drivers: net: ethernet: cpsw: Add device tree support to CPSW

This patch adds device tree support for cpsw driver

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 104 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt
new file mode 100644
index 000000000000..acca48c4246d
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/cpsw.txt
@@ -0,0 +1,104 @@
+TI SoC Ethernet Switch Controller Device Tree Bindings
+------------------------------------------------------
+
+Required properties:
+- compatible            : Should be "ti,cpsw"
+- reg                   : physical base address and size of the cpsw
+                          registers map
+- interrupts            : property with a value describing the interrupt
+                          number
+- interrupt-parent      : The parent interrupt controller
+- cpdma_channels        : Specifies number of channels in CPDMA
+- host_port_no          : Specifies host port shift
+- cpdma_reg_ofs         : Specifies CPDMA submodule register offset
+- ale_reg_ofs           : Specifies ALE submodule register offset
+- ale_entries           : Specifies No of entries ALE can hold
+- host_port_reg_ofs     : Specifies host port register offset
+- hw_stats_reg_ofs      : Specifies hardware statistics register offset
+- bd_ram_ofs            : Specifies internal desciptor RAM offset
+- bd_ram_size           : Specifies internal descriptor RAM size
+- rx_descs              : Specifies number of Rx descriptors
+- mac_control           : Specifies Default MAC control register content
+                          for the specific platform
+- slaves                : Specifies number for slaves
+- slave_reg_ofs         : Specifies slave register offset
+- sliver_reg_ofs        : Specifies slave sliver register offset
+- phy_id                : Specifies slave phy id
+- mac-address           : Specifies slave MAC address
+
+Optional properties:
+- ti,hwmods             : Must be "cpgmac0"
+- no_bd_ram             : Must be 0 or 1
+
+Note: "ti,hwmods" field is used to fetch the base address and irq
+resources from TI, omap hwmod data base during device registration.
+Future plan is to migrate hwmod data base contents into device tree
+blob so that, all the required data will be used from device tree dts
+file.
+
+Examples:
+
+        mac: ethernet@4A100000 {
+                compatible = "ti,cpsw";
+                reg = <0x4A100000 0x1000>;
+                interrupts = <55 0x4>;
+                interrupt-parent = <&intc>;
+                cpdma_channels = 8;
+                host_port_no = 0;
+                cpdma_reg_ofs = 0x800;
+                ale_reg_ofs = 0xd00;
+                ale_entries = 1024;
+                host_port_reg_ofs = 0x108;
+                hw_stats_reg_ofs = 0x900;
+                bd_ram_ofs = 0x2000;
+                bd_ram_size = 0x2000;
+                no_bd_ram = 0;
+                rx_descs = 64;
+                mac_control = 0x20;
+                slaves = 2;
+                slave@0 {
+                        slave_reg_ofs = 0x208;
+                        sliver_reg_ofs = 0xd80;
+                        phy_id = "davinci_mdio-0:00"
+                        mac-address = [00 04 9F 01 1B B8];
+                };
+                slave@1 {
+                        slave_reg_ofs = 0x208;
+                        sliver_reg_ofs = 0xd80;
+                        phy_id = "davinci_mdio-0:01"
+                        mac-address = [00 04 9F 01 1B B9];
+                };
+        };
+
+(or)
+
+        mac: ethernet@4A100000 {
+                compatible = "ti,cpsw";
+                ti,hwmods = "cpgmac0";
+                cpdma_channels = 8;
+                host_port_no = 0;
+                cpdma_reg_ofs = 0x800;
+                ale_reg_ofs = 0xd00;
+                ale_entries = 1024;
+                host_port_reg_ofs = 0x108;
+                hw_stats_reg_ofs = 0x900;
+                bd_ram_ofs = 0x2000;
+                bd_ram_size = 0x2000;
+                no_bd_ram = 0;
+                rx_descs = 64;
+                mac_control = 0x20;
+                slaves = 2;
+                slave@0 {
+                        slave_reg_ofs = 0x208;
+                        sliver_reg_ofs = 0xd80;
+                        phy_id = "davinci_mdio-0:00"
+                        mac-address = [00 04 9F 01 1B B8];
+                };
+                slave@1 {
+                        slave_reg_ofs = 0x208;
+                        sliver_reg_ofs = 0xd80;
+                        phy_id = "davinci_mdio-0:01"
+                        mac-address = [00 04 9F 01 1B B9];
+                };
+
+        };