22258fa40e
This patch extends the Ebony and Walnut platform code to instantiate the existing ds1742 RTC class driver for the DS1743 RTC/NVRAM chip found on both those boards. The patch uses a helper function to scan the device tree and instantiate the appropriate platform_device based on it, so it should be easy to extend for other boards which have mmio mapped RTC chips. Along with this, the device tree binding for the ds1743 chips is tweaked, based on the existing DS1385 OF binding found at: http://playground.sun.com/1275/proposals/Closed/Remanded/Accepted/346-it.txt Although that document covers the NVRAM portion of the chip, whereas here we're interested in the RTC portion, so it's not entirely clear if that's a good model. This implements only RTC class driver support - that is /dev/rtc0, not /dev/rtc, and the low-level get/set time callbacks remain unimplemented. That means in order to get at the clock you will either need a modified version of hwclock which will look at /dev/rtc0, or you'll need to configure udev to symlink rtc0 to rtc. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
245 lines
5.3 KiB
Text
245 lines
5.3 KiB
Text
/*
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* Device Tree Source for IBM Walnut
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*
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* Copyright 2007 IBM Corp.
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* Josh Boyer <jwboyer@linux.vnet.ibm.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without
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* any warranty of any kind, whether express or implied.
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*/
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/ {
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#address-cells = <1>;
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#size-cells = <1>;
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model = "ibm,walnut";
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compatible = "ibm,walnut";
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dcr-parent = <&/cpus/cpu@0>;
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aliases {
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ethernet0 = &EMAC;
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serial0 = &UART0;
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serial1 = &UART1;
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};
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cpus {
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#address-cells = <1>;
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#size-cells = <0>;
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cpu@0 {
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device_type = "cpu";
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model = "PowerPC,405GP";
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reg = <0>;
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clock-frequency = <bebc200>; /* Filled in by zImage */
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timebase-frequency = <0>; /* Filled in by zImage */
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i-cache-line-size = <20>;
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d-cache-line-size = <20>;
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i-cache-size = <4000>;
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d-cache-size = <4000>;
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dcr-controller;
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dcr-access-method = "native";
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};
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};
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memory {
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device_type = "memory";
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reg = <0 0>; /* Filled in by zImage */
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};
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UIC0: interrupt-controller {
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compatible = "ibm,uic";
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interrupt-controller;
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cell-index = <0>;
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dcr-reg = <0c0 9>;
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#address-cells = <0>;
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#size-cells = <0>;
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#interrupt-cells = <2>;
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};
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plb {
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compatible = "ibm,plb3";
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#address-cells = <1>;
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#size-cells = <1>;
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ranges;
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clock-frequency = <0>; /* Filled in by zImage */
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SDRAM0: memory-controller {
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compatible = "ibm,sdram-405gp";
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dcr-reg = <010 2>;
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};
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MAL: mcmal {
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compatible = "ibm,mcmal-405gp", "ibm,mcmal";
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dcr-reg = <180 62>;
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num-tx-chans = <1>;
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num-rx-chans = <1>;
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interrupt-parent = <&UIC0>;
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interrupts = <
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b 4 /* TXEOB */
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c 4 /* RXEOB */
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a 4 /* SERR */
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d 4 /* TXDE */
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e 4 /* RXDE */>;
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};
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POB0: opb {
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compatible = "ibm,opb-405gp", "ibm,opb";
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#address-cells = <1>;
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#size-cells = <1>;
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ranges = <ef600000 ef600000 a00000>;
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dcr-reg = <0a0 5>;
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clock-frequency = <0>; /* Filled in by zImage */
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UART0: serial@ef600300 {
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device_type = "serial";
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compatible = "ns16550";
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reg = <ef600300 8>;
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virtual-reg = <ef600300>;
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clock-frequency = <0>; /* Filled in by zImage */
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current-speed = <2580>;
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interrupt-parent = <&UIC0>;
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interrupts = <0 4>;
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};
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UART1: serial@ef600400 {
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device_type = "serial";
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compatible = "ns16550";
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reg = <ef600400 8>;
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virtual-reg = <ef600400>;
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clock-frequency = <0>; /* Filled in by zImage */
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current-speed = <2580>;
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interrupt-parent = <&UIC0>;
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interrupts = <1 4>;
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};
