lubuntu的i2c驱动貌似与pwm驱动有冲突
本帖最后由 strangefay 于 2015-12-12 15:49 编辑加在pwm驱动后持续输出
i2c-0, xfer timeout
axp_mfd 0-0034: failed reading from 0x56
i2c-0, xfer timeout
axp_mfd 0-0034: failed reading from 0x78
i2c-0, xfer timeout
axp_mfd 0-0034: failed reading from 0x5e
i2c-0, xfer timeout
axp_mfd 0-0034: failed reading at 0xb9
i2c-0, xfer timeout
axp_mfd 0-0034: failed reading at 0x30
查看了一下应该是在drivers / i2c / busses / i2c-sunxi.c 下的809行左右
/* sleep and wait, do the transfer at interrupt handler ,timeout = 5*HZ */
805 timeout = wait_event_timeout(i2c->wait, i2c->msg_num == 0, i2c->adap.timeout);
806 /* return code,if(msg_idx == num) succeed */
807 ret = i2c->msg_idx;
808
809 if (timeout == 0){
810 //dev_dbg(i2c->adap.dev, "timeout \n");
811 pr_warning("i2c-%d, xfer timeout\n", i2c->bus_num);
812 ret = -ETIME;
813 }
还没来得及研究冲突原因 问下各位 有没有现成的解决方案
没有的话就只能抽时间自己抠代码了
谢谢了
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