1 Marvell Discovery mv64[345]6x System Controller chips
2 ===========================================================
4 The Marvell mv64[345]60 series of system controller chips contain
5 many of the peripherals needed to implement a complete computer
6 system. In this section, we define device tree nodes to describe
7 the system controller chip itself and each of the peripherals
8 which it contains. Compatible string values for each node are
9 prefixed with the string "marvell,", for Marvell Technology Group Ltd.
11 1) The /system-controller node
13 This node is used to represent the system-controller and must be
14 present when the system uses a system controller chip. The top-level
15 system-controller node contains information that is global to all
16 devices within the system controller chip. The node name begins
17 with "system-controller" followed by the unit address, which is
18 the base address of the memory-mapped register set for the system
23 - ranges : Describes the translation of system controller addresses
24 for memory mapped registers.
25 - clock-frequency: Contains the main clock frequency for the system
27 - reg : This property defines the address and size of the
28 memory-mapped registers contained within the system controller
29 chip. The address specified in the "reg" property should match
30 the unit address of the system-controller node.
31 - #address-cells : Address representation for system controller
32 devices. This field represents the number of cells needed to
33 represent the address of the memory-mapped registers of devices
34 within the system controller chip.
35 - #size-cells : Size representation for for the memory-mapped
36 registers within the system controller chip.
37 - #interrupt-cells : Defines the width of cells used to represent
42 - model : The specific model of the system controller chip. Such
43 as, "mv64360", "mv64460", or "mv64560".
44 - compatible : A string identifying the compatibility identifiers
45 of the system controller chip.
47 The system-controller node contains child nodes for each system
48 controller device that the platform uses. Nodes should not be created
49 for devices which exist on the system controller chip but are not used
51 Example Marvell Discovery mv64360 system-controller node:
53 system-controller@f1000000 { /* Marvell Discovery mv64360 */
56 model = "mv64360"; /* Default */
57 compatible = "marvell,mv64360";
58 clock-frequency = <133333333>;
59 reg = <0xf1000000 0x10000>;
60 virtual-reg = <0xf1000000>;
61 ranges = <0x88000000 0x88000000 0x1000000 /* PCI 0 I/O Space */
62 0x80000000 0x80000000 0x8000000 /* PCI 0 MEM Space */
63 0xa0000000 0xa0000000 0x4000000 /* User FLASH */
64 0x00000000 0xf1000000 0x0010000 /* Bridge's regs */
65 0xf2000000 0xf2000000 0x0040000>;/* Integrated SRAM */
67 [ child node definitions... ]
70 2) Child nodes of /system-controller
72 a) Marvell Discovery MDIO bus
74 The MDIO is a bus to which the PHY devices are connected. For each
75 device that exists on this bus, a child node should be created. See
76 the definition of the PHY node below for an example of how to define
80 - #address-cells : Should be <1>
81 - #size-cells : Should be <0>
82 - device_type : Should be "mdio"
83 - compatible : Should be "marvell,mv64360-mdio"
91 compatible = "marvell,mv64360-mdio";
99 b) Marvell Discovery ethernet controller
101 The Discover ethernet controller is described with two levels
102 of nodes. The first level describes an ethernet silicon block
103 and the second level describes up to 3 ethernet nodes within
104 that block. The reason for the multiple levels is that the
105 registers for the node are interleaved within a single set
106 of registers. The "ethernet-block" level describes the
107 shared register set, and the "ethernet" nodes describe ethernet
108 port-specific properties.
113 - #address-cells : <1>
115 - compatible : "marvell,mv64360-eth-block"
116 - reg : Offset and length of the register set for this block
118 Example Discovery Ethernet block node:
119 ethernet-block@2000 {
120 #address-cells = <1>;
122 compatible = "marvell,mv64360-eth-block";
123 reg = <0x2000 0x2000>;
132 - device_type : Should be "network".
133 - compatible : Should be "marvell,mv64360-eth".
134 - reg : Should be <0>, <1>, or <2>, according to which registers
135 within the silicon block the device uses.
136 - interrupts : <a> where a is the interrupt number for the port.
137 - interrupt-parent : the phandle for the interrupt controller
138 that services interrupts for this device.
139 - phy : the phandle for the PHY connected to this ethernet
141 - local-mac-address : 6 bytes, MAC address
143 Example Discovery Ethernet port node:
145 device_type = "network";
146 compatible = "marvell,mv64360-eth";
149 interrupt-parent = <&PIC>;
151 local-mac-address = [ 00 00 00 00 00 00 ];
156 c) Marvell Discovery PHY nodes
159 - device_type : Should be "ethernet-phy"
160 - interrupts : <a> where a is the interrupt number for this phy.
