netdev - Re: [PATCH net-next v2 7/9] net: pcs: rzn1-miic: Add support to handle resets

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Message-ID: <9ad6ec03-bd01-463f-b076-e537bb7eada4@lunn.ch>
Date: Thu, 4 Sep 2025 22:43:14 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Clément Léger <clement.leger@...tlin.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	linux-renesas-soc@...r.kernel.org, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH net-next v2 7/9] net: pcs: rzn1-miic: Add support to
 handle resets

On Thu, Sep 04, 2025 at 12:42:01PM +0100, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> 
> Add reset-line handling to the RZN1 MIIC driver and move reset
> configuration into the SoC/OF data. Introduce MIIC_MAX_NUM_RSTS (= 2),
> add storage for reset_control_bulk_data in struct miic and add
> reset_ids and reset_count fields to miic_of_data.
> 
> When reset_ids are present in the OF data, the driver obtains the reset
> lines with devm_reset_control_bulk_get_exclusive(), deasserts them during
> probe and registers a devres action to assert them on remove or on error.
> 
> This change is preparatory work to support the RZ/T2H SoC, which exposes
> two reset lines for the ETHSS IP. The driver remains backward compatible
> for platforms that do not provide reset lines.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew