linux-kernel - Re: [PATCH net-next v1 2/3] net: dsa: microchip: ksz8: Enable MIIM PHY Control reg access

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: <20231013154716.GP29570@kernel.org>
Date:   Fri, 13 Oct 2023 17:47:16 +0200
From:   Simon Horman <horms@...nel.org>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Heiner Kallweit <hkallweit1@...il.com>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, Russell King <linux@...linux.org.uk>,
        netdev@...r.kernel.org
Subject: Re: [PATCH net-next v1 2/3] net: dsa: microchip: ksz8: Enable MIIM
 PHY Control reg access

On Wed, Oct 11, 2023 at 02:38:55PM +0200, Oleksij Rempel wrote:
> Provide access to MIIM PHY Control register (Reg. 31) through
> ksz8_r_phy_ctrl() and ksz8_w_phy_ctrl() functions. Necessary for
> upcoming micrel.c patch to address forced link mode configuration.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> ---
>  drivers/net/dsa/microchip/ksz8795.c | 81 +++++++++++++++++++++++++++--
>  1 file changed, 78 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
> index 91aba470fb2f..11cb054cb54f 100644
> --- a/drivers/net/dsa/microchip/ksz8795.c
> +++ b/drivers/net/dsa/microchip/ksz8795.c
> @@ -632,6 +632,47 @@ static void ksz8_w_vlan_table(struct ksz_device *dev, u16 vid, u16 vlan)
>  	ksz8_w_table(dev, TABLE_VLAN, addr, buf);
>  }
>  
> +/**
> + * ksz8_r_phy_ctrl - Translates and reads from the SMI interface to a MIIM PHY
> + *		     Control register (Reg. 31).
> + * @dev: The KSZ device instance.
> + * @port: The port number to be read.

nit: please include an entry for @val here

> + *
> + * This function reads the SMI interface and translates the hardware register
> + * bit values into their corresponding control settings for a MIIM PHY Control
> + * register.
> + */
> +static int ksz8_r_phy_ctrl(struct ksz_device *dev, int port, u16 *val)

...