161 - interrupt-parent : the phandle for the interrupt controller that
162 services interrupts for this device.
163 - reg : The ID number for the phy, usually a small integer
165 Example Discovery PHY node:
167 device_type = "ethernet-phy";
168 compatible = "broadcom,bcm5421";
169 interrupts = <76>; /* GPP 12 */
170 interrupt-parent = <&PIC>;
175 d) Marvell Discovery SDMA nodes
177 Represent DMA hardware associated with the MPSC (multiprotocol
181 - compatible : "marvell,mv64360-sdma"
182 - reg : Offset and length of the register set for this device
183 - interrupts : <a> where a is the interrupt number for the DMA
185 - interrupt-parent : the phandle for the interrupt controller
186 that services interrupts for this device.
188 Example Discovery SDMA node:
190 compatible = "marvell,mv64360-sdma";
191 reg = <0x4000 0xc18>;
192 virtual-reg = <0xf1004000>;
194 interrupt-parent = <&PIC>;
198 e) Marvell Discovery BRG nodes
200 Represent baud rate generator hardware associated with the MPSC
201 (multiprotocol serial controllers).
204 - compatible : "marvell,mv64360-brg"
205 - reg : Offset and length of the register set for this device
206 - clock-src : A value from 0 to 15 which selects the clock
207 source for the baud rate generator. This value corresponds
208 to the CLKS value in the BRGx configuration register. See
209 the mv64x60 User's Manual.
210 - clock-frequence : The frequency (in Hz) of the baud rate
211 generator's input clock.
212 - current-speed : The current speed setting (presumably by
213 firmware) of the baud rate generator.
215 Example Discovery BRG node:
217 compatible = "marvell,mv64360-brg";
220 clock-frequency = <133333333>;
221 current-speed = <9600>;
225 f) Marvell Discovery CUNIT nodes
227 Represent the Serial Communications Unit device hardware.
230 - reg : Offset and length of the register set for this device
232 Example Discovery CUNIT node:
234 reg = <0xf200 0x200>;
238 g) Marvell Discovery MPSCROUTING nodes
240 Represent the Discovery's MPSC routing hardware
243 - reg : Offset and length of the register set for this device
245 Example Discovery CUNIT node:
251 h) Marvell Discovery MPSCINTR nodes
253 Represent the Discovery's MPSC DMA interrupt hardware registers
254 (SDMA cause and mask registers).
257 - reg : Offset and length of the register set for this device
259 Example Discovery MPSCINTR node:
261 reg = <0xb800 0x100>;
265 i) Marvell Discovery MPSC nodes
267 Represent the Discovery's MPSC (Multiprotocol Serial Controller)
271 - device_type : "serial"
272 - compatible : "marvell,mv64360-mpsc"
273 - reg : Offset and length of the register set for this device
274 - sdma : the phandle for the SDMA node used by this port
275 - brg : the phandle for the BRG node used by this port
276 - cunit : the phandle for the CUNIT node used by this port
277 - mpscrouting : the phandle for the MPSCROUTING node used by this port
278 - mpscintr : the phandle for the MPSCINTR node used by this port
279 - cell-index : the hardware index of this cell in the MPSC core
280 - max_idle : value needed for MPSC CHR3 (Maximum Frame Length)
282 - interrupts : <a> where a is the interrupt number for the MPSC.
283 - interrupt-parent : the phandle for the interrupt controller
284 that services interrupts for this device.
286 Example Discovery MPSCINTR node:
288 device_type = "serial";
289 compatible = "marvell,mv64360-mpsc";
291 virtual-reg = <0xf1008000>;
295 mpscrouting = <&MPSCROUTING>;
296 mpscintr = <&MPSCINTR>;
300 interrupt-parent = <&PIC>;
304 j) Marvell Discovery Watch Dog Timer nodes
306 Represent the Discovery's watchdog timer hardware
309 - compatible : "marvell,mv64360-wdt"
310 - reg : Offset and length of the register set for this device
312 Example Discovery Watch Dog Timer node:
314 compatible = "marvell,mv64360-wdt";
319 k) Marvell Discovery I2C nodes
321 Represent the Discovery's I2C hardware
324 - device_type : "i2c"
325 - compatible : "marvell,mv64360-i2c"
326 - reg : Offset and length of the register set for this device
327 - interrupts : <a> where a is the interrupt number for the I2C.
328 - interrupt-parent : the phandle for the interrupt controller
329 that services interrupts for this device.
331 Example Discovery I2C node:
332 compatible = "marvell,mv64360-i2c";
334 virtual-reg = <0xf100c000>;
336 interrupt-parent = <&PIC>;
340 l) Marvell Discovery PIC (Programmable Interrupt Controller) nodes
342 Represent the Discovery's PIC hardware
345 - #interrupt-cells : <1>
346 - #address-cells : <0>
347 - compatible : "marvell,mv64360-pic"
348 - reg : Offset and length of the register set for this device
349 - interrupt-controller
351 Example Discovery PIC node:
353 #interrupt-cells = <1>;
354 #address-cells = <0>;
355 compatible = "marvell,mv64360-pic";
357 interrupt-controller;
361 m) Marvell Discovery MPP (Multipurpose Pins) multiplexing nodes
363 Represent the Discovery's MPP hardware
366 - compatible : "marvell,mv64360-mpp"
367 - reg : Offset and length of the register set for this device
369 Example Discovery MPP node:
371 compatible = "marvell,mv64360-mpp";
376 n) Marvell Discovery GPP (General Purpose Pins) nodes
378 Represent the Discovery's GPP hardware
381 - compatible : "marvell,mv64360-gpp"
382 - reg : Offset and length of the register set for this device
384 Example Discovery GPP node:
386 compatible = "marvell,mv64360-gpp";
391 o) Marvell Discovery PCI host bridge node
393 Represents the Discovery's PCI host bridge device. The properties
394 for this node conform to Rev 2.1 of the PCI Bus Binding to IEEE
395 1275-1994. A typical value for the compatible property is
396 "marvell,mv64360-pci".
398 Example Discovery PCI host bridge node
400 #address-cells = <3>;
402 #interrupt-cells = <1>;
404 compatible = "marvell,mv64360-pci";
406 ranges = <0x01000000 0x0 0x0
407 0x88000000 0x0 0x01000000
408 0x02000000 0x0 0x80000000
409 0x80000000 0x0 0x08000000>;
411 clock-frequency = <66000000>;
412 interrupt-parent = <&PIC>;
413 interrupt-map-mask = <0xf800 0x0 0x0 0x7>;
442 p) Marvell Discovery CPU Error nodes
444 Represent the Discovery's CPU error handler device.
447 - compatible : "marvell,mv64360-cpu-error"
448 - reg : Offset and length of the register set for this device
449 - interrupts : the interrupt number for this device
450 - interrupt-parent : the phandle for the interrupt controller
451 that services interrupts for this device.
453 Example Discovery CPU Error node:
455 compatible = "marvell,mv64360-cpu-error";
456 reg = <0x70 0x10 0x128 0x28>;
458 interrupt-parent = <&PIC>;
462 q) Marvell Discovery SRAM Controller nodes
464 Represent the Discovery's SRAM controller device.
467 - compatible : "marvell,mv64360-sram-ctrl"
468 - reg : Offset and length of the register set for this device
469 - interrupts : the interrupt number for this device
470 - interrupt-parent : the phandle for the interrupt controller
471 that services interrupts for this device.
473 Example Discovery SRAM Controller node:
475 compatible = "marvell,mv64360-sram-ctrl";
478 interrupt-parent = <&PIC>;
482 r) Marvell Discovery PCI Error Handler nodes
484 Represent the Discovery's PCI error handler device.
487 - compatible : "marvell,mv64360-pci-error"
488 - reg : Offset and length of the register set for this device
489 - interrupts : the interrupt number for this device
490 - interrupt-parent : the phandle for the interrupt controller
491 that services interrupts for this device.
493 Example Discovery PCI Error Handler node:
495 compatible = "marvell,mv64360-pci-error";
496 reg = <0x1d40 0x40 0xc28 0x4>;
498 interrupt-parent = <&PIC>;
502 s) Marvell Discovery Memory Controller nodes
504 Represent the Discovery's memory controller device.
507 - compatible : "marvell,mv64360-mem-ctrl"
508 - reg : Offset and length of the register set for this device
509 - interrupts : the interrupt number for this device
510 - interrupt-parent : the phandle for the interrupt controller
511 that services interrupts for this device.
513 Example Discovery Memory Controller node:
515 compatible = "marvell,mv64360-mem-ctrl";
518 interrupt-parent = <&PIC>;