diff options
author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-06-26 02:58:01 -0400 |
---|---|---|
committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-06-26 02:58:01 -0400 |
commit | fd0cca754f3f6756bfdafe500e4f49b1b9e9723f (patch) | |
tree | b1eb43fb2fb068ed5fc92b031e3ae853e599af9c /Documentation/powerpc/booting-without-of.txt | |
parent | 5ba762c9bb3ce2cc11e9e111cb3c476e84b91668 (diff) | |
parent | 66c6b856d8738278a4a6e558d25c90e9950aa112 (diff) |
Merge commit 'kumar/next' into merge
Diffstat (limited to 'Documentation/powerpc/booting-without-of.txt')
-rw-r--r-- | Documentation/powerpc/booting-without-of.txt | 1168 |
1 files changed, 2 insertions, 1166 deletions
diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt index 8d999d862d0e..79f533f38c61 100644 --- a/Documentation/powerpc/booting-without-of.txt +++ b/Documentation/powerpc/booting-without-of.txt | |||
@@ -1238,1122 +1238,7 @@ descriptions for the SOC devices for which new nodes have been | |||
1238 | defined; this list will expand as more and more SOC-containing | 1238 | defined; this list will expand as more and more SOC-containing |
1239 | platforms are moved over to use the flattened-device-tree model. | 1239 | platforms are moved over to use the flattened-device-tree model. |
1240 | 1240 | ||
1241 | a) PHY nodes | 1241 | VII - Specifying interrupt information for devices |
1242 | |||
1243 | Required properties: | ||
1244 | |||
1245 | - device_type : Should be "ethernet-phy" | ||
1246 | - interrupts : <a b> where a is the interrupt number and b is a | ||
1247 | field that represents an encoding of the sense and level | ||
1248 | information for the interrupt. This should be encoded based on | ||
1249 | the information in section 2) depending on the type of interrupt | ||
1250 | controller you have. | ||
1251 | - interrupt-parent : the phandle for the interrupt controller that | ||
1252 | services interrupts for this device. | ||
1253 | - reg : The ID number for the phy, usually a small integer | ||
1254 | - linux,phandle : phandle for this node; likely referenced by an | ||
1255 | ethernet controller node. | ||
1256 | |||
1257 | |||
1258 | Example: | ||
1259 | |||
1260 | ethernet-phy@0 { | ||
1261 | linux,phandle = <2452000> | ||
1262 | interrupt-parent = <40000>; | ||
1263 | interrupts = <35 1>; | ||
1264 | reg = <0>; | ||
1265 | device_type = "ethernet-phy"; | ||
1266 | }; | ||
1267 | |||
1268 | |||
1269 | b) Interrupt controllers | ||
1270 | |||
1271 | Some SOC devices contain interrupt controllers that are different | ||
1272 | from the standard Open PIC specification. The SOC device nodes for | ||
1273 | these types of controllers should be specified just like a standard | ||
1274 | OpenPIC controller. Sense and level information should be encoded | ||
1275 | as specified in section 2) of this chapter for each device that | ||
1276 | specifies an interrupt. | ||
1277 | |||
1278 | Example : | ||
1279 | |||
1280 | pic@40000 { | ||
1281 | linux,phandle = <40000>; | ||
1282 | interrupt-controller; | ||
1283 | #address-cells = <0>; | ||
1284 | reg = <40000 40000>; | ||
1285 | compatible = "chrp,open-pic"; | ||
1286 | device_type = "open-pic"; | ||
1287 | }; | ||
1288 | |||
1289 | c) 4xx/Axon EMAC ethernet nodes | ||
1290 | |||
1291 | The EMAC ethernet controller in IBM and AMCC 4xx chips, and also | ||
1292 | the Axon bridge. To operate this needs to interact with a ths | ||
1293 | special McMAL DMA controller, and sometimes an RGMII or ZMII | ||
1294 | interface. In addition to the nodes and properties described | ||
1295 | below, the node for the OPB bus on which the EMAC sits must have a | ||
1296 | correct clock-frequency property. | ||
1297 | |||
1298 | i) The EMAC node itself | ||
1299 | |||
1300 | Required properties: | ||
1301 | - device_type : "network" | ||
1302 | |||
1303 | - compatible : compatible list, contains 2 entries, first is | ||
1304 | "ibm,emac-CHIP" where CHIP is the host ASIC (440gx, | ||
1305 | 405gp, Axon) and second is either "ibm,emac" or | ||
1306 | "ibm,emac4". For Axon, thus, we have: "ibm,emac-axon", | ||
1307 | "ibm,emac4" | ||
1308 | - interrupts : <interrupt mapping for EMAC IRQ and WOL IRQ> | ||
1309 | - interrupt-parent : optional, if needed for interrupt mapping | ||
1310 | - reg : <registers mapping> | ||
1311 | - local-mac-address : 6 bytes, MAC address | ||
1312 | - mal-device : phandle of the associated McMAL node | ||
1313 | - mal-tx-channel : 1 cell, index of the tx channel on McMAL associated | ||
1314 | with this EMAC | ||
1315 | - mal-rx-channel : 1 cell, index of the rx channel on McMAL associated | ||
1316 | with this EMAC | ||
1317 | - cell-index : 1 cell, hardware index of the EMAC cell on a given | ||
1318 | ASIC (typically 0x0 and 0x1 for EMAC0 and EMAC1 on | ||
1319 | each Axon chip) | ||
1320 | - max-frame-size : 1 cell, maximum frame size supported in bytes | ||
1321 | - rx-fifo-size : 1 cell, Rx fifo size in bytes for 10 and 100 Mb/sec | ||
1322 | operations. | ||
1323 | For Axon, 2048 | ||
1324 | - tx-fifo-size : 1 cell, Tx fifo size in bytes for 10 and 100 Mb/sec | ||
1325 | operations. | ||
1326 | For Axon, 2048. | ||
1327 | - fifo-entry-size : 1 cell, size of a fifo entry (used to calculate | ||
1328 | thresholds). | ||
1329 | For Axon, 0x00000010 | ||
1330 | - mal-burst-size : 1 cell, MAL burst size (used to calculate thresholds) | ||
1331 | in bytes. | ||
1332 | For Axon, 0x00000100 (I think ...) | ||
1333 | - phy-mode : string, mode of operations of the PHY interface. | ||
1334 | Supported values are: "mii", "rmii", "smii", "rgmii", | ||
1335 | "tbi", "gmii", rtbi", "sgmii". | ||
1336 | For Axon on CAB, it is "rgmii" | ||
1337 | - mdio-device : 1 cell, required iff using shared MDIO registers | ||
1338 | (440EP). phandle of the EMAC to use to drive the | ||
1339 | MDIO lines for the PHY used by this EMAC. | ||
1340 | - zmii-device : 1 cell, required iff connected to a ZMII. phandle of | ||
1341 | the ZMII device node | ||
1342 | - zmii-channel : 1 cell, required iff connected to a ZMII. Which ZMII | ||
1343 | channel or 0xffffffff if ZMII is only used for MDIO. | ||
1344 | - rgmii-device : 1 cell, required iff connected to an RGMII. phandle | ||
1345 | of the RGMII device node. | ||
1346 | For Axon: phandle of plb5/plb4/opb/rgmii | ||
1347 | - rgmii-channel : 1 cell, required iff connected to an RGMII. Which | ||
1348 | RGMII channel is used by this EMAC. | ||
1349 | Fox Axon: present, whatever value is appropriate for each | ||
1350 | EMAC, that is the content of the current (bogus) "phy-port" | ||
1351 | property. | ||
1352 | |||
1353 | Optional properties: | ||
1354 | - phy-address : 1 cell, optional, MDIO address of the PHY. If absent, | ||
1355 | a search is performed. | ||
1356 | - phy-map : 1 cell, optional, bitmap of addresses to probe the PHY | ||
1357 | for, used if phy-address is absent. bit 0x00000001 is | ||
1358 | MDIO address 0. | ||
1359 | For Axon it can be absent, though my current driver | ||
1360 | doesn't handle phy-address yet so for now, keep | ||
1361 | 0x00ffffff in it. | ||
1362 | - rx-fifo-size-gige : 1 cell, Rx fifo size in bytes for 1000 Mb/sec | ||
1363 | operations (if absent the value is the same as | ||
1364 | rx-fifo-size). For Axon, either absent or 2048. | ||
1365 | - tx-fifo-size-gige : 1 cell, Tx fifo size in bytes for 1000 Mb/sec | ||
1366 | operations (if absent the value is the same as | ||
1367 | tx-fifo-size). For Axon, either absent or 2048. | ||
1368 | - tah-device : 1 cell, optional. If connected to a TAH engine for | ||
1369 | offload, phandle of the TAH device node. | ||
1370 | - tah-channel : 1 cell, optional. If appropriate, channel used on the | ||
1371 | TAH engine. | ||
1372 | |||
1373 | Example: | ||
1374 | |||
1375 | EMAC0: ethernet@40000800 { | ||
1376 | device_type = "network"; | ||
1377 | compatible = "ibm,emac-440gp", "ibm,emac"; | ||
1378 | interrupt-parent = <&UIC1>; | ||
1379 | interrupts = <1c 4 1d 4>; | ||
1380 | reg = <40000800 70>; | ||
1381 | local-mac-address = [00 04 AC E3 1B 1E]; | ||
1382 | mal-device = <&MAL0>; | ||
1383 | mal-tx-channel = <0 1>; | ||
1384 | mal-rx-channel = <0>; | ||
1385 | cell-index = <0>; | ||
1386 | max-frame-size = <5dc>; | ||
1387 | rx-fifo-size = <1000>; | ||
1388 | tx-fifo-size = <800>; | ||
1389 | phy-mode = "rmii"; | ||
1390 | phy-map = <00000001>; | ||
1391 | zmii-device = <&ZMII0>; | ||
1392 | zmii-channel = <0>; | ||
1393 | }; | ||
1394 | |||
1395 | ii) McMAL node | ||
1396 | |||
1397 | Required properties: | ||
1398 | - device_type : "dma-controller" | ||
1399 | - compatible : compatible list, containing 2 entries, first is | ||
1400 | "ibm,mcmal-CHIP" where CHIP is the host ASIC (like | ||
1401 | emac) and the second is either "ibm,mcmal" or | ||
1402 | "ibm,mcmal2". | ||
1403 | For Axon, "ibm,mcmal-axon","ibm,mcmal2" | ||
1404 | - interrupts : <interrupt mapping for the MAL interrupts sources: | ||
1405 | 5 sources: tx_eob, rx_eob, serr, txde, rxde>. | ||
1406 | For Axon: This is _different_ from the current | ||
1407 | firmware. We use the "delayed" interrupts for txeob | ||
1408 | and rxeob. Thus we end up with mapping those 5 MPIC | ||
1409 | interrupts, all level positive sensitive: 10, 11, 32, | ||
1410 | 33, 34 (in decimal) | ||
1411 | - dcr-reg : < DCR registers range > | ||
1412 | - dcr-parent : if needed for dcr-reg | ||
1413 | - num-tx-chans : 1 cell, number of Tx channels | ||
1414 | - num-rx-chans : 1 cell, number of Rx channels | ||
1415 | |||
1416 | iii) ZMII node | ||
1417 | |||
1418 | Required properties: | ||
1419 | - compatible : compatible list, containing 2 entries, first is | ||
1420 | "ibm,zmii-CHIP" where CHIP is the host ASIC (like | ||
1421 | EMAC) and the second is "ibm,zmii". | ||
1422 | For Axon, there is no ZMII node. | ||
1423 | - reg : <registers mapping> | ||
1424 | |||
1425 | iv) RGMII node | ||
1426 | |||
1427 | Required properties: | ||
1428 | - compatible : compatible list, containing 2 entries, first is | ||
1429 | "ibm,rgmii-CHIP" where CHIP is the host ASIC (like | ||
1430 | EMAC) and the second is "ibm,rgmii". | ||
1431 | For Axon, "ibm,rgmii-axon","ibm,rgmii" | ||
1432 | - reg : <registers mapping> | ||
1433 | - revision : as provided by the RGMII new version register if | ||
1434 | available. | ||
1435 | For Axon: 0x0000012a | ||
1436 | |||
1437 | d) Xilinx IP cores | ||
1438 | |||
1439 | The Xilinx EDK toolchain ships with a set of IP cores (devices) for use | ||
1440 | in Xilinx Spartan and Virtex FPGAs. The devices cover the whole range | ||
1441 | of standard device types (network, serial, etc.) and miscellaneous | ||
1442 | devices (gpio, LCD, spi, etc). Also, since these devices are | ||
1443 | implemented within the fpga fabric every instance of the device can be | ||
1444 | synthesised with different options that change the behaviour. | ||
1445 | |||
1446 | Each IP-core has a set of parameters which the FPGA designer can use to | ||
1447 | control how the core is synthesized. Historically, the EDK tool would | ||
1448 | extract the device parameters relevant to device drivers and copy them | ||
1449 | into an 'xparameters.h' in the form of #define symbols. This tells the | ||
1450 | device drivers how the IP cores are configured, but it requres the kernel | ||
1451 | to be recompiled every time the FPGA bitstream is resynthesized. | ||
1452 | |||
1453 | The new approach is to export the parameters into the device tree and | ||
1454 | generate a new device tree each time the FPGA bitstream changes. The | ||
1455 | parameters which used to be exported as #defines will now become | ||
1456 | properties of the device node. In general, device nodes for IP-cores | ||
1457 | will take the following form: | ||
1458 | |||
1459 | (name): (generic-name)@(base-address) { | ||
1460 | compatible = "xlnx,(ip-core-name)-(HW_VER)" | ||
1461 | [, (list of compatible devices), ...]; | ||
1462 | reg = <(baseaddr) (size)>; | ||
1463 | interrupt-parent = <&interrupt-controller-phandle>; | ||
1464 | interrupts = < ... >; | ||
1465 | xlnx,(parameter1) = "(string-value)"; | ||
1466 | xlnx,(parameter2) = <(int-value)>; | ||
1467 | }; | ||
1468 | |||
1469 | (generic-name): an open firmware-style name that describes the | ||
1470 | generic class of device. Preferably, this is one word, such | ||
1471 | as 'serial' or 'ethernet'. | ||
1472 | (ip-core-name): the name of the ip block (given after the BEGIN | ||
1473 | directive in system.mhs). Should be in lowercase | ||
1474 | and all underscores '_' converted to dashes '-'. | ||
1475 | (name): is derived from the "PARAMETER INSTANCE" value. | ||
1476 | (parameter#): C_* parameters from system.mhs. The C_ prefix is | ||
1477 | dropped from the parameter name, the name is converted | ||
1478 | to lowercase and all underscore '_' characters are | ||
