iMX6 SDR12 Suport

johnjohntobias · ‎02-11-2015

Hello All,

I have a new iMX6SL custom board with WiLink8 chipset. The chipset has some features of SDIO 3.0 support and the I/O is 1.8v or (SDR25). I used the

mainline kernel 3.13, 3.19 and the Freescale (fsl-yocto-3.10.53-1.1.0), all of them detects the wifi. All of them uses 3.3v voltage signal.

clock: 50000000 Hz

actual clock: 49500000 Hz

vdd: 7 (1.65 - 1.95 V)

bus mode: 2 (push-pull)

chip select: 0 (don't care)

power mode: 2 (on)

bus width: 2 (4 bits)

timing spec: 2 (sd high-speed)

--->>> signal voltage: 0 (3.30 V) <---> it should be 1.8v

I would like to know if there's any available patches out there that I

could use in order support SDR25?.

Regards,

John Tobias

igorpadykov · ‎02-12-2015

Hi John

usually 1.8v selection is implemented by signal

x_VSELECT_SDx, such as in U508

Linux i.MX6SL has two board files mx6sl_arm2 (supported by ltib)

mx6sl_evk (supported by yocto and ltib). x_VSELECT_SDx is implemented

only on mx6sl_arm2 board.

Regarding sd3.0 support one can look below

Best regards

igor

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

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

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

johnjohntobias · ‎03-10-2015

Hi Igor,

Thanks for the response. I got it working.

Regards,

John