We pluged 4 USB device behind a 4 Port USB , and after booting, few times after the 4 device are recognize on lsusb, we got the following log and the tegra cpu is totally frozen
tegra-i2c tegra12-i2c.4: — register dump for debugging ----
[ 249.971601] tegra-i2c tegra12-i2c.4: I2C_CNFG - 0x2c00
[ 249.977195] tegra-i2c tegra12-i2c.4: I2C_PACKET_TRANSFER_STATUS - 0x1ff0001
[ 249.984652] tegra-i2c tegra12-i2c.4: I2C_FIFO_CONTROL - 0xe0
[ 249.990721] tegra-i2c tegra12-i2c.4: I2C_FIFO_STATUS - 0x800080
[ 249.997063] tegra-i2c tegra12-i2c.4: I2C_INT_MASK - 0xec
[ 250.003120] tegra-i2c tegra12-i2c.4: I2C_INT_STATUS - 0xc2
[ 250.009020] tegra-i2c tegra12-i2c.4: msg->len - 2
[ 250.014080] tegra-i2c tegra12-i2c.4: is_msg_write - 1
[ 250.019506] tegra-i2c tegra12-i2c.4: buf_remaining - 0
[ 250.025035] tegra-i2c tegra12-i2c.4: i2c transfer timed out, addr 0x0040, data 0x01
[ 250.033480] Failed to set dvfs regulator vdd_core
[ 251.010206] tegra-i2c tegra12-i2c.4: — register dump for debugging ----
[ 251.017840] tegra-i2c tegra12-i2c.4: I2C_CNFG - 0x2c00
[ 251.023594] tegra-i2c tegra12-i2c.4: I2C_PACKET_TRANSFER_STATUS - 0x1ff0001
[ 251.031274] tegra-i2c tegra12-i2c.4: I2C_FIFO_CONTROL - 0xe0
[ 251.037535] tegra-i2c tegra12-i2c.4: I2C_FIFO_STATUS - 0x800080
[ 251.044305] tegra-i2c tegra12-i2c.4: I2C_INT_MASK - 0xec
[ 251.050207] tegra-i2c tegra12-i2c.4: I2C_INT_STATUS - 0xc2
[ 251.056280] tegra-i2c tegra12-i2c.4: msg->len - 2
[ 251.061526] tegra-i2c tegra12-i2c.4: is_msg_write - 1
[ 251.067171] tegra-i2c tegra12-i2c.4: buf_remaining - 0
[ 251.073022] tegra-i2c tegra12-i2c.4: i2c transfer timed out, addr 0x0040, data 0x01
[ 251.081644] Failed to set dvfs regulator vdd_core
[ 252.097205] tegra-i2c tegra12-i2c.4: — register dump for debugging ----
[ 252.110497] tegra-i2c tegra12-i2c.4: I2C_CNFG - 0x2c00
[ 252.121952] tegra-i2c tegra12-i2c.4: I2C_PACKET_TRANSFER_STATUS - 0x1ff0001
[ 252.135169] tegra-i2c tegra12-i2c.4: I2C_FIFO_CONTROL - 0xe0
[ 252.146922] tegra-i2c tegra12-i2c.4: I2C_FIFO_STATUS - 0x800080
[ 252.158690] tegra-i2c tegra12-i2c.4: I2C_INT_MASK - 0xec
[ 252.169765] tegra-i2c tegra12-i2c.4: I2C_INT_STATUS - 0xc2
[ 252.180970] tegra-i2c tegra12-i2c.4: msg->len - 2
[ 252.191329] tegra-i2c tegra12-i2c.4: is_msg_write - 1
[ 252.202066] tegra-i2c tegra12-i2c.4: buf_remaining - 0
[ 252.212864] tegra-i2c tegra12-i2c.4: i2c transfer timed out, addr 0x0040, data 0x01
[ 252.232179] Failed to set dvfs regulator vdd_core
[ 253.224223] tegra-i2c tegra12-i2c.4: — register dump for debugging ----
[ 253.237505] tegra-i2c tegra12-i2c.4: I2C_CNFG - 0x2c00
[ 253.248759] tegra-i2c tegra12-i2c.4: I2C_PACKET_TRANSFER_STATUS - 0x1ff0001
[ 253.262080] tegra-i2c tegra12-i2c.4: I2C_FIFO_CONTROL - 0xe0
[ 253.273676] tegra-i2c tegra12-i2c.4: I2C_FIFO_STATUS - 0x800080
[ 253.285467] tegra-i2c tegra12-i2c.4: I2C_INT_MASK - 0xec
[ 253.296705] tegra-i2c tegra12-i2c.4: I2C_INT_STATUS - 0xc2
[ 253.307891] tegra-i2c tegra12-i2c.4: msg->len - 2
[ 253.318363] tegra-i2c tegra12-i2c.4: is_msg_write - 1
[ 253.329131] tegra-i2c tegra12-i2c.4: buf_remaining - 0
[ 253.339975] tegra-i2c tegra12-i2c.4: i2c transfer timed out, addr 0x0040, data 0x01
[ 253.359407] Failed to set dvfs regulator vdd_core
[ 253.370263] Failed to set regulator vdd_core for clock sdmmc4 to 1150 mV
[ 253.383631] sdhci-tegra sdhci-tegra.3: clock enable is failed, ret: -110
Any idea ?