1479 | converted to dashes '-'. | ||
1480 | (baseaddr): the baseaddr parameter value (often named C_BASEADDR). | ||
1481 | (HW_VER): from the HW_VER parameter. | ||
1482 | (size): the address range size (often C_HIGHADDR - C_BASEADDR + 1). | ||
1483 | |||
1484 | Typically, the compatible list will include the exact IP core version | ||
1485 | followed by an older IP core version which implements the same | ||
1486 | interface or any other device with the same interface. | ||
1487 | |||
1488 | 'reg', 'interrupt-parent' and 'interrupts' are all optional properties. | ||
1489 | |||
1490 | For example, the following block from system.mhs: | ||
1491 | |||
1492 | BEGIN opb_uartlite | ||
1493 | PARAMETER INSTANCE = opb_uartlite_0 | ||
1494 | PARAMETER HW_VER = 1.00.b | ||
1495 | PARAMETER C_BAUDRATE = 115200 | ||
1496 | PARAMETER C_DATA_BITS = 8 | ||
1497 | PARAMETER C_ODD_PARITY = 0 | ||
1498 | PARAMETER C_USE_PARITY = 0 | ||
1499 | PARAMETER C_CLK_FREQ = 50000000 | ||
1500 | PARAMETER C_BASEADDR = 0xEC100000 | ||
1501 | PARAMETER C_HIGHADDR = 0xEC10FFFF | ||
1502 | BUS_INTERFACE SOPB = opb_7 | ||
1503 | PORT OPB_Clk = CLK_50MHz | ||
1504 | PORT Interrupt = opb_uartlite_0_Interrupt | ||
1505 | PORT RX = opb_uartlite_0_RX | ||
1506 | PORT TX = opb_uartlite_0_TX | ||
1507 | PORT OPB_Rst = sys_bus_reset_0 | ||
1508 | END | ||
1509 | |||
1510 | becomes the following device tree node: | ||
1511 | |||
1512 | opb_uartlite_0: serial@ec100000 { | ||
1513 | device_type = "serial"; | ||
1514 | compatible = "xlnx,opb-uartlite-1.00.b"; | ||
1515 | reg = <ec100000 10000>; | ||
1516 | interrupt-parent = <&opb_intc_0>; | ||
1517 | interrupts = <1 0>; // got this from the opb_intc parameters | ||
1518 | current-speed = <d#115200>; // standard serial device prop | ||
1519 | clock-frequency = <d#50000000>; // standard serial device prop | ||
1520 | xlnx,data-bits = <8>; | ||
1521 | xlnx,odd-parity = <0>; | ||
1522 | xlnx,use-parity = <0>; | ||
1523 | }; | ||
1524 | |||
1525 | Some IP cores actually implement 2 or more logical devices. In | ||
1526 | this case, the device should still describe the whole IP core with | ||
1527 | a single node and add a child node for each logical device. The | ||
1528 | ranges property can be used to translate from parent IP-core to the | ||
1529 | registers of each device. In addition, the parent node should be | ||
1530 | compatible with the bus type 'xlnx,compound', and should contain | ||
1531 | #address-cells and #size-cells, as with any other bus. (Note: this | ||
1532 | makes the assumption that both logical devices have the same bus | ||
1533 | binding. If this is not true, then separate nodes should be used | ||
1534 | for each logical device). The 'cell-index' property can be used to | ||
1535 | enumerate logical devices within an IP core. For example, the | ||
1536 | following is the system.mhs entry for the dual ps2 controller found | ||
1537 | on the ml403 reference design. | ||
1538 | |||
1539 | BEGIN opb_ps2_dual_ref | ||
1540 | PARAMETER INSTANCE = opb_ps2_dual_ref_0 | ||
1541 | PARAMETER HW_VER = 1.00.a | ||
1542 | PARAMETER C_BASEADDR = 0xA9000000 | ||
1543 | PARAMETER C_HIGHADDR = 0xA9001FFF | ||
1544 | BUS_INTERFACE SOPB = opb_v20_0 | ||
1545 | PORT Sys_Intr1 = ps2_1_intr | ||
1546 | PORT Sys_Intr2 = ps2_2_intr | ||
1547 | PORT Clkin1 = ps2_clk_rx_1 | ||
1548 | PORT Clkin2 = ps2_clk_rx_2 | ||
1549 | PORT Clkpd1 = ps2_clk_tx_1 | ||
1550 | PORT Clkpd2 = ps2_clk_tx_2 | ||
1551 | PORT Rx1 = ps2_d_rx_1 | ||
1552 | PORT Rx2 = ps2_d_rx_2 | ||
1553 | PORT Txpd1 = ps2_d_tx_1 | ||
1554 | PORT Txpd2 = ps2_d_tx_2 | ||
1555 | END | ||
1556 | |||
1557 | It would result in the following device tree nodes: | ||
1558 | |||
1559 | opb_ps2_dual_ref_0: opb-ps2-dual-ref@a9000000 { | ||
1560 | #address-cells = <1>; | ||
1561 | #size-cells = <1>; | ||
1562 | compatible = "xlnx,compound"; | ||
1563 | ranges = <0 a9000000 2000>; | ||
1564 | // If this device had extra parameters, then they would | ||
1565 | // go here. | ||
1566 | ps2@0 { | ||
1567 | compatible = "xlnx,opb-ps2-dual-ref-1.00.a"; | ||
1568 | reg = <0 40>; | ||
1569 | interrupt-parent = <&opb_intc_0>; | ||
1570 | interrupts = <3 0>; | ||
1571 | cell-index = <0>; | ||
1572 | }; | ||
1573 | ps2@1000 { | ||
1574 | compatible = "xlnx,opb-ps2-dual-ref-1.00.a"; | ||
1575 | reg = <1000 40>; | ||
1576 | interrupt-parent = <&opb_intc_0>; | ||
1577 | interrupts = <3 0>; | ||
1578 | cell-index = <0>; | ||
1579 | }; | ||
1580 | }; | ||
1581 | |||
1582 | Also, the system.mhs file defines bus attachments from the processor | ||
1583 | to the devices. The device tree structure should reflect the bus | ||
1584 | attachments. Again an example; this system.mhs fragment: | ||
1585 | |||
1586 | BEGIN ppc405_virtex4 | ||
1587 | PARAMETER INSTANCE = ppc405_0 | ||
1588 | PARAMETER HW_VER = 1.01.a | ||
1589 | BUS_INTERFACE DPLB = plb_v34_0 | ||
1590 | BUS_INTERFACE IPLB = plb_v34_0 | ||
1591 | END | ||
1592 | |||
1593 | BEGIN opb_intc | ||
1594 | PARAMETER INSTANCE = opb_intc_0 | ||
1595 | PARAMETER HW_VER = 1.00.c | ||
1596 | PARAMETER C_BASEADDR = 0xD1000FC0 | ||
1597 | PARAMETER C_HIGHADDR = 0xD1000FDF | ||
1598 | BUS_INTERFACE SOPB = opb_v20_0 | ||
1599 | END | ||
1600 | |||
1601 | BEGIN opb_uart16550 | ||
1602 | PARAMETER INSTANCE = opb_uart16550_0 | ||
1603 | PARAMETER HW_VER = 1.00.d | ||
1604 | PARAMETER C_BASEADDR = 0xa0000000 | ||
1605 | PARAMETER C_HIGHADDR = 0xa0001FFF | ||
1606 | BUS_INTERFACE SOPB = opb_v20_0 | ||
1607 | END | ||
1608 | |||
1609 | BEGIN plb_v34 | ||
1610 | PARAMETER INSTANCE = plb_v34_0 | ||
1611 | PARAMETER HW_VER = 1.02.a | ||
1612 | END | ||
1613 | |||
1614 | BEGIN plb_bram_if_cntlr | ||
1615 | PARAMETER INSTANCE = plb_bram_if_cntlr_0 | ||
1616 | PARAMETER HW_VER = 1.00.b | ||
1617 | PARAMETER C_BASEADDR = 0xFFFF0000 | ||
1618 | PARAMETER C_HIGHADDR = 0xFFFFFFFF | ||
1619 | BUS_INTERFACE SPLB = plb_v34_0 | ||
1620 | END | ||
1621 | |||
1622 | BEGIN plb2opb_bridge | ||
1623 | PARAMETER INSTANCE = plb2opb_bridge_0 | ||
1624 | PARAMETER HW_VER = 1.01.a | ||
1625 | PARAMETER C_RNG0_BASEADDR = 0x20000000 | ||
1626 | PARAMETER C_RNG0_HIGHADDR = 0x3FFFFFFF | ||
1627 | PARAMETER C_RNG1_BASEADDR = 0x60000000 | ||
1628 | PARAMETER C_RNG1_HIGHADDR = 0x7FFFFFFF | ||
1629 | PARAMETER C_RNG2_BASEADDR = 0x80000000 | ||
1630 | PARAMETER C_RNG2_HIGHADDR = 0xBFFFFFFF | ||
