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<P><FONT SIZE=2>Hi,<BR>
<BR>
I'm using TQM5200 (MPC5200) chip with linux-2.6-denx. Problem is to get second I2c bus to work (/dev/i2c-0) . /dev/i2c-1 seems to be internal bus and I can read ex. lm75 temperature sensor, also I can see traffic in oscilloscope (only error is "I2C: No RXAK", but it seems to be working). My .dts setup is:<BR>
<BR>
<BR>
i2c@3d00 {<BR>
#address-cells = <1>;<BR>
#size-cells = <0>;<BR>
compatible = "fsl,mpc5200-i2c","fsl-i2c";<BR>
reg = <0x3d00 0x40>; // mapped to /dev/i2c-0<BR>
cell-index = <0>;<BR>
interrupts = <2 16 0>; //neather <2 15 0> is not working says: I2C: MAL<BR>
interrupt-parent = <&mpc5200_pic>;<BR>
fsl5200-clocking;<BR>
<BR>
};<BR>
<BR>
i2c@3d40 {<BR>
#address-cells = <1>;<BR>
#size-cells = <0>; // mapped to /dev/i2c-1<BR>
compatible = "fsl,mpc5200-i2c","fsl-i2c";<BR>
reg = <0x3d40 0x40>;<BR>
cell-index = <1>;<BR>
interrupts = <2 16 0>;<BR>
interrupt-parent = <&mpc5200_pic>;<BR>
fsl5200-clocking;<BR>
rtc@68 {<BR>
device_type = "rtc";<BR>
compatible = "dallas,ds1307";<BR>
reg = <0x68>;<BR>
};<BR>
<BR>
};<BR>
<BR>
And kernel says in boot:<BR>
[ 1.270973] i2c /dev entries driver<BR>
[ 1.275664] i2c-core: driver [dev_driver] registered<BR>
[ 1.276395] i2c-adapter i2c-0: adapter [MPC adapter] registered<BR>
[ 1.277066] i2c-dev: adapter [MPC adapter] registered as minor 0<BR>
[ 1.277802] i2c-adapter i2c-1: adapter [MPC adapter] registered<BR>
[ 1.277975] i2c 1-0068: uevent<BR>
[ 1.278415] i2c-adapter i2c-1: client [ds1307] registered with bus id 1-0068<BR>
[ 1.279042] i2c-dev: adapter [MPC adapter] registered as minor 1<BR>
<BR>
<BR>
And:<BR>
# ls -la /dev/i2c-*<BR>
crwxrwxrwx 1 root root 89, 0 Aug 13 2008 /dev/i2c-0<BR>
crwxrwxrwx 1 root root 89, 1 Aug 14 2008 /dev/i2c-1<BR>
#<BR>
<BR>
If I try read something from /dev/i2c-0, it says:<BR>
# dmesg<BR>
[ 2628.107343] i2c-adapter i2c-0: ioctl, cmd=0x703, arg=0x01<BR>
[ 2628.107880] i2c-dev: i2c-0 reading 2 bytes.<BR>
[ 2628.107934] i2c-adapter i2c-0: master_xfer[0] R, addr=0x01, len=2<BR>
[ 2628.107956] Doing read 2 bytes to 0x01 - 1 of 1 messages<BR>
[ 2629.105411] I2C: wait timeout<BR>
<BR>
Any ideas?<BR>
<BR>
Best Regards,<BR>
Jani Särkijärvi<BR>
<BR>
<BR>
</FONT>
</P>
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