About "Suspend & Resume bypass" issue in errata[ERR006282] of i.MX6Quad.

[takayuki_ishii]

Hello community,

The IMX6DQCE errata sheet [ERR006282] points out three problems.

1) PFD is in an unknown state during boot.

2) Reprogramming PLL2/ PLL3

3) Suspend & Resume with PLL2/PLL3 bypassed.

1) is fixed by silicon revision 1.3

2) is fixed by u-boot patch.

But 3) it would be affected by software setting. so it have no patch and must care by user I think.

In default setting of Linux/Android BSP, is it cared?

Q1.

Is the standard BSP implemented so that it does not conflict with this errata?

Q2.

If so, which type of implementation of each linux/android BSP to avoid it?

 1) Are BSP set respective PFDx_CLKGATE bits because PLL is bypassed.

 2) BSP is not set PLL bypass mode.

Q3.

Doe's it have any possibility to set pll bypassed?

Like a 

 * Enable serial console as stand-up source.

 * Enable a resume function as USB device.

I look forward to hearing from you.

Best regards,

Ishii.

[igorpadykov · Accepted solution]

Hi Ishii

>Q1.Is the standard BSP implemented so that it does not conflict with this errata?

yes

>Q2.If so, which type of implementation of each linux/android BSP to avoid it?

BSP does not set PLL bypass mode.

>Q3. Doe's it have any possibility to set pll bypassed?

standard BSP does not use pll bypassed.

Best regards
igor
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[takayuki_ishii]

Hello Igor,

Thank you for your answer.

Then we must look for another reason for our problem.

Best regards,

Ishii.