the WM8962 driver can not be probe

[captain_huang]

In our i.mx6 board ,we connect the audio device WM8962 to I2C2,while the sabre_SDP board connect the device to I2C1.

we also modify the kernel file "board-mx6q_sabresd.c" like below:

static struct i2c_board_info mxc_i2c0_board_info[] __initdata = {

#if 0

  {

  I2C_BOARD_INFO("wm8962", 0x1a),

  .platform_data = (void *)&wm8962_config_data,

  },

#endif

......

};

static struct i2c_board_info mxc_i2c1_board_info[] __initdata = {

#if 1

  {

  I2C_BOARD_INFO("wm8962", 0x1a),

  .platform_data = (void *)&wm8962_config_data,

  },

#endif

};

but we found that the WM8962 driver cannot be probed, and no wm8962 audio device found in the alsa list. if I connect it to the I2C1, it probed successful.

so i don't know what 's the problem, please help me to fix it ,thanks!

[igorpadykov]

Hi chao

in first place I would suggest to test with i.MX 6Series Platform SDK

if WM8962 can be discovered on I2C2.

As for Linux, there are comments file "board-mx6q_sabresd.c" :

/* On mx6x sabresd board i2c2 iomux with hdmi ddc,

* the pins default work at i2c2 function,

when hdcp enable, the pins should work at ddc function */

So please try to disable hdmi, i.MX_6Dual6Quad_Linux_Reference_Manual.pdf

L3.0.35_4.1.0_LINUX_DOCS

shows how to do that. Also Sabre SD board schematic

SPF-27392 rev.C3.pdf p.3 suggests:

Depopulate R153 and R154 (schematic page 22)

This removes HDMI comms channel from I2C2.

Best regards

chip

-----------------------------------------------------------------------------------------------------------------------

Note: If this post answers your question, please click the Correct Answer button. Thank you!

-----------------------------------------------------------------------------------------------------------------------

[captain_huang]

hi chip,

when i test this ,i have not  connected  the HDMI Display ,

so i don't think the HDMI occurs the problem , i just think it's somewhere in the software occurs this problem.

Best regards

[igorpadykov]

Hi chao

it does not matter, connected you hdmi or

not. Software configured pins for hdmi.

Best regards

chip

[captain_huang]

hi chip,

but i also connect the touch screen and OV5640 sensor to the I2C2, these devices work normally.

Best regards

[igorpadykov]

Hi chao

you may wish to debug it with

AN4553 Using Open Source Debugging Tools for Linux on i.MX Processors

and oscilloscope.

Best regards

chip