[PATCH] arm: mvebu: update RTC values for PCIe memory wrappers

Baruch Siach baruch at tkos.co.il
Wed Feb 26 05:49:33 CET 2020

Hi Chris,

On Wed, Feb 26 2020, Chris Packham wrote:
> From: Chris Packham <chris.packham at alliedtelesis.co.nz>
> Update the RTC (Read Timing Control) values for PCIe memory wrappers
> following an ERRATA (ERRATA# TDB). This means the PCIe accesses will
> used slower memory Read Timing, to allow more efficient energy
> consumption, in order to lower the minimum VDD of the memory.  Will lead
> to more robust memory when voltage drop occurs (VDDSEG)

Have you seen memory access reliability problems because of this issue?

> The code is based on changes from Marvell's U-Boot, specifically:
> https://github.com/MarvellEmbeddedProcessors/u-boot-marvell/commit/20cd2704072512de176e048970f2883db901674b
> https://github.com/MarvellEmbeddedProcessors/u-boot-marvell/commit/eb608a7c8dd0d42b87601a61b9c0cc5615ab94b2
> https://github.com/MarvellEmbeddedProcessors/u-boot-marvell/commit/c4af19ae2bf08cf6e450e741ce4f04d402a5cb6b
> https://github.com/MarvellEmbeddedProcessors/u-boot-marvell/commit/c4af19ae2bf08cf6e450e741ce4f04d402a5cb6b

The last link looks duplicated.


     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
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