T113S3 I2C异常

[lztmfx]

root@TinaLinux:/# i2cdetect -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f[ 225.484348] sunxi-i2c sunxi-i2c0: runtime resume finish

00: [ 225.494594] sunxi-i2c sunxi-i2c0: engine-mode: start signal xfered
[ 225.494608] sunxi-i2c sunxi-i2c0: engine-mode: [slave address:(0x3),irq state:(0x8)]
[ 225.511400] sunxi-i2c sunxi-i2c0: engine-mode: 7bits+r/w = 0x6 xfered
[ 225.518624] sunxi-i2c sunxi-i2c0: engine-mode: data 0x6 xfered
[ 230.529514] sunxi-i2c sunxi-i2c0: engine-mode: xfer timeout(dev addr:0x3)
[ 230.529546] sunxi-i2c sunxi-i2c0: runtime suspend finish
[ 230.537143] 0x02502000: 00000000 00000000 00000000 00000000
[ 230.549452] 0x02502010: 00000000 00000000 00000000 00000000
-- [ 230.555922] sunxi-i2c sunxi-i2c0: runtime resume finish
[ 230.562028] sunxi-i2c sunxi-i2c0: engine-mode: start signal xfered
[ 235.569499] sunxi-i2c sunxi-i2c0: engine-mode: xfer timeout(dev addr:0x4)
[ 235.569529] sunxi-i2c sunxi-i2c0: runtime suspend finish
[ 235.577115] 0x02502000: 00000000 00000000 00000000 00000000
[ 235.577121] 0x02502010: 00000000 00000000 00000000 00000000
-- [ 235.595857] sunxi-i2c sunxi-i2c0: runtime resume finish
[ 235.601971] sunxi-i2c sunxi-i2c0: engine-mode: start signal xfered
^C[ 240.609525] sunxi-i2c sunxi-i2c0: engine-mode: xfer timeout(dev addr:0x5)
[ 240.609543] sunxi-i2c sunxi-i2c0: runtime suspend finish
[ 240.617154] 0x02502000: 00000000 00000000 00000000 00000000
[ 240.629478] 0x02502010: 00000000 00000000 00000000 00000000

root@TinaLinux:/# i2cdetect -l
i2c-0 i2c sunxi-i2c0 I2C adapter

换了其他没有挂任何设备的I2C也是一样的报错，是不是kernel什么地方配置不对啊？和开源的好几个项目都对比过config配置了，不知道怎么排查了

[z2500abc]

@lztmfx 是不是 设备树配置有问题啊，先检查下设备树的配置了

[awwwwa]

engine-mode开了，配置 下twi_drv_used = <1>;

[lztmfx]

@z2500abc 闹乌龙了，SCL和旁边的PWM引脚连锡了，另外正常的哪路TWI也会打印许多信息，我直接把kernel 的log等级改成3就不打印这么多了

[lztmfx]

@awwwwa twi_drv_used 是做什么的？以前没看到过，我试试看，我后来把kernel log等级改成3就不打印这么多了

[awwwwa]

@lztmfx 是否使用DMA

[z2500abc]

@lztmfx DMA功能的