawel.moll@arm.com> CC: Rob Herring <robh+dt@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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‎Documentation/devicetree/bindings/net/keystone-netcp.txt

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@@ -65,12 +65,30 @@ NetCP device properties: Device specification for NetCP sub-modules.
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1Gb/10Gb (gbe/xgbe) ethernet switch sub-module specifications.
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Required properties:
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- label: Must be "netcp-gbe" for 1Gb & "netcp-xgbe" for 10Gb.
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- compatible: Must be one of below:-
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"ti,netcp-gbe" for 1GbE on NetCP 1.4
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"ti,netcp-gbe-5" for 1GbE N NetCP 1.5 (N=5)
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"ti,netcp-gbe-9" for 1GbE N NetCP 1.5 (N=9)
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"ti,netcp-gbe-2" for 1GbE N NetCP 1.5 (N=2)
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"ti,netcp-xgbe" for 10 GbE
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- reg: register location and the size for the following register
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regions in the specified order.
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- switch subsystem registers
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- sgmii port3/4 module registers (only for NetCP 1.4)
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- switch module registers
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- serdes registers (only for 10G)
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NetCP 1.4 ethss, here is the order
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index #0 - switch subsystem registers
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index #1 - sgmii port3/4 module registers
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index #2 - switch module registers
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NetCP 1.5 ethss 9 port, 5 port and 2 port
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index #0 - switch subsystem registers
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index #1 - switch module registers
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index #2 - serdes registers
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- tx-channel: the navigator packet dma channel name for tx.
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- tx-queue: the navigator queue number associated with the tx dma channel.
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- interfaces: specification for each of the switch port to be registered as a

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