Hi all,
I have a customized board based on lite5200b eval board. For this board,
PSC0 and PSC1 are configured to be UARTs.
I have configured the PSC1 in the device tree as followed:
serial@2000 { // PSC1
device_type = "serial";
compatible =
"fsl,mpc5200b-psc-uart","fsl,mpc5200-psc-uart";
port-number = <0>; // Logical port assignment
cell-index = <0>;
reg = <2000 100>;
interrupts = <2 1 0>;
interrupt-parent = <&mpc5200_pic>;
serial@2200 { // PSC2
device_type = "serial";
compatible =
"fsl,mpc5200b-psc-uart","fsl,mpc5200-psc-uart";
port-number = <1>; // Logical port assignment
cell-index = <1>;
reg = <2200 100>;
interrupts = <2 2 0>;
interrupt-parent = <&mpc5200_pic>;
I have also created the node /dev/ttyPSC0 and /dev/ttyPSC1. However,I
failed to read and write to ttyPSC1. But, I can open ttyPSC0 and read and
write to it though.
When I do a "cat /proc/interrupts", I got the following:
129: 832 MPC52xx Peripherals Level mpc52xx_psc_uart
130: 10 MPC52xx Peripherals Level
133: 0 MPC52xx Peripherals Level mpc52xx-fec_ctrl
134: 0 MPC52xx Peripherals Level ohci_hcd:usb1
135: 16127 MPC52xx Peripherals Level mpc52xx_ata
Under the interrupt 130, the mpc52xx_psc_uart is missing. Is there anything
wrong?
I can open the port ttyPSC1 successfully but unable to perform read and
write.
I am using ELDK4.2, uboot 2010 version and denx linux 3.1.
Any clues? Thanks
Regards
Kee Wee
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