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Date:   Tue, 23 Apr 2019 18:44:11 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     horms+renesas@...ge.net.au
Cc:     sergei.shtylyov@...entembedded.com, magnus.damm@...il.com,
        netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        andrew@...n.ch
Subject: Re: [PATCH net-next v3] ravb: Avoid unsupported internal delay
 mode for R-Car E3/D3

From: Simon Horman <horms+renesas@...ge.net.au>
Date: Tue, 23 Apr 2019 15:01:53 +0200

> According to the R-Car Gen3 Hardware Manual Rev 1.50 of Nov 30, 2018, the
> TX clock internal delay mode isn't supported on R-Car E3 (r8a77990) or D3
> (r8a77995). And by extension it is also not supported by RZ/G2E (r9a774c0).
> 
> This matches all ES versions of the affected SoCs as it is
> not clear if this problem will be resolved in newer chips.
> This can be revisited, as necessary.
> 
> This patch does not error-out if PHY_INTERFACE_MODE_RGMII_ID or
> PHY_INTERFACE_MODE_RGMII_TXID are used on SoCs where TX clock delay
> mode is not supported as there is a risk of introducing a regression
> when used in conjunction with older DT blobs present in the field.
> Rather, a warning is logged in such cases.
> 
> Based on work by Kazuya Mizuguchi.
> 
> Signed-off-by: Simon Horman <horms+renesas@...ge.net.au>
> Reviewed-by: Andrew Lunn <andrew@...n.ch>

Applied, thanks Simon.

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