linux-kernel - Re: [PATCH v2 net-next 2/2] net: phy: c45-tja11xx: add support for outputing RMII reference clock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZwTt0R_n40ohJqH1@shell.armlinux.org.uk>
Date: Tue, 8 Oct 2024 09:31:13 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Wei Fang <wei.fang@....com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, andrew@...n.ch, f.fainelli@...il.com,
	hkallweit1@...il.com, andrei.botila@....nxp.com,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, imx@...ts.linux.dev
Subject: Re: [PATCH v2 net-next 2/2] net: phy: c45-tja11xx: add support for
 outputing RMII reference clock

On Tue, Oct 08, 2024 at 03:07:08PM +0800, Wei Fang wrote:
> @@ -1561,8 +1565,13 @@ static int nxp_c45_set_phy_mode(struct phy_device *phydev)
>  			phydev_err(phydev, "rmii mode not supported\n");
>  			return -EINVAL;
>  		}
> -		phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_MII_BASIC_CONFIG,
> -			      MII_BASIC_CONFIG_RMII);
> +
> +		if (priv->flags & TJA11XX_REVERSE_MODE)
> +			phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_MII_BASIC_CONFIG,
> +				      MII_BASIC_CONFIG_RMII | MII_BASIC_CONFIG_REV);
> +		else
> +			phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_MII_BASIC_CONFIG,
> +				      MII_BASIC_CONFIG_RMII);

Netdev has an 80 column limit, and this needs commenting because we have
PHY_INTERFACE_MODE_REVRMII which could be confused with this (although
I haven't checked.)

		u16 basic_config;
		...
		basic_config = MII_BASIC_CONFIG_RMII;

		/* This is not PHY_INTERFACE_MODE_REVRMII */
		if (priv->flags & TJA11XX_REVERSE_MODE)
			basic_config |= MII_BASIC_CONFIG_REV;

		phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_MII_BASIC_CONFIG,
			      basic_config);

is much nicer to read.

Thanks.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!