Hi, On 17.03.2016 02:49, Sebastian Reichel wrote:
mh both, the power gpio is turned off in tpa6130a2_power(0). I guess if you don't see the problem during probe() everything works? I have another idea though: In opposit to the gpio, the regulator may also be referenced by something else/already enabled. I guess adding a sleep after the regulator_enable() is worth a try. Also I wonder if the same happens, if you avoid having the module available during boot and instead load it once everything has settled. That would rule out any side-effects of other modules being probed on the same i2c bus.
Well, I think I've figured it out - input pullups are not enabled on i2c bus pins, in stock kernel we have: ./devmem2 0x480021BC Value at address 0x480021BC (0x4001f1bc): 0x1180118 ./devmem2 0x480021C0 Value at address 0x480021C0 (0x4001f1c0): 0x1180118 in mainline ./devmem2 0x480021BC Value at address 0x480021BC (0xb6ff01bc): 0x1000100 ./devmem2 0x480021C0 Value at address 0x480021C0 (0xb6f6d1c0): 0x1000100 I wonder how i2c devices work at all :) Will fix the board DTS file later on an will report Regards, Ivo -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