1631 | PARAMETER C_RNG3_BASEADDR = 0xC0000000 | ||
1632 | PARAMETER C_RNG3_HIGHADDR = 0xDFFFFFFF | ||
1633 | BUS_INTERFACE SPLB = plb_v34_0 | ||
1634 | BUS_INTERFACE MOPB = opb_v20_0 | ||
1635 | END | ||
1636 | |||
1637 | Gives this device tree (some properties removed for clarity): | ||
1638 | |||
1639 | plb@0 { | ||
1640 | #address-cells = <1>; | ||
1641 | #size-cells = <1>; | ||
1642 | compatible = "xlnx,plb-v34-1.02.a"; | ||
1643 | device_type = "ibm,plb"; | ||
1644 | ranges; // 1:1 translation | ||
1645 | |||
1646 | plb_bram_if_cntrl_0: bram@ffff0000 { | ||
1647 | reg = <ffff0000 10000>; | ||
1648 | } | ||
1649 | |||
1650 | opb@20000000 { | ||
1651 | #address-cells = <1>; | ||
1652 | #size-cells = <1>; | ||
1653 | ranges = <20000000 20000000 20000000 | ||
1654 | 60000000 60000000 20000000 | ||
1655 | 80000000 80000000 40000000 | ||
1656 | c0000000 c0000000 20000000>; | ||
1657 | |||
1658 | opb_uart16550_0: serial@a0000000 { | ||
1659 | reg = <a00000000 2000>; | ||
1660 | }; | ||
1661 | |||
1662 | opb_intc_0: interrupt-controller@d1000fc0 { | ||
1663 | reg = <d1000fc0 20>; | ||
1664 | }; | ||
1665 | }; | ||
1666 | }; | ||
1667 | |||
1668 | That covers the general approach to binding xilinx IP cores into the | ||
1669 | device tree. The following are bindings for specific devices: | ||
1670 | |||
1671 | i) Xilinx ML300 Framebuffer | ||
1672 | |||
1673 | Simple framebuffer device from the ML300 reference design (also on the | ||
1674 | ML403 reference design as well as others). | ||
1675 | |||
1676 | Optional properties: | ||
1677 | - resolution = <xres yres> : pixel resolution of framebuffer. Some | ||
1678 | implementations use a different resolution. | ||
1679 | Default is <d#640 d#480> | ||
1680 | - virt-resolution = <xvirt yvirt> : Size of framebuffer in memory. | ||
1681 | Default is <d#1024 d#480>. | ||
1682 | - rotate-display (empty) : rotate display 180 degrees. | ||
1683 | |||
1684 | ii) Xilinx SystemACE | ||
1685 | |||
1686 | The Xilinx SystemACE device is used to program FPGAs from an FPGA | ||
1687 | bitstream stored on a CF card. It can also be used as a generic CF | ||
1688 | interface device. | ||
1689 | |||
1690 | Optional properties: | ||
1691 | - 8-bit (empty) : Set this property for SystemACE in 8 bit mode | ||
1692 | |||
1693 | iii) Xilinx EMAC and Xilinx TEMAC | ||
1694 | |||
1695 | Xilinx Ethernet devices. In addition to general xilinx properties | ||
1696 | listed above, nodes for these devices should include a phy-handle | ||
1697 | property, and may include other common network device properties | ||
1698 | like local-mac-address. | ||
1699 | |||
1700 | iv) Xilinx Uartlite | ||
1701 | |||
1702 | Xilinx uartlite devices are simple fixed speed serial ports. | ||
1703 | |||
1704 | Required properties: | ||
1705 | - current-speed : Baud rate of uartlite | ||
1706 | |||
1707 | v) Xilinx hwicap | ||
1708 | |||
1709 | Xilinx hwicap devices provide access to the configuration logic | ||
1710 | of the FPGA through the Internal Configuration Access Port | ||
1711 | (ICAP). The ICAP enables partial reconfiguration of the FPGA, | ||
1712 | readback of the configuration information, and some control over | ||
1713 | 'warm boots' of the FPGA fabric. | ||
1714 | |||
1715 | Required properties: | ||
1716 | - xlnx,family : The family of the FPGA, necessary since the | ||
1717 | capabilities of the underlying ICAP hardware | ||
1718 | differ between different families. May be | ||
1719 | 'virtex2p', 'virtex4', or 'virtex5'. | ||
1720 | |||
1721 | vi) Xilinx Uart 16550 | ||
1722 | |||
1723 | Xilinx UART 16550 devices are very similar to the NS16550 but with | ||
1724 | different register spacing and an offset from the base address. | ||
1725 | |||
1726 | Required properties: | ||
1727 | - clock-frequency : Frequency of the clock input | ||
1728 | - reg-offset : A value of 3 is required | ||
1729 | - reg-shift : A value of 2 is required | ||
1730 | |||
1731 | e) USB EHCI controllers | ||
1732 | |||
1733 | Required properties: | ||
1734 | - compatible : should be "usb-ehci". | ||
1735 | - reg : should contain at least address and length of the standard EHCI | ||
1736 | register set for the device. Optional platform-dependent registers | ||
1737 | (debug-port or other) can be also specified here, but only after | ||
1738 | definition of standard EHCI registers. | ||
1739 | - interrupts : one EHCI interrupt should be described here. | ||
1740 | If device registers are implemented in big endian mode, the device | ||
1741 | node should have "big-endian-regs" property. | ||
1742 | If controller implementation operates with big endian descriptors, | ||
1743 | "big-endian-desc" property should be specified. | ||
1744 | If both big endian registers and descriptors are used by the controller | ||
1745 | implementation, "big-endian" property can be specified instead of having | ||
1746 | both "big-endian-regs" and "big-endian-desc". | ||
1747 | |||
1748 | Example (Sequoia 440EPx): | ||
1749 | ehci@e0000300 { | ||
1750 | compatible = "ibm,usb-ehci-440epx", "usb-ehci"; | ||
1751 | interrupt-parent = <&UIC0>; | ||
1752 | interrupts = <1a 4>; | ||
1753 | reg = <0 e0000300 90 0 e0000390 70>; | ||
1754 | big-endian; | ||
1755 | }; | ||
1756 | |||
1757 | f) MDIO on GPIOs | ||
1758 | |||
1759 | Currently defined compatibles: | ||
1760 | - virtual,gpio-mdio | ||
1761 | |||
1762 | MDC and MDIO lines connected to GPIO controllers are listed in the | ||
1763 | gpios property as described in section VIII.1 in the following order: | ||
1764 | |||
1765 | MDC, MDIO. | ||
1766 | |||
1767 | Example: | ||
1768 | |||
1769 | mdio { | ||
1770 | compatible = "virtual,mdio-gpio"; | ||
1771 | #address-cells = <1>; | ||
1772 | #size-cells = <0>; | ||
1773 | gpios = <&qe_pio_a 11 | ||
1774 | &qe_pio_c 6>; | ||
1775 | }; | ||
1776 | |||
1777 | g) SPI (Serial Peripheral Interface) busses | ||
1778 | |||
1779 | SPI busses can be described with a node for the SPI master device | ||
1780 | and a set of child nodes for each SPI slave on the bus. For this | ||
1781 | discussion, it is assumed that the system's SPI controller is in | ||
1782 | SPI master mode. This binding does not describe SPI controllers | ||
1783 | in slave mode. | ||
1784 | |||
1785 | The SPI master node requires the following properties: | ||
1786 | - #address-cells - number of cells required to define a chip select | ||
1787 | address on the SPI bus. | ||
