netdev - Re: [net-next PATCH v14 06/16] net: mdio: regmap: prepare support for multiple valid addr

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Message-ID: <fc1ee916-c34f-4a73-bdf6-6344846d561b@lunn.ch>
Date: Thu, 10 Apr 2025 19:13:34 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Christian Marangi <ansuelsmth@...il.com>
Cc: Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	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>,
	Vladimir Oltean <olteanv@...il.com>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	Maxime Chevallier <maxime.chevallier@...tlin.com>,
	"Chester A. Unal" <chester.a.unal@...nc9.com>,
	Daniel Golle <daniel@...rotopia.org>,
	DENG Qingfang <dqfext@...il.com>,
	Sean Wang <sean.wang@...iatek.com>, Simon Horman <horms@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	upstream@...oha.com
Subject: Re: [net-next PATCH v14 06/16] net: mdio: regmap: prepare support
 for multiple valid addr

On Tue, Apr 08, 2025 at 11:51:13AM +0200, Christian Marangi wrote:
> Rework the valid_addr and convert it to a mask in preparation for mdio
> regmap to support multiple valid addr in the case the regmap can support
> it.
>  	mr = mii->priv;
>  	mr->regmap = config->regmap;
> -	mr->valid_addr = config->valid_addr;
> +	mr->valid_addr_mask = BIT(config->valid_addr);

I don't see how this allows you to support multiple addresses. You
still only have one bit set in mr->valid_addr_mask.

      Andrew