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

Question asked by Takayuki Ishii on Jan 31, 2020
Latest reply on Feb 9, 2020 by 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.

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