1788 | - #size-cells - should be zero. | ||
1789 | - compatible - name of SPI bus controller following generic names | ||
1790 | recommended practice. | ||
1791 | No other properties are required in the SPI bus node. It is assumed | ||
1792 | that a driver for an SPI bus device will understand that it is an SPI bus. | ||
1793 | However, the binding does not attempt to define the specific method for | ||
1794 | assigning chip select numbers. Since SPI chip select configuration is | ||
1795 | flexible and non-standardized, it is left out of this binding with the | ||
1796 | assumption that board specific platform code will be used to manage | ||
1797 | chip selects. Individual drivers can define additional properties to | ||
1798 | support describing the chip select layout. | ||
1799 | |||
1800 | SPI slave nodes must be children of the SPI master node and can | ||
1801 | contain the following properties. | ||
1802 | - reg - (required) chip select address of device. | ||
1803 | - compatible - (required) name of SPI device following generic names | ||
1804 | recommended practice | ||
1805 | - spi-max-frequency - (required) Maximum SPI clocking speed of device in Hz | ||
1806 | - spi-cpol - (optional) Empty property indicating device requires | ||
1807 | inverse clock polarity (CPOL) mode | ||
1808 | - spi-cpha - (optional) Empty property indicating device requires | ||
1809 | shifted clock phase (CPHA) mode | ||
1810 | - spi-cs-high - (optional) Empty property indicating device requires | ||
1811 | chip select active high | ||
1812 | |||
1813 | SPI example for an MPC5200 SPI bus: | ||
1814 | spi@f00 { | ||
1815 | #address-cells = <1>; | ||
1816 | #size-cells = <0>; | ||
1817 | compatible = "fsl,mpc5200b-spi","fsl,mpc5200-spi"; | ||
1818 | reg = <0xf00 0x20>; | ||
1819 | interrupts = <2 13 0 2 14 0>; | ||
1820 | interrupt-parent = <&mpc5200_pic>; | ||
1821 | |||
1822 | ethernet-switch@0 { | ||
1823 | compatible = "micrel,ks8995m"; | ||
1824 | spi-max-frequency = <1000000>; | ||
1825 | reg = <0>; | ||
1826 | }; | ||
1827 | |||
1828 | codec@1 { | ||
1829 | compatible = "ti,tlv320aic26"; | ||
1830 | spi-max-frequency = <100000>; | ||
1831 | reg = <1>; | ||
1832 | }; | ||
1833 | }; | ||
1834 | |||
1835 | VII - Marvell Discovery mv64[345]6x System Controller chips | ||
1836 | =========================================================== | ||
1837 | |||
1838 | The Marvell mv64[345]60 series of system controller chips contain | ||
1839 | many of the peripherals needed to implement a complete computer | ||
1840 | system. In this section, we define device tree nodes to describe | ||
1841 | the system controller chip itself and each of the peripherals | ||
1842 | which it contains. Compatible string values for each node are | ||
1843 | prefixed with the string "marvell,", for Marvell Technology Group Ltd. | ||
1844 | |||
1845 | 1) The /system-controller node | ||
1846 | |||
1847 | This node is used to represent the system-controller and must be | ||
1848 | present when the system uses a system controller chip. The top-level | ||
1849 | system-controller node contains information that is global to all | ||
1850 | devices within the system controller chip. The node name begins | ||
1851 | with "system-controller" followed by the unit address, which is | ||
1852 | the base address of the memory-mapped register set for the system | ||
1853 | controller chip. | ||
1854 | |||
1855 | Required properties: | ||
1856 | |||
1857 | - ranges : Describes the translation of system controller addresses | ||
1858 | for memory mapped registers. | ||
1859 | - clock-frequency: Contains the main clock frequency for the system | ||
1860 | controller chip. | ||
1861 | - reg : This property defines the address and size of the | ||
1862 | memory-mapped registers contained within the system controller | ||
1863 | chip. The address specified in the "reg" property should match | ||
1864 | the unit address of the system-controller node. | ||
1865 | - #address-cells : Address representation for system controller | ||
1866 | devices. This field represents the number of cells needed to | ||
1867 | represent the address of the memory-mapped registers of devices | ||
1868 | within the system controller chip. | ||
1869 | - #size-cells : Size representation for for the memory-mapped | ||
1870 | registers within the system controller chip. | ||
1871 | - #interrupt-cells : Defines the width of cells used to represent | ||
1872 | interrupts. | ||
1873 | |||
1874 | Optional properties: | ||
1875 | |||
1876 | - model : The specific model of the system controller chip. Such | ||
1877 | as, "mv64360", "mv64460", or "mv64560". | ||
1878 | - compatible : A string identifying the compatibility identifiers | ||
1879 | of the system controller chip. | ||
1880 | |||
1881 | The system-controller node contains child nodes for each system | ||
1882 | controller device that the platform uses. Nodes should not be created | ||
1883 | for devices which exist on the system controller chip but are not used | ||
1884 | |||
1885 | Example Marvell Discovery mv64360 system-controller node: | ||
1886 | |||
1887 | system-controller@f1000000 { /* Marvell Discovery mv64360 */ | ||
1888 | #address-cells = <1>; | ||
1889 | #size-cells = <1>; | ||
1890 | model = "mv64360"; /* Default */ | ||
1891 | compatible = "marvell,mv64360"; | ||
1892 | clock-frequency = <133333333>; | ||
1893 | reg = <0xf1000000 0x10000>; | ||
1894 | virtual-reg = <0xf1000000>; | ||
1895 | ranges = <0x88000000 0x88000000 0x1000000 /* PCI 0 I/O Space */ | ||
1896 | 0x80000000 0x80000000 0x8000000 /* PCI 0 MEM Space */ | ||
1897 | 0xa0000000 0xa0000000 0x4000000 /* User FLASH */ | ||
1898 | 0x00000000 0xf1000000 0x0010000 /* Bridge's regs */ | ||
1899 | 0xf2000000 0xf2000000 0x0040000>;/* Integrated SRAM */ | ||
1900 | |||
1901 | [ child node definitions... ] | ||
1902 | } | ||
1903 | |||
1904 | 2) Child nodes of /system-controller | ||
1905 | |||
1906 | a) Marvell Discovery MDIO bus | ||
1907 | |||
1908 | The MDIO is a bus to which the PHY devices are connected. For each | ||
1909 | device that exists on this bus, a child node should be created. See | ||
1910 | the definition of the PHY node below for an example of how to define | ||
1911 | a PHY. | ||
1912 | |||
1913 | Required properties: | ||
1914 | - #address-cells : Should be <1> | ||
1915 | - #size-cells : Should be <0> | ||
