linux-kernel - Re: [PATCH 3/3] net: stmicro: imx: set TX

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Date: Mon, 22 Apr 2024 10:51:00 +0200
From: Ahmad Fatoum <a.fatoum@...gutronix.de>
To: Steffen Trumtrar <s.trumtrar@...gutronix.de>,
 "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 <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, Clark Wang <xiaoning.wang@....com>,
 Linux Team <linux-imx@....com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Jose Abreu <joabreu@...opsys.com>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: imx@...ts.linux.dev, devicetree@...r.kernel.org, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 3/3] net: stmicro: imx: set TX_CLK direction in RMII mode

Hello Steffen,

On 22.04.24 10:46, Steffen Trumtrar wrote:
> +		dwmac->enet_clk_regmap = syscon_regmap_lookup_by_phandle(np, "enet_clk_sel");
> +		if (IS_ERR(dwmac->enet_clk_regmap))
> +			return PTR_ERR(dwmac->enet_clk_regmap);
> +
> +		err = of_property_read_u32_index(np, "enet_clk_sel", 1, &dwmac->enet_clk_reg_off);
> +		if (err) {
> +			dev_err(dev, "Can't get enet clk sel reg offset (%d)\n", err);
> +			return err;
> +		}

This looks like the property is not optional. The property needs to stay optional
as not to break backwards compatibility with older device trees.

Cheers,
Ahmad

>  	}
>  
>  	return err;
> 

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