Linux 2.6.37：i2c2超时

求助，我的i2c2通道在Linux2.6.37在版本不工作了，在2.6.32版本上不存在这个问题。什么情况？
omap_hwmod: i2c1: softreset failed (waited 10000 usec)
omap_hwmod: i2c2: softreset failed (waited 10000 usec)
omap_hwmod: i2c3: softreset failed (waited 10000 usec)
......
omap_device: omap_i2c.1: new worst case activate latency 0: 30517
omap_i2c omap_i2c.1: bus 1 rev3.12 at 400 kHz
omap_i2c omap_i2c.2: bus 2 rev3.12 at 400 kHz
omap_i2c omap_i2c.3: bus 3 rev3.12 at 400 kHz
......
omap_i2c omap_i2c.2: timeout waiting for bus ready
tlv320aic23_write cannot write 000 to register R15
omap_i2c omap_i2c.2: controller timed out waiting for start condition to finish
omap_i2c omap_i2c.2: timeout waiting for bus ready
tlv320aic23_write cannot write 047 to register R6
omap_i2c omap_i2c.2: timeout waiting for bus ready
tlv320aic23_write cannot write 004 to register R5
omap_i2c omap_i2c.2: controller timed out waiting for start condition to finish
omap_i2c omap_i2c.2: timeout waiting for bus ready
tlv320aic23_write cannot write 117 to register R0
omap_i2c omap_i2c.2: controller timed out waiting for start condition to finish
omap_i2c omap_i2c.2: timeout waiting for bus ready
tlv320aic23_write cannot write 117 to register R1
omap_i2c omap_i2c.2: timeout waiting for bus ready
tlv320aic23_write cannot write 010 to register R4
omap_i2c omap_i2c.2: controller timed out waiting for start condition to finish
omap_i2c omap_i2c.2: timeout waiting for bus ready
tlv320aic23_write cannot write 070 to register R2
omap_i2c omap_i2c.2: controller timed out waiting for start condition to finish
omap_i2c omap_i2c.2: timeout waiting for bus ready
tlv320aic23_write cannot write 070 to register R3
omap_i2c omap_i2c.2: controller timed out waiting for start condition to finish
omap_i2c omap_i2c.2: timeout waiting for bus ready
tlv320aic23_write cannot write 001 to register R9
asoc: tlv320aic23-hifi <-> omap-mcbsp-dai.0 mapping ok
ALSA device list:
  #0: am3517evm