1916 | - device_type : Should be "mdio" | ||
1917 | - compatible : Should be "marvell,mv64360-mdio" | ||
1918 | |||
1919 | Example: | ||
1920 | |||
1921 | mdio { | ||
1922 | #address-cells = <1>; | ||
1923 | #size-cells = <0>; | ||
1924 | device_type = "mdio"; | ||
1925 | compatible = "marvell,mv64360-mdio"; | ||
1926 | |||
1927 | ethernet-phy@0 { | ||
1928 | ...... | ||
1929 | }; | ||
1930 | }; | ||
1931 | |||
1932 | |||
1933 | b) Marvell Discovery ethernet controller | ||
1934 | |||
1935 | The Discover ethernet controller is described with two levels | ||
1936 | of nodes. The first level describes an ethernet silicon block | ||
1937 | and the second level describes up to 3 ethernet nodes within | ||
1938 | that block. The reason for the multiple levels is that the | ||
1939 | registers for the node are interleaved within a single set | ||
1940 | of registers. The "ethernet-block" level describes the | ||
1941 | shared register set, and the "ethernet" nodes describe ethernet | ||
1942 | port-specific properties. | ||
1943 | |||
1944 | Ethernet block node | ||
1945 | |||
1946 | Required properties: | ||
1947 | - #address-cells : <1> | ||
1948 | - #size-cells : <0> | ||
1949 | - compatible : "marvell,mv64360-eth-block" | ||
1950 | - reg : Offset and length of the register set for this block | ||
1951 | |||
1952 | Example Discovery Ethernet block node: | ||
1953 | ethernet-block@2000 { | ||
1954 | #address-cells = <1>; | ||
1955 | #size-cells = <0>; | ||
1956 | compatible = "marvell,mv64360-eth-block"; | ||
1957 | reg = <0x2000 0x2000>; | ||
1958 | ethernet@0 { | ||
1959 | ....... | ||
1960 | }; | ||
1961 | }; | ||
1962 | |||
1963 | Ethernet port node | ||
1964 | |||
1965 | Required properties: | ||
1966 | - device_type : Should be "network". | ||
1967 | - compatible : Should be "marvell,mv64360-eth". | ||
1968 | - reg : Should be <0>, <1>, or <2>, according to which registers | ||
1969 | within the silicon block the device uses. | ||
1970 | - interrupts : <a> where a is the interrupt number for the port. | ||
1971 | - interrupt-parent : the phandle for the interrupt controller | ||
1972 | that services interrupts for this device. | ||
1973 | - phy : the phandle for the PHY connected to this ethernet | ||
1974 | controller. | ||
1975 | - local-mac-address : 6 bytes, MAC address | ||
1976 | |||
1977 | Example Discovery Ethernet port node: | ||
1978 | ethernet@0 { | ||
1979 | device_type = "network"; | ||
1980 | compatible = "marvell,mv64360-eth"; | ||
1981 | reg = <0>; | ||
1982 | interrupts = <32>; | ||
1983 | interrupt-parent = <&PIC>; | ||
1984 | phy = <&PHY0>; | ||
1985 | local-mac-address = [ 00 00 00 00 00 00 ]; | ||
1986 | }; | ||
1987 | |||
1988 | |||
1989 | |||
1990 | c) Marvell Discovery PHY nodes | ||
1991 | |||
1992 | Required properties: | ||
1993 | - device_type : Should be "ethernet-phy" | ||
1994 | - interrupts : <a> where a is the interrupt number for this phy. | ||
1995 | - interrupt-parent : the phandle for the interrupt controller that | ||
1996 | services interrupts for this device. | ||
1997 | - reg : The ID number for the phy, usually a small integer | ||
1998 | |||
1999 | Example Discovery PHY node: | ||
2000 | ethernet-phy@1 { | ||
2001 | device_type = "ethernet-phy"; | ||
2002 | compatible = "broadcom,bcm5421"; | ||
2003 | interrupts = <76>; /* GPP 12 */ | ||
2004 | interrupt-parent = <&PIC>; | ||
2005 | reg = <1>; | ||
2006 | }; | ||
2007 | |||
2008 | |||
2009 | d) Marvell Discovery SDMA nodes | ||
2010 | |||
2011 | Represent DMA hardware associated with the MPSC (multiprotocol | ||
2012 | serial controllers). | ||
2013 | |||
2014 | Required properties: | ||
2015 | - compatible : "marvell,mv64360-sdma" | ||
2016 | - reg : Offset and length of the register set for this device | ||
2017 | - interrupts : <a> where a is the interrupt number for the DMA | ||
2018 | device. | ||
2019 | - interrupt-parent : the phandle for the interrupt controller | ||
2020 | that services interrupts for this device. | ||
2021 | |||
2022 | Example Discovery SDMA node: | ||
2023 | sdma@4000 { | ||
2024 | compatible = "marvell,mv64360-sdma"; | ||
2025 | reg = <0x4000 0xc18>; | ||
2026 | virtual-reg = <0xf1004000>; | ||
2027 | interrupts = <36>; | ||
2028 | interrupt-parent = <&PIC>; | ||
2029 | }; | ||
2030 | |||
2031 | |||
2032 | e) Marvell Discovery BRG nodes | ||
2033 | |||
2034 | Represent baud rate generator hardware associated with the MPSC | ||
2035 | (multiprotocol serial controllers). | ||
2036 | |||
2037 | Required properties: | ||
2038 | - compatible : "marvell,mv64360-brg" | ||
2039 | - reg : Offset and length of the register set for this device | ||
2040 | - clock-src : A value from 0 to 15 which selects the clock | ||
2041 | source for the baud rate generator. This value corresponds | ||
2042 | to the CLKS value in the BRGx configuration register. See | ||
2043 | the mv64x60 User's Manual. | ||
2044 | - clock-frequence : The frequency (in Hz) of the baud rate | ||
2045 | generator's input clock. | ||
2046 | - current-speed : The current speed setting (presumably by | ||
2047 | firmware) of the baud rate generator. | ||
2048 | |||
2049 | Example Discovery BRG node: | ||
2050 | brg@b200 { | ||
2051 | compatible = "marvell,mv64360-brg"; | ||
2052 | reg = <0xb200 0x8>; | ||
2053 | clock-src = <8>; | ||
2054 | clock-frequency = <133333333>; | ||
2055 | current-speed = <9600>; | ||
2056 | }; | ||
2057 | |||
2058 | |||
2059 | f) Marvell Discovery CUNIT nodes | ||
2060 | |||
2061 | Represent the Serial Communications Unit device hardware. | ||
2062 | |||
2063 | Required properties: | ||
2064 | - reg : Offset and length of the register set for this device | ||
2065 | |||
2066 | Example Discovery CUNIT node: | ||
2067 | cunit@f200 { | ||
2068 | reg = <0xf200 0x200>; | ||
2069 | }; | ||
2070 | |||
2071 | |||
2072 | g) Marvell Discovery MPSCROUTING nodes | ||
2073 | |||
2074 | Represent the Discovery's MPSC routing hardware | ||
2075 | |||
2076 | Required properties: | ||
2077 | - reg : Offset and length of the register set for this device | ||
2078 | |||
2079 | Example Discovery CUNIT node: | ||
2080 | mpscrouting@b500 { | ||
2081 | reg = <0xb400 0xc>; | ||
2082 | }; | ||
2083 | |||
2084 | |||
2085 | h) Marvell Discovery MPSCINTR nodes | ||
2086 | |||
2087 | Represent the Discovery's MPSC DMA interrupt hardware registers | ||
2088 | (SDMA cause and mask registers). | ||
