I2C does't working

[PramodKumar]

Hii

currently i am working on imx233 board and i use kernel version 2.6.35 by ltib.. i2c-mxs.object is proper created but my problem is that when i am using i2c .it is not working , i used bank 1 ,23 and 24 pin for i2c device but is not responding..

can anyone help me

Thanks&Regard

pramod kumar

[BiyongSUN]

if you are using the uboot you can issue i2c probe command to see if it can find device on the i2c bus.

also you can check the i2c wave on the oscilloscope.

[PramodKumar]

Hii

Biyong Sun

i am not working u-boot level ..i m working on kernel level in kernel version 2.6.35.3

[BiyongSUN]

kernel layer.

in the linux rootfs, you can find i2cdetect

How's the i2c wave on the oscilloscope. Did you measure that?

i2cdetect -l

i2c-0   i2c             21a0000.i2c                             I2C adapter

i2c-1   i2c             21a4000.i2c                             I2C adapter

i2c-2   i2c             21a8000.i2c                             I2C adapter

[PramodKumar]

Hii

Biyong Sun

i have cheked both of i2c pin using oscilloscope. its proper genreate the singal

and when i run i2cdetect -l command its show this messege

i2cdetect -l

i2c-0   i2c             MXS I2C adapter                         I2C adapter

please tell me what i can do ?

[BiyongSUN]

Please make sure the iomux is correct.

then check the i2c wave on the oscilloscope.

[PramodKumar]

i have checked already i2c wave its proper generate signal ....can you tell me how to change the iomux confugration in ltib kernel varsion 2.6.35

this time i am using scl (1 ,23),sda(1,24) ....and i am currently working on imx233

like this

#define PINID_I2C_SCL	MXS_PIN_ENCODE(1, 23)
#define PINID_I2C_SDA	MXS_PIN_ENCODE(1, 24)

#if defined(CONFIG_I2C_MXS) || \

    defined(CONFIG_I2C_MXS_MODULE)

    {

     .name = "I2C_SCL",

     .id = PINID_I2C_SCL,

     .fun = PIN_FUN2,

     .strength = PAD_4MA,

     .voltage = PAD_3_3V,

     .drive    = 1,

     },

    {

     .name = "I2C_SDA",

     .id = PINID_I2C_SDA,

     .fun = PIN_FUN2,

     .strength = PAD_4MA,

     .voltage = PAD_3_3V,

     .drive    = 1,

     },

[BiyongSUN]

If the wave can be captured, you can check each of the i2c start/read/write/stop form to see what's the i2c is doing that time.

[PramodKumar]

i have already checked  open  read and write by using i2c application  open is proper work but  and read  write failed also  read internal rtc but it is producing same .....

[BiyongSUN]

Where is the wave  on the oscilloscope.

You can read the wave to check what's the issue.