Problems with i2c_eg20t

Christian Gmeiner
2011-10-18T11:16:15Z

Hi all

I am using a 3.0.7 linux kernel with "[PATCH x/7 v4] i2c-eg20t: ..."
from 12. October on top of
it.

...
...
[ 1.439115] i2c_eg20t 0000:02:0c.2: pch_i2c_probe :Entered.
[ 1.439163] i2c_eg20t 0000:02:0c.2: PCI INT C -> GSI 18 (level,
low) -> IRQ 18
[ 1.439602] i2c-dev: adapter [i2c_eg20t] registered as minor 0
[ 1.439738] i2c i2c-0: adapter [i2c_eg20t] registered
[ 1.460041] i2c_eg20t 0000:02:0c.2: pch_i2c_init :I2CCTL=380
pch_i2cbc=fc0 pch_i2ctmr=186a Enable interrupts
[ 1.460097] i2c_eg20t 0000:02:0c.2: pch_i2c_probe :returns 0.
...
...
[ 2.098641] i2c 0-0050: uevent
[ 2.098823] at24 0-0050: probe
[ 2.098874] i2c 0-0051: uevent
[ 2.099070] dummy 0-0051: probe
[ 2.099084] i2c i2c-0: client [dummy] registered with bus id 0-0051
[ 2.099099] at24 0-0050: 512 byte 24c04 EEPROM, writable, 16 bytes/write
[ 2.099130] i2c i2c-0: master_xfer[0] W, addr=0x50, len=1
[ 2.099140] i2c i2c-0: master_xfer[1] R, addr=0x50, len=24
[ 2.099151] i2c_eg20t 0000:02:0c.2: pch_i2c_xfer
:adap->p_adapter_info->pch_i2c_suspended is 0
[ 2.099161] i2c_eg20t 0000:02:0c.2: pch_i2c_xfer :After invoking
I2C_MODE_SEL :flag= 0x0
[ 2.099171] i2c_eg20t 0000:02:0c.2: pch_i2c_xfer :invoking pch_i2c_writebytes
[ 2.099187] i2c_eg20t 0000:02:0c.2: pch_i2c_writebytes :I2CCTL =
390 msgs->len = 1
[ 2.099202] i2c_eg20t 0000:02:0c.2: pch_i2c_start :I2CCTL = 390
[ 2.099559] i2c_eg20t 0000:02:0c.2: pch_i2c_cb :PCH_I2CSR = 28
[ 2.099586] i2c_eg20t 0000:02:0c.2: pch_i2c_writebytes :writing 0
to Data register
[ 2.099872] i2c_eg20t 0000:02:0c.2: pch_i2c_cb :PCH_I2CSR = 28
[ 2.099903] i2c_eg20t 0000:02:0c.2: pch_i2c_repstart :I2CCTL = 3b0
[ 2.099915] i2c_eg20t 0000:02:0c.2: pch_i2c_writebytes :return=1
[ 2.101095] i2c i2c-0: master_xfer[0] W, addr=0x50, len=1
[ 2.101107] i2c i2c-0: master_xfer[1] R, addr=0x50, len=24
[ 2.101118] i2c_eg20t 0000:02:0c.2: pch_i2c_xfer
:adap->p_adapter_info->pch_i2c_suspended is 0
[ 2.101128] i2c_eg20t 0000:02:0c.2: pch_i2c_xfer :After invoking
I2C_MODE_SEL :flag= 0x0
[ 2.101138] i2c_eg20t 0000:02:0c.2: pch_i2c_xfer :invoking pch_i2c_writebytes
[ 2.101153] i2c_eg20t 0000:02:0c.2: pch_i2c_writebytes :I2CCTL =
3b4 msgs->len = 1
[ 2.122099] i2c_eg20t 0000:02:0c.2: pch_i2c_wait_for_bus_idle :I2CSR = 28
[ 2.122116] i2c_eg20t 0000:02:0c.2: pch_i2c_wait_for_bus_idle
:pch_i2c_wait_for_bus_idle: Timeout Error.return-62
[ 2.143103] i2c_eg20t 0000:02:0c.2: pch_i2c_init :I2CCTL=380
pch_i2cbc=fc0 pch_i2ctmr=186a Enable interrupts
[ 2.145097] i2c i2c-0: master_xfer[0] W, addr=0x50, len=1
[ 2.145112] i2c i2c-0: master_xfer[1] R, addr=0x50, len=24
[ 2.145124] i2c_eg20t 0000:02:0c.2: pch_i2c_xfer
:adap->p_adapter_info->pch_i2c_suspended is 0
[ 2.145135] i2c_eg20t 0000:02:0c.2: pch_i2c_xfer :After invoking
I2C_MODE_SEL :flag= 0x0
[ 2.145145] i2c_eg20t 0000:02:0c.2: pch_i2c_xfer :invoking pch_i2c_writebytes
[ 2.145160] i2c_eg20t 0000:02:0c.2: pch_i2c_writebytes :I2CCTL =
390 msgs->len = 1
[ 2.145174] i2c_eg20t 0000:02:0c.2: pch_i2c_start :I2CCTL = 390
[ 2.145530] i2c_eg20t 0000:02:0c.2: pch_i2c_cb :PCH_I2CSR = 28
[ 2.145556] i2c_eg20t 0000:02:0c.2: pch_i2c_writebytes :writing 0
to Data register
[ 2.145843] i2c_eg20t 0000:02:0c.2: pch_i2c_cb :PCH_I2CSR = 28
[ 2.145874] i2c_eg20t 0000:02:0c.2: pch_i2c_repstart :I2CCTL = 3b0
[ 2.145886] i2c_eg20t 0000:02:0c.2: pch_i2c_writebytes :return=1
[ 2.147055] failed to read eeprom

Any hints? Btw. the eg20t i2c driver works much better with the patch
series from 12. October.

greets