2089 | |||
2090 | Required properties: | ||
2091 | - reg : Offset and length of the register set for this device | ||
2092 | |||
2093 | Example Discovery MPSCINTR node: | ||
2094 | mpsintr@b800 { | ||
2095 | reg = <0xb800 0x100>; | ||
2096 | }; | ||
2097 | |||
2098 | |||
2099 | i) Marvell Discovery MPSC nodes | ||
2100 | |||
2101 | Represent the Discovery's MPSC (Multiprotocol Serial Controller) | ||
2102 | serial port. | ||
2103 | |||
2104 | Required properties: | ||
2105 | - device_type : "serial" | ||
2106 | - compatible : "marvell,mv64360-mpsc" | ||
2107 | - reg : Offset and length of the register set for this device | ||
2108 | - sdma : the phandle for the SDMA node used by this port | ||
2109 | - brg : the phandle for the BRG node used by this port | ||
2110 | - cunit : the phandle for the CUNIT node used by this port | ||
2111 | - mpscrouting : the phandle for the MPSCROUTING node used by this port | ||
2112 | - mpscintr : the phandle for the MPSCINTR node used by this port | ||
2113 | - cell-index : the hardware index of this cell in the MPSC core | ||
2114 | - max_idle : value needed for MPSC CHR3 (Maximum Frame Length) | ||
2115 | register | ||
2116 | - interrupts : <a> where a is the interrupt number for the MPSC. | ||
2117 | - interrupt-parent : the phandle for the interrupt controller | ||
2118 | that services interrupts for this device. | ||
2119 | |||
2120 | Example Discovery MPSCINTR node: | ||
2121 | mpsc@8000 { | ||
2122 | device_type = "serial"; | ||
2123 | compatible = "marvell,mv64360-mpsc"; | ||
2124 | reg = <0x8000 0x38>; | ||
2125 | virtual-reg = <0xf1008000>; | ||
2126 | sdma = <&SDMA0>; | ||
2127 | brg = <&BRG0>; | ||
2128 | cunit = <&CUNIT>; | ||
2129 | mpscrouting = <&MPSCROUTING>; | ||
2130 | mpscintr = <&MPSCINTR>; | ||
2131 | cell-index = <0>; | ||
2132 | max_idle = <40>; | ||
2133 | interrupts = <40>; | ||
2134 | interrupt-parent = <&PIC>; | ||
2135 | }; | ||
2136 | |||
2137 | |||
2138 | j) Marvell Discovery Watch Dog Timer nodes | ||
2139 | |||
2140 | Represent the Discovery's watchdog timer hardware | ||
2141 | |||
2142 | Required properties: | ||
2143 | - compatible : "marvell,mv64360-wdt" | ||
2144 | - reg : Offset and length of the register set for this device | ||
2145 | |||
2146 | Example Discovery Watch Dog Timer node: | ||
2147 | wdt@b410 { | ||
2148 | compatible = "marvell,mv64360-wdt"; | ||
2149 | reg = <0xb410 0x8>; | ||
2150 | }; | ||
2151 | |||
2152 | |||
2153 | k) Marvell Discovery I2C nodes | ||
2154 | |||
2155 | Represent the Discovery's I2C hardware | ||
2156 | |||
2157 | Required properties: | ||
2158 | - device_type : "i2c" | ||
2159 | - compatible : "marvell,mv64360-i2c" | ||
2160 | - reg : Offset and length of the register set for this device | ||
2161 | - interrupts : <a> where a is the interrupt number for the I2C. | ||
2162 | - interrupt-parent : the phandle for the interrupt controller | ||
2163 | that services interrupts for this device. | ||
2164 | |||
2165 | Example Discovery I2C node: | ||
2166 | compatible = "marvell,mv64360-i2c"; | ||
2167 | reg = <0xc000 0x20>; | ||
2168 | virtual-reg = <0xf100c000>; | ||
2169 | interrupts = <37>; | ||
2170 | interrupt-parent = <&PIC>; | ||
2171 | }; | ||
2172 | |||
2173 | |||
2174 | l) Marvell Discovery PIC (Programmable Interrupt Controller) nodes | ||
2175 | |||
2176 | Represent the Discovery's PIC hardware | ||
2177 | |||
2178 | Required properties: | ||
2179 | - #interrupt-cells : <1> | ||
2180 | - #address-cells : <0> | ||
2181 | - compatible : "marvell,mv64360-pic" | ||
2182 | - reg : Offset and length of the register set for this device | ||
2183 | - interrupt-controller | ||
2184 | |||
2185 | Example Discovery PIC node: | ||
2186 | pic { | ||
2187 | #interrupt-cells = <1>; | ||
2188 | #address-cells = <0>; | ||
2189 | compatible = "marvell,mv64360-pic"; | ||
2190 | reg = <0x0 0x88>; | ||
2191 | interrupt-controller; | ||
2192 | }; | ||
2193 | |||
2194 | |||
2195 | m) Marvell Discovery MPP (Multipurpose Pins) multiplexing nodes | ||
2196 | |||
2197 | Represent the Discovery's MPP hardware | ||
2198 | |||
2199 | Required properties: | ||
2200 | - compatible : "marvell,mv64360-mpp" | ||
2201 | - reg : Offset and length of the register set for this device | ||
2202 | |||
2203 | Example Discovery MPP node: | ||
2204 | mpp@f000 { | ||
2205 | compatible = "marvell,mv64360-mpp"; | ||
2206 | reg = <0xf000 0x10>; | ||
2207 | }; | ||
2208 | |||
2209 | |||
2210 | n) Marvell Discovery GPP (General Purpose Pins) nodes | ||
2211 | |||
2212 | Represent the Discovery's GPP hardware | ||
2213 | |||
2214 | Required properties: | ||
2215 | - compatible : "marvell,mv64360-gpp" | ||
2216 | - reg : Offset and length of the register set for this device | ||
2217 | |||
2218 | Example Discovery GPP node: | ||
2219 | gpp@f000 { | ||
2220 | compatible = "marvell,mv64360-gpp"; | ||
2221 | reg = <0xf100 0x20>; | ||
2222 | }; | ||
2223 | |||
2224 | |||
2225 | o) Marvell Discovery PCI host bridge node | ||
2226 | |||
2227 | Represents the Discovery's PCI host bridge device. The properties | ||
2228 | for this node conform to Rev 2.1 of the PCI Bus Binding to IEEE | ||
2229 | 1275-1994. A typical value for the compatible property is | ||
2230 | "marvell,mv64360-pci". | ||
2231 | |||
2232 | Example Discovery PCI host bridge node | ||
2233 | pci@80000000 { | ||
2234 | #address-cells = <3>; | ||
2235 | #size-cells = <2>; | ||
2236 | #interrupt-cells = <1>; | ||
2237 | device_type = "pci"; | ||
2238 | compatible = "marvell,mv64360-pci"; | ||
2239 | reg = <0xcf8 0x8>; | ||
2240 | ranges = <0x01000000 0x0 0x0 | ||
2241 | 0x88000000 0x0 0x01000000 | ||
2242 | 0x02000000 0x0 0x80000000 | ||
2243 | 0x80000000 0x0 0x08000000>; | ||
2244 | bus-range = <0 255>; | ||
2245 | clock-frequency = <66000000>; | ||
2246 | interrupt-parent = <&PIC>; | ||
2247 | interrupt-map-mask = <0xf800 0x0 0x0 0x7>; | ||
2248 | interrupt-map = < | ||
2249 | /* IDSEL 0x0a */ | ||
2250 | 0x5000 0 0 1 &PIC 80 | ||
2251 | 0x5000 0 0 2 &PIC 81 | ||
2252 | 0x5000 0 0 3 &PIC 91 | ||
2253 | 0x5000 0 0 4 &PIC 93 | ||
2254 | |||
2255 | /* IDSEL 0x0b */ | ||
2256 | 0x5800 0 0 1 &PIC 91 | ||
2257 | 0x5800 0 0 2 &PIC 93 | ||
2258 | 0x5800 0 0 3 &PIC 80 | ||
2259 | 0x5800 0 0 4 &PIC 81 | ||
2260 | |||
2261 | /* IDSEL 0x0c */ | ||
2262 | 0x6000 0 0 1 &PIC 91 | ||
2263 | 0x6000 0 0 2 &PIC 93 | ||
2264 | 0x6000 0 0 3 &PIC 80 | ||
2265 | 0x6000 0 0 4 &PIC 81 | ||
