Hello,
I hope someone could help me with my problem. Currently I am porting
a new kernel (3.3.8) for a tqm5200s based board.
The previous kernel was 2.6.23. The new kernel version is needed because
of support for a wireless card.
I got issues with the i2c bus and this kernel. When the kernel boots up,
the i2c initialization ends in a timout. This is the kernel log:
[ 1.460652] i2c /dev entries driver
[ 1.465434] mpc-i2c f0003d40.i2c: timeout 1000000 us
Connected to the bus is an eeprom (Microchip 24c32a) and a realtime
clock (Philips PCF8563).
The i2c bus section in the dtb file looks as follows:
i2c@3d40 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,mpc5200-i2c","fsl-i2c";
reg = <0x3d40 0x40>;
interrupts = <2 16 0>;
fsl5200-clocking;
};
The dtb file from the kernel 2.6.23 looks as follows:
i2c@3d40 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,mpc5200-i2c","fsl-i2c";
reg = <0x3d40 0x40>;
interrupts = <2 16 0>;
fsl5200-clocking;
};
I can`t see any devices in /sys/bus/i2c/devices except the bus itself.
# ls /sys/bus/i2c/devices
# i2c-0
# cat /sys/bus/i2c/devices/i2c-0/name
# MPC adapter
Is there something wrong with my dtb file or is it a bug in the mpc-i2c driver
Best regards
Johannes
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