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IIC: i2c@ef600500 {
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compatible = "ibm,iic-405gp", "ibm,iic";
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reg = <ef600500 11>;
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interrupt-parent = <&UIC0>;
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interrupts = <2 4>;
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};
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GPIO: gpio@ef600700 {
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compatible = "ibm,gpio-405gp";
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reg = <ef600700 20>;
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};
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EMAC: ethernet@ef600800 {
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linux,network-index = <0>;
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device_type = "network";
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compatible = "ibm,emac-405gp", "ibm,emac";
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interrupt-parent = <&UIC0>;
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interrupts = <
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f 4 /* Ethernet */
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9 4 /* Ethernet Wake Up */>;
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local-mac-address = [000000000000]; /* Filled in by zImage */
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reg = <ef600800 70>;
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mal-device = <&MAL>;
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mal-tx-channel = <0>;
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mal-rx-channel = <0>;
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cell-index = <0>;
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max-frame-size = <5dc>;
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rx-fifo-size = <1000>;
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tx-fifo-size = <800>;
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phy-mode = "rmii";
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phy-map = <00000001>;
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};
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};
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EBC0: ebc {
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compatible = "ibm,ebc-405gp", "ibm,ebc";
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dcr-reg = <012 2>;
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#address-cells = <2>;
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#size-cells = <1>;
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/* The ranges property is supplied by the bootwrapper
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* and is based on the firmware's configuration of the
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* EBC bridge
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*/
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clock-frequency = <0>; /* Filled in by zImage */
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sram@0,0 {
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reg = <0 0 80000>;
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};
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flash@0,80000 {
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compatible = "jedec-flash";
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bank-width = <1>;
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reg = <0 80000 80000>;
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#address-cells = <1>;
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#size-cells = <1>;
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partition@0 {
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label = "OpenBIOS";
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reg = <0 80000>;
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read-only;
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};
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};
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nvram@1,0 {
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/* NVRAM and RTC */
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compatible = "ds1743-nvram";
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#bytes = <2000>;
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reg = <1 0 2000>;
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};
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keyboard@2,0 {
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compatible = "intel,82C42PC";
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reg = <2 0 2>;
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};
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ir@3,0 {
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compatible = "ti,TIR2000PAG";
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reg = <3 0 10>;
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};
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fpga@7,0 {
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compatible = "Walnut-FPGA";
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reg = <7 0 10>;
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virtual-reg = <f0300005>;
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};
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};
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PCI0: pci@ec000000 {
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device_type = "pci";
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#interrupt-cells = <1>;
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#size-cells = <2>;
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#address-cells = <3>;
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compatible = "ibm,plb405gp-pci", "ibm,plb-pci";
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primary;
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reg = <eec00000 8 /* Config space access */
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eed80000 4 /* IACK */
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eed80000 4 /* Special cycle */
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ef480000 40>; /* Internal registers */
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/* Outbound ranges, one memory and one IO,
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* later cannot be changed. Chip supports a second
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* IO range but we don't use it for now
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*/
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ranges = <02000000 0 80000000 80000000 0 20000000
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01000000 0 00000000 e8000000 0 00010000>;
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/* Inbound 2GB range starting at 0 */
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dma-ranges = <42000000 0 0 0 0 80000000>;
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/* Walnut has all 4 IRQ pins tied together per slot */
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interrupt-map-mask = <f800 0 0 0>;
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interrupt-map = <
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/* IDSEL 1 */
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0800 0 0 0 &UIC0 1c 8
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/* IDSEL 2 */
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1000 0 0 0 &UIC0 1d 8
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/* IDSEL 3 */
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1800 0 0 0 &UIC0 1e 8
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/* IDSEL 4 */
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2000 0 0 0 &UIC0 1f 8
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>;
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};
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};
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chosen {
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linux,stdout-path = "/plb/opb/serial@ef600300";
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};
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};
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