I must port Linux on a proprietary board (whitout Open Firmware).
This board uses the PPC750Fx processor with proprietary components.
1. I have write the followind device tree. Can you say me if it's correct?
2. The epicea bridge is a custom component (ASIC), and I will know if
the compatible field is correct.
Must I write a file for each component? Can I use a generic file for
pic or uart?
3. Must I indicate the clock frequency for each component? Or can I
indicate only the epicea clock frequency?
Thanks
/*
* Device Tree Souce for SMD88ND Thales board
*
* Choose CONFIG_SMD88ND to build a kernel for SMD88ND, or use
* the default configuration smd88nd_defconfig.
*
* Based on sandpoint.dts
*
* 2007 (c) N. MEDERLE <[EMAIL PROTECTED]>
*
*
* To build:
* dtc -I dts -O asm -o smd88ng.S -V 16 smd88ng.dts
* dtc -I dts -O dtb -o smd88ng.dtb -V 16 smd88ng.dts
*/
/ {
linux,phandle = <1000>;
model = "smd88ng";
compatible = "smd88ng";
#address-cells = <1>;
#size-cells = <1>;
/* ===== Processor ===== */
cpus {
linux,phandle = <2000>;
#cpus = <1>;
#address-cells = <1>;
#size-cells = <0>;
/* ===== CPU used ===== */
PowerPC,[EMAIL PROTECTED] { /* Really
PPC750FX */
linux,phandle = <2100>;
device_type = "cpu";
reg = <0>;
clock-frequency = <23C34600>; /* 600MHz */
timebase-frequency = <1312D00>; /* 20MHz (bus-freq/4) */
bus-frequency = <4C4B400>; /* 80MHz */
i-cache-line-size = <20>; /* 32 bytes */
d-cache-line-size = <20>; /* 32 bytes */
i-cache-size = <8000>; /* L1, 32K */
d-cache-size = <8000>; /* L1, 32K */
};
};
/* ===== RAM ===== */
memory {
linux,phandle = <3000>;
device_type = "memory";
reg = <00000000 10000000>; /* 256Mb */
};
/* ===== Bridge Epicea (custom component) ===== */
[EMAIL PROTECTED] {
linux,phandle = <4000>;
device_type = "epicea-bridge"; /* ??? */
#address-cells = <1>;
#size-cells = <1>;
#interrupt-cells = <2>;
ranges = <20000000 20000000 02000000>;
reg = <20000000 02000000>;
/* ===== Interrupt Controller ===== */
[EMAIL PROTECTED] {
linux,phandle = <6000>;
device_type = "pic";
compatible = "epicea-pic"; /* ??? */
#address-cells = <0>;
#interrupt-cells = <2>;
reg = <20006000 2000>;
clock-frequency = <4C4B400>; /* 0 or 80MHz ??? */
interrupt-controller;
built-in;
big-endian;
};
/* ===== DMA #0 ===== */
[EMAIL PROTECTED] {
linux,phandle = <8000>;
device_type = "dma";
compatible = "epicea-dma"; /* ??? */
#address-cells = <1>;
#size-cells = <1>;
#interrupt-cells = <1>;
reg = <20008000 2c>;
clock-frequency = <4C4B400>; /* or 0 ??? */
interrupts = <2a 2 2b 2>; /* level 2a & 2b, Low */
interrupt-parent = <6000>;
};
/* ===== DMA #1 ===== */
[EMAIL PROTECTED] {
linux,phandle = <9000>;
device_type = "dma";
compatible = "epicea-dma"; /* ??? */
#address-cells = <1>;
#size-cells = <1>;
#interrupt-cells = <1>;
reg = <20009000 2c>;
clock-frequency = <4C4B400>; /* or 0 ??? */
interrupts = <34 2 35 2>; /* level 34 & 35, Low */
interrupt-parent = <6000>;
};
/* ===== USART #0 ===== */
[EMAIL PROTECTED] {
linux,phandle = <1A000>;
device_type = "serial";
compatible = "epicea-serial"; /* ??? */
reg = <2001a000 1000>;
clock-frequency = <4C4B400>; /* or 0 ?? */
current-speed = <2580>; /* 9600 bauds */
interrupts = <38 2 39 2 3a 2 3b 2>; /* level 38 to 3b,Low */
interrupt-parent = <6000>;
};
/* ===== USART #1 ===== */
[EMAIL PROTECTED] {
linux,phandle = <1B000>;
device_type = "serial";
compatible = "epicea-serial"; /* ??? */
reg = <2001b000 1000>;
clock-frequency = <4C4B400>; /* or 0 ?? */
current-speed = <2580>; /* 9600 bauds */
interrupts = <18 2 19 2 1a 2 1b 2>; /* level 18 to 1b,Low */
interrupt-parent = <6000>;
};
/* ===== USART #2 ===== */
[EMAIL PROTECTED] {
linux,phandle = <1C000>;
device_type = "serial";
compatible = "epicea-serial"; /* ??? */
reg = <2001c000 1000>;
clock-frequency = <4C4B400>; /* or 0 ?? */
current-speed = <2580>; /* 9600 bauds */
interrupts = <10 2 11 2 12 2 13 2>; /* Level 10 to 13,Low */
interrupt-parent = <6000>;
};
/* ===== I2C bus ===== */
[EMAIL PROTECTED] {
linux,phandle = <15000>;
device_type = "i2c";
compatible = "epicea-i2c"; /* ??? */
reg = <20015000 1000>;
interrupts = <16 2>; /* level 16, Low */
interrupt-parent = <6000>;
};
/* ===== DMA for USART ===== */
[EMAIL PROTECTED] {
linux,phandle = <1D000>;
device_type = "dma";
compatible = "epicea-dma"; /* ??? */
#address-cells = <1>;
#size-cells = <1>;
#interrupt-cells = <1>;
reg = <2001D000 20>;
clock-frequency = <0>;
interrupts = <36 2 37 2>; /* Level 36 & 37,Low */
interrupt-parent = <6000>;
};
};
};
--
Cordialement,
Nicolas MEDERLE.
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