I'm hoping someone can offer some advice on this:
I'm working with an embedded platform that does not pass anything from
firmware. I'm just trying to get some activity out the serial console at
this stage. simpleImage.bseip compiled with the following bseip.dts seems
to freeze before anything is written to the console. I'm assuming the
standard 8xx code will pickup this device tree, and work from there. Is
this correct? Shouldn't I see some output?
/dts-v1/;
/ {
model = "BSEIP";
compatible = "fsl,bseip";
#address-cells = <1>;
#size-cells = <1>;
cpus {
#address-cells = <1>;
#size-cells = <0>;
PowerPC,823 at 0 {
compatible = "PowerPC,8xx";
device_type = "cpu";
reg = <0x0>;
d-cache-line-size = <8>; // 8 bytes
per line
i-cache-line-size = <8>; // 8 bytes
per line
d-cache-size = <0x0400>; // L1, 1K
i-cache-size = <0x0800>; // L1, 2K
timebase-frequency = <48000000>;
bus-frequency = <48000000>;
clock-frequency = <48000000>;
interrupts = <15 2>;
// decrementer interrupt
interrupt-parent = <&PIC>;
};
};
memory {
device_type = "memory";
reg = <0 0x1000000>;
};
soc at ff000000 {
compatible = "fsl,mpc823", "fsl,pq1-soc";
#address-cells = <1>;
#size-cells = <1>;
device_type = "soc";
ranges = <0 0xff000000 0x00004000>;
reg = <0xff000000 0x4000>;
bus-frequency = <48000000>;
PIC: interrupt-controller at 0 {
interrupt-controller;
#interrupt-cells = <2>;
reg = <0 0x24>;
compatible = "fsl,mpc823-pic",
"fsl,pq1-pic";
};
pcmcia at 80 {
#address-cells = <3>;
#interrupt-cells = <1>;
#size-cells = <2>;
compatible = "fsl,pq-pcmcia";
device_type = "pcmcia";
reg = <0x80 0x80>;
interrupt-parent = <&PIC>;
interrupts = <13 1>;
};
cpm at 9c0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "fsl,mpc823-cpm",
"fsl,cpm1";
command-proc = <0x9c0>;
interrupts = <0>; // cpm error
interrupt
interrupt-parent = <&CPM_PIC>;
reg = <0x9c0 0x40>;
ranges;
muram at 2000 {
#address-cells = <1>;
#size-cells = <1>;
ranges = <0 0x2000
0x2000>;
data at 0 {
compatible =
"fsl,cpm-muram-data";
reg = <0
0x1c00>;
};
};
brg at 9f0 {
compatible =
"fsl,mpc823-brg",
"fsl,cpm1-brg",
"fsl,cpm-brg";
reg = <0x9f0 0x10>;
clock-frequency =
<48000000>;
};
CPM_PIC: interrupt-controller at 930 {
interrupt-controller;
#interrupt-cells = <1>;
interrupts = <5 2 0 2>;
interrupt-parent = <&PIC>;
reg = <0x930 0x20>;
compatible =
"fsl,mpc823-cpm-pic",
"fsl,cpm1-pic";
};
serial at a80 {
device_type = "serial";
compatible =
"fsl,mpc823-smc-uart",
"fsl,cpm1-smc-uart";
reg = <0xa80 0x10 0x3e80
0x40>;
interrupts = <4>;
interrupt-parent =
<&CPM_PIC>;
fsl,cpm-brg = <1>;
fsl,cpm-command = <0x90>;
current-speed = <9600>;
};
serial at a90 {
device_type = "serial";
compatible =
"fsl,mpc823-smc-uart",
"fsl,cpm1-smc-uart";
reg = <0xa90 0x10 0x3f80
0x40>;
interrupts = <3>;
interrupt-parent =
<&CPM_PIC>;
fsl,cpm-brg = <2>;
fsl,cpm-command = <0xd0>;
current-speed = <9600>;
};
ethernet at a20 {
device_type = "network";
compatible =
"fsl,mpc823-scc-enet",
"fsl,cpm1-scc-enet";
reg = <0xa20 0x18 0x3c00
0x100>;
local-mac-address = [ 00
00 00 00 00 00 ];
interrupts = <30>;
interrupt-parent =
<&CPM_PIC>;
fsl,cpm-command = <0x80>;
linux,network-index = <1>;
};
};
};
chosen {
linux,stdout-path = "/soc/cpm/serial at a80";
};
};