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f1eea5c15a
Commit1f71e8c96f("drivers: net: cpsw: Add support for fixed-link PHY") did not parse the "phy-mode" property in the case of a fixed-link PHY, leaving slave_data->phy_if with its default of PHY_INTERFACE_MODE_NA(0). This later gets passed to phy_connect() in cpsw_slave_open(), and eventually to cpsw_phy_sel() where it hits a default case that configures the MAC for MII mode. The user visible symptom is that while kernel log messages seem to indicate that the interface is set up, there is no network communication. Eventually a watchdog error occurs: NETDEV WATCHDOG: eth0 (cpsw): transmit queue 0 timed out Fixes:1f71e8c96f("drivers: net: cpsw: Add support for fixed-link PHY") Signed-off-by: David Rivshin <drivshin@allworx.com> Signed-off-by: David S. Miller <davem@davemloft.net>
122 lines
3.8 KiB
Plaintext
122 lines
3.8 KiB
Plaintext
TI SoC Ethernet Switch Controller Device Tree Bindings
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------------------------------------------------------
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Required properties:
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- compatible : Should be one of the below:-
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"ti,cpsw" for backward compatible
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"ti,am335x-cpsw" for AM335x controllers
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"ti,am4372-cpsw" for AM437x controllers
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"ti,dra7-cpsw" for DRA7x controllers
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- reg : physical base address and size of the cpsw
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registers map
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- interrupts : property with a value describing the interrupt
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number
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- interrupt-parent : The parent interrupt controller
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- cpdma_channels : Specifies number of channels in CPDMA
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- ale_entries : Specifies No of entries ALE can hold
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- bd_ram_size : Specifies internal descriptor RAM size
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- rx_descs : Specifies number of Rx descriptors
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- mac_control : Specifies Default MAC control register content
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for the specific platform
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- slaves : Specifies number for slaves
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- active_slave : Specifies the slave to use for time stamping,
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ethtool and SIOCGMIIPHY
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- cpts_clock_mult : Numerator to convert input clock ticks into nanoseconds
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- cpts_clock_shift : Denominator to convert input clock ticks into nanoseconds
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Optional properties:
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- ti,hwmods : Must be "cpgmac0"
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- no_bd_ram : Must be 0 or 1
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- dual_emac : Specifies Switch to act as Dual EMAC
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- syscon : Phandle to the system control device node, which is
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the control module device of the am33x
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- mode-gpios : Should be added if one/multiple gpio lines are
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required to be driven so that cpsw data lines
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can be connected to the phy via selective mux.
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For example in dra72x-evm, pcf gpio has to be
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driven low so that cpsw slave 0 and phy data
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lines are connected via mux.
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Slave Properties:
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Required properties:
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- phy-mode : See ethernet.txt file in the same directory
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Optional properties:
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- dual_emac_res_vlan : Specifies VID to be used to segregate the ports
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- mac-address : See ethernet.txt file in the same directory
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- phy_id : Specifies slave phy id
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- phy-handle : See ethernet.txt file in the same directory
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Slave sub-nodes:
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- fixed-link : See fixed-link.txt file in the same directory
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Either the property phy_id, or the sub-node
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fixed-link can be specified
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Note: "ti,hwmods" field is used to fetch the base address and irq
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resources from TI, omap hwmod data base during device registration.
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Future plan is to migrate hwmod data base contents into device tree
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blob so that, all the required data will be used from device tree dts
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file.
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Examples:
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mac: ethernet@4A100000 {
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compatible = "ti,cpsw";
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reg = <0x4A100000 0x1000>;
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interrupts = <55 0x4>;
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interrupt-parent = <&intc>;
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cpdma_channels = <8>;
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ale_entries = <1024>;
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bd_ram_size = <0x2000>;
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no_bd_ram = <0>;
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rx_descs = <64>;
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mac_control = <0x20>;
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slaves = <2>;
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active_slave = <0>;
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cpts_clock_mult = <0x80000000>;
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cpts_clock_shift = <29>;
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syscon = <&cm>;
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cpsw_emac0: slave@0 {
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phy_id = <&davinci_mdio>, <0>;
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phy-mode = "rgmii-txid";
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/* Filled in by U-Boot */
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mac-address = [ 00 00 00 00 00 00 ];
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};
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cpsw_emac1: slave@1 {
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phy_id = <&davinci_mdio>, <1>;
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phy-mode = "rgmii-txid";
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/* Filled in by U-Boot */
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mac-address = [ 00 00 00 00 00 00 ];
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};
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};
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(or)
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mac: ethernet@4A100000 {
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compatible = "ti,cpsw";
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ti,hwmods = "cpgmac0";
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cpdma_channels = <8>;
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ale_entries = <1024>;
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bd_ram_size = <0x2000>;
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no_bd_ram = <0>;
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rx_descs = <64>;
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mac_control = <0x20>;
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slaves = <2>;
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active_slave = <0>;
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cpts_clock_mult = <0x80000000>;
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cpts_clock_shift = <29>;
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syscon = <&cm>;
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cpsw_emac0: slave@0 {
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phy_id = <&davinci_mdio>, <0>;
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phy-mode = "rgmii-txid";
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/* Filled in by U-Boot */
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mac-address = [ 00 00 00 00 00 00 ];
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};
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cpsw_emac1: slave@1 {
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phy_id = <&davinci_mdio>, <1>;
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phy-mode = "rgmii-txid";
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/* Filled in by U-Boot */
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mac-address = [ 00 00 00 00 00 00 ];
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};
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};
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