2266 | |||
2267 | /* IDSEL 0x0d */ | ||
2268 | 0x6800 0 0 1 &PIC 93 | ||
2269 | 0x6800 0 0 2 &PIC 80 | ||
2270 | 0x6800 0 0 3 &PIC 81 | ||
2271 | 0x6800 0 0 4 &PIC 91 | ||
2272 | >; | ||
2273 | }; | ||
2274 | |||
2275 | |||
2276 | p) Marvell Discovery CPU Error nodes | ||
2277 | |||
2278 | Represent the Discovery's CPU error handler device. | ||
2279 | |||
2280 | Required properties: | ||
2281 | - compatible : "marvell,mv64360-cpu-error" | ||
2282 | - reg : Offset and length of the register set for this device | ||
2283 | - interrupts : the interrupt number for this device | ||
2284 | - interrupt-parent : the phandle for the interrupt controller | ||
2285 | that services interrupts for this device. | ||
2286 | |||
2287 | Example Discovery CPU Error node: | ||
2288 | cpu-error@0070 { | ||
2289 | compatible = "marvell,mv64360-cpu-error"; | ||
2290 | reg = <0x70 0x10 0x128 0x28>; | ||
2291 | interrupts = <3>; | ||
2292 | interrupt-parent = <&PIC>; | ||
2293 | }; | ||
2294 | |||
2295 | |||
2296 | q) Marvell Discovery SRAM Controller nodes | ||
2297 | |||
2298 | Represent the Discovery's SRAM controller device. | ||
2299 | |||
2300 | Required properties: | ||
2301 | - compatible : "marvell,mv64360-sram-ctrl" | ||
2302 | - reg : Offset and length of the register set for this device | ||
2303 | - interrupts : the interrupt number for this device | ||
2304 | - interrupt-parent : the phandle for the interrupt controller | ||
2305 | that services interrupts for this device. | ||
2306 | |||
2307 | Example Discovery SRAM Controller node: | ||
2308 | sram-ctrl@0380 { | ||
2309 | compatible = "marvell,mv64360-sram-ctrl"; | ||
2310 | reg = <0x380 0x80>; | ||
2311 | interrupts = <13>; | ||
2312 | interrupt-parent = <&PIC>; | ||
2313 | }; | ||
2314 | |||
2315 | |||
2316 | r) Marvell Discovery PCI Error Handler nodes | ||
2317 | |||
2318 | Represent the Discovery's PCI error handler device. | ||
2319 | |||
2320 | Required properties: | ||
2321 | - compatible : "marvell,mv64360-pci-error" | ||
2322 | - reg : Offset and length of the register set for this device | ||
2323 | - interrupts : the interrupt number for this device | ||
2324 | - interrupt-parent : the phandle for the interrupt controller | ||
2325 | that services interrupts for this device. | ||
2326 | |||
2327 | Example Discovery PCI Error Handler node: | ||
2328 | pci-error@1d40 { | ||
2329 | compatible = "marvell,mv64360-pci-error"; | ||
2330 | reg = <0x1d40 0x40 0xc28 0x4>; | ||
2331 | interrupts = <12>; | ||
2332 | interrupt-parent = <&PIC>; | ||
2333 | }; | ||
2334 | |||
2335 | |||
2336 | s) Marvell Discovery Memory Controller nodes | ||
2337 | |||
2338 | Represent the Discovery's memory controller device. | ||
2339 | |||
2340 | Required properties: | ||
2341 | - compatible : "marvell,mv64360-mem-ctrl" | ||
2342 | - reg : Offset and length of the register set for this device | ||
2343 | - interrupts : the interrupt number for this device | ||
2344 | - interrupt-parent : the phandle for the interrupt controller | ||
2345 | that services interrupts for this device. | ||
2346 | |||
2347 | Example Discovery Memory Controller node: | ||
2348 | mem-ctrl@1400 { | ||
2349 | compatible = "marvell,mv64360-mem-ctrl"; | ||
2350 | reg = <0x1400 0x60>; | ||
2351 | interrupts = <17>; | ||
2352 | interrupt-parent = <&PIC>; | ||
2353 | }; | ||
2354 | |||
2355 | |||
2356 | VIII - Specifying interrupt information for devices | ||
2357 | =================================================== | 1242 | =================================================== |
2358 | 1243 | ||
2359 | The device tree represents the busses and devices of a hardware | 1244 | The device tree represents the busses and devices of a hardware |
@@ -2439,56 +1324,7 @@ encodings listed below: | |||
2439 | 2 = high to low edge sensitive type enabled | 1324 | 2 = high to low edge sensitive type enabled |
2440 | 3 = low to high edge sensitive type enabled | 1325 | 3 = low to high edge sensitive type enabled |
2441 | 1326 | ||
2442 | IX - Specifying GPIO information for devices | 1327 | VIII - Specifying Device Power Management Information (sleep property) |
2443 | ============================================ | ||
2444 | |||
2445 | 1) gpios property | ||
2446 | ----------------- | ||
2447 | |||
2448 | Nodes that makes use of GPIOs should define them using `gpios' property, | ||
2449 | format of which is: <&gpio-controller1-phandle gpio1-specifier | ||
2450 | &gpio-controller2-phandle gpio2-specifier | ||
2451 | 0 /* holes are permitted, means no GPIO 3 */ | ||
2452 | &gpio-controller4-phandle gpio4-specifier | ||
2453 | ...>; | ||
2454 | |||
2455 | Note that gpio-specifier length is controller dependent. | ||
2456 | |||
2457 | gpio-specifier may encode: bank, pin position inside the bank, | ||
2458 | whether pin is open-drain and whether pin is logically inverted. | ||
2459 | |||
2460 | Example of the node using GPIOs: | ||
2461 | |||
2462 | node { | ||
2463 | gpios = <&qe_pio_e 18 0>; | ||
2464 | }; | ||
2465 | |||
2466 | In this example gpio-specifier is "18 0" and encodes GPIO pin number, | ||
2467 | and empty GPIO flags as accepted by the "qe_pio_e" gpio-controller. | ||
2468 | |||
2469 | 2) gpio-controller nodes | ||
2470 | ------------------------ | ||
2471 | |||
2472 | Every GPIO controller node must have #gpio-cells property defined, | ||
2473 | this information will be used to translate gpio-specifiers. | ||
2474 | |||
2475 | Example of two SOC GPIO banks defined as gpio-controller nodes: | ||
2476 | |||
2477 | qe_pio_a: gpio-controller@1400 { | ||
2478 | #gpio-cells = <2>; | ||
2479 | compatible = "fsl,qe-pario-bank-a", "fsl,qe-pario-bank"; | ||
2480 | reg = <0x1400 0x18>; | ||
2481 | gpio-controller; | ||
2482 | }; | ||
2483 | |||
2484 | qe_pio_e: gpio-controller@1460 { | ||
2485 | #gpio-cells = <2>; | ||
2486 | compatible = "fsl,qe-pario-bank-e", "fsl,qe-pario-bank"; | ||
2487 | reg = <0x1460 0x18>; | ||
2488 | gpio-controller; | ||
2489 | }; | ||
2490 | |||
2491 | X - Specifying Device Power Management Information (sleep property) | ||
2492 | =================================================================== | 1328 | =================================================================== |
2493 | 1329 | ||
2494 | Devices on SOCs often have mechanisms for placing devices into low-power | 1330 | Devices on SOCs often have mechanisms for placing devices into low-power |