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Date:   Fri, 12 May 2017 08:33:55 +0800
From:   Shawn Guo <>
To:     Leonard Crestez <>
        Sascha Hauer <>,
        Anson Huang <>,
        Robin Gong <>,
        Peter Chen <>,
        Fabio Estevam <>,
        Henri Roosen <>,
        Marek Vasut <>,,,
Subject: Re: [PATCH v2] ARM: dts: imx6sx-sdb: Remove OPP override

On Fri, May 05, 2017 at 02:00:17PM +0300, Leonard Crestez wrote:
> The board file for imx6sx-sdb overrides cpufreq operating points to use
> higher voltages. This is done because the board has a shared rail for
> VDD_ARM_IN and VDD_SOC_IN and when using LDO bypass the shared voltage
> needs to be a value suitable for both ARM and SOC.
> This only applies to LDO bypass mode, a feature not present in upstream.
> When LDOs are enabled the effect is to use higher voltages than necessary
> for no good reason.
> Setting these higher voltages can make some boards fail to boot with ugly
> semi-random crashes reminiscent of memory corruption. These failures only
> happen on board rev. C, rev. B is reported to still work.
> Signed-off-by: Leonard Crestez <>
> CC:

Applied, thanks.

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