Hi all,
My board processor is MPC8555, it is an AMC board.
i want to add a node for my device to the device tree.
simply here is the old device tree :
***************************************
/ {
model = "MPC8555AMC";
compatible = "mpc85xx";
#address-cells = <1>;
#size-cells = <1>;
cpus {
#cpus = <1>;
#address-cells = <1>;
#size-cells = <0>;
PowerPC,[EMAIL PROTECTED] {
device_type = "cpu";
reg = <0>;
d-cache-line-size = <20>; // 32 bytes
i-cache-line-size = <20>; // 32 bytes
d-cache-size = <8000>; // L1, 32K
i-cache-size = <8000>; // L1, 32K
timebase-frequency = <0>; // 33 MHz, from uboot
bus-frequency = <0>; // From uboot
clock-frequency = <0>; // From uboot
32-bit;
linux,boot-cpu;
};
};
memory {
device_type = "memory";
reg = <00000000 20000000>;
};
[EMAIL PROTECTED] {
#address-cells = <1>;
#size-cells = <1>;
#interrupt-cells = <2>;
device_type = "soc";
ranges = <0 e0000000 00100000>;
reg = <e0000000 00100000>; // CCSRBAR 1M
bus-frequency = <0>;
[EMAIL PROTECTED] {
device_type = "i2c";
compatible = "fsl-i2c";
reg = <3000 100>;
interrupts = <1b 2>;
interrupt-parent = <40000>;
dfsrr;
};
[EMAIL PROTECTED] {
#address-cells = <1>;
#size-cells = <0>;
device_type = "mdio";
compatible = "gianfar";
reg = <24520 20>;
linux,phandle = <24520>;
[EMAIL PROTECTED] {
linux,phandle = <2452010>;
interrupt-parent = <40000>;
interrupts = <30 1>;
reg = <10>;
device_type = "ethernet-phy";
};
[EMAIL PROTECTED] {
linux,phandle = <2452011>;
interrupt-parent = <40000>;
interrupts = <30 1>;
reg = <11>;
device_type = "ethernet-phy";
};
};
[EMAIL PROTECTED] {
#address-cells = <1>;
#size-cells = <0>;
device_type = "network";
model = "TSEC";
compatible = "gianfar";
reg = <24000 1000>;
mac-address = [ 00 E0 0C 00 73 00 ];
interrupts = <d 2 e 2 12 2>;
interrupt-parent = <40000>;
phy-handle = <2452010>;
};
[EMAIL PROTECTED] {
#address-cells = <1>;
#size-cells = <0>;
device_type = "network";
model = "TSEC";
compatible = "gianfar";
reg = <25000 1000>;
mac-address = [ 00 E0 0C 00 73 01 ];
interrupts = <13 2 14 2 18 2>;
interrupt-parent = <40000>;
phy-handle = <2452011>;
};
[EMAIL PROTECTED] {
device_type = "serial";
compatible = "ns16550";
reg = <4500 100>;
clock-frequency = <0>;
interrupts = <1a 2>;
interrupt-parent = <40000>;
};
[EMAIL PROTECTED] {
linux,phandle = <40000>;
clock-frequency = <0>;
interrupt-controller;
#address-cells = <0>;
#interrupt-cells = <2>;
reg = <40000 40000>;
built-in;
compatible = "chrp,open-pic";
device_type = "open-pic";
big-endian;
interrupts = <
0 2 1 2 2 2 3 2
4 2 5 2 6 2 7 2
8 2 9 2 a 2 b 2
c 2 d 2 e 2 f 2
10 2 11 2 12 2 13 2
14 2 15 2 16 2 17 2
18 2 19 2 1a 2 1b 2
1c 2 1d 2 1e 2 1f 2
20 2 21 2 22 2 23 2
24 2 25 2 26 2 27 2
28 2 29 2 2a 2 2b 2
2c 2 2d 2 2e 2 2f 2
30 1
>;
interrupt-parent = <40000>;
};
};
};
****************************************
i want to add a node for the DMA in this tree. the PIC PDF tells me that DMA
channel 0 is connected to Internal interrupt number 4 so i add the following
node just before the pic node & after the serial node:
******************************************
[EMAIL PROTECTED] {
reg = <21100 44>;
interrupts = <4 2>;
interrupt-parent = <40000>;
};
******************************************
but when i called the of_find_node_by_name(NULL, "DMA");
unfortunately it returns NULL & i cant the a node with such a name.
i have checked this by printing all of the nodes in my tree which are:
cpus
PowerPC,8555
memory
soc8555
i2c
mdio
...
serial
pic
choosen
choosen
without a node of name DMA for sure.
so what else should i do to create this node?
thanks in advance for your help.
--
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