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From: Sascha Hauer <sha@pengutronix.de>
To: Oleksij Rempel <o.rempel@pengutronix.de>
Cc: barebox@lists.infradead.org, Robin van der Gracht <robin@protonic.nl>
Subject: Re: [PATCH v1] ARM: protonic: vicut1: disable on-die termination to fix PHY bootstrapping
Date: Tue, 25 May 2021 06:58:01 +0200	[thread overview]
Message-ID: <20210525045801.GI19819@pengutronix.de> (raw)
In-Reply-To: <20210518083707.15428-1-o.rempel@pengutronix.de>

On Tue, May 18, 2021 at 10:37:07AM +0200, Oleksij Rempel wrote:
> If on-die termination is enabled, the RXC pin of iMX6 will be pulled
> high. Since we already have an 10K pull-down on board, the RXC level on
> PHY reset will be ~800mV, which is mostly interpreted as 1. On some
> reboots we get 0 instead and kernel can't detect the PHY properly.
> 
> Since the default 0x020e07ac value is 0, it is sufficient to remove this
> entry from the affected imxcfg files.
> 
> Since we get stable 0 on pin PHYADDR[2], the PHY address is changed from
> 4 to 0.
> 
> Reported-by: Robin van der Gracht <robin@protonic.nl>
> Fixes: 00adc1e33ef8 ("ARM: add imx6 based Protonic boads")
> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
> ---
>  arch/arm/boards/protonic-imx6/flash-header-vicut1.imxcfg | 1 -
>  1 file changed, 1 deletion(-)

Applied, thanks

Sascha


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      reply	other threads:[~2021-05-25  4:59 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-18  8:37 Oleksij Rempel
2021-05-25  4:58 ` Sascha Hauer [this message]

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