24 нояб. 2014 г., в 23:05, Alexander Kochetkov <al.kochet@xxxxxxxxx> написал(а): > Something (u-boot, may be) leave the bus in the wrong state. > Really strange. Actually something wrong with i2c-pullups on i2c.1 bus on fault boards. May be these are boards without pull-ups? All beagles doesn't have internal pull-ups on i2c.1 since u-boot 2011.x. Here is the bug in the u-boot related to beagle: http://git.denx.de/?p=u-boot.git;a=commit;h=04e2a13336f0e507ef416bbede3be92b79c46594 Yes, I made fix, but keep that in mind. For example one of the boards (omap3-beagle): http://status.armcloud.us/boot/omap3-beagle/job/next/kernel/next-20141124/defconfig/arm-omap2plus_defconfig/ http://status.armcloud.us/boot/omap3-beagle,legacy/job/next/kernel/next-20141124/defconfig/arm-omap2plus_defconfig/ http://status.armcloud.us/boot/omap3-beagle/job/next/kernel/next-20141124/defconfig/arm-multi_v7_defconfig/ has following warning message in the u-boot log: > U-Boot 2014.07 (Aug 21 2014 - 11:03:05) > > OMAP3530-GP ES3.0, CPU-OPP2, L3-165MHz, Max CPU Clock 600 MHz > OMAP3 Beagle board + LPDDR/NAND > .... > Beagle Rev C1/C2/C3 > Timed out in wait_for_event: status=1000 > Check if pads/pull-ups of bus 1 are properly configured Also beagle schematic has following log entry for A3: 4. Added optional pullup resistors on I2C2_SCL and I2C_SDA into the layout. Is the fault beagle is pre A3 revision? I can't tell anything about second one board (omap3-overo-tobi), because I could not get it schematic. And how you have i2c.1 working without pull-ups I don't know. Alexander. -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
