From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: "Clément Léger" <clement.leger@bootlin.com>
Cc: "Andrew Lunn" <andrew@lunn.ch>,
"Vivien Didelot" <vivien.didelot@gmail.com>,
"Florian Fainelli" <f.fainelli@gmail.com>,
"Vladimir Oltean" <olteanv@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
"Rob Herring" <robh+dt@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Geert Uytterhoeven" <geert+renesas@glider.be>,
"Magnus Damm" <magnus.damm@gmail.com>,
"Heiner Kallweit" <hkallweit1@gmail.com>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Herve Codina" <herve.codina@bootlin.com>,
"Miquèl Raynal" <miquel.raynal@bootlin.com>,
"Milan Stevanovic" <milan.stevanovic@se.com>,
"Jimmy Lalande" <jimmy.lalande@se.com>,
"Pascal Eberhard" <pascal.eberhard@se.com>,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-renesas-soc@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH net-next v4 04/12] net: pcs: add Renesas MII converter driver
Date: Mon, 9 May 2022 21:20:30 +0100 [thread overview]
Message-ID: <Ynl3jpuJFqXLscvE@shell.armlinux.org.uk> (raw)
In-Reply-To: <20220509131900.7840-5-clement.leger@bootlin.com>
Hi,
On Mon, May 09, 2022 at 03:18:52PM +0200, Clément Léger wrote:
> +#define MIIC_PRCMD 0x0
> +#define MIIC_ESID_CODE 0x4
> +
> +#define MIIC_MODCTRL 0x20
> +#define MIIC_MODCTRL_SW_MODE GENMASK(4, 0)
> +
> +#define MIIC_CONVCTRL(port) (0x100 + (port) * 4)
> +
> +#define MIIC_CONVCTRL_CONV_SPEED GENMASK(1, 0)
> +#define CONV_MODE_10MBPS 0
> +#define CONV_MODE_100MBPS BIT(0)
> +#define CONV_MODE_1000MBPS BIT(1)
I think this is an inappropriate use of the BIT() macro. BIT() should be
used for single bit rather than for field values.
You seem to have a two bit field in bits 1 and 0 of a register, which
has the values of:
0 - 10MBPS
1 - 100MBPS
2 - 1GBPS
I'd guess 3 is listed as "undefined", "do not use" or something similar?
> +
> +#define MIIC_CONVCTRL_CONV_MODE GENMASK(3, 2)
> +#define CONV_MODE_MII 0
> +#define CONV_MODE_RMII BIT(0)
> +#define CONV_MODE_RGMII BIT(1)
This looks similar. a 2-bit field in bits 3 and 2 taking values:
0 - MII
1 - RMII
2 - RGMII
...
> +static int miic_config(struct phylink_pcs *pcs, unsigned int mode,
> + phy_interface_t interface,
> + const unsigned long *advertising, bool permit)
> +{
> + u32 speed = CONV_MODE_10MBPS, conv_mode = CONV_MODE_MII, val;
> + struct miic_port *miic_port = phylink_pcs_to_miic_port(pcs);
> + struct miic *miic = miic_port->miic;
> + int port = miic_port->port;
> +
> + switch (interface) {
> + case PHY_INTERFACE_MODE_RMII:
> + conv_mode = CONV_MODE_RMII;
> + speed = CONV_MODE_100MBPS;
> + break;
> + case PHY_INTERFACE_MODE_RGMII:
> + conv_mode = CONV_MODE_RGMII;
> + speed = CONV_MODE_1000MBPS;
> + break;
> + case PHY_INTERFACE_MODE_MII:
I'm not sure why you need to initialise "speed" and "conv_mode" above
when you could set them here.
Thanks.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
next prev parent reply other threads:[~2022-05-09 20:28 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-09 13:18 [PATCH net-next v4 00/12] add support for Renesas RZ/N1 ethernet subsystem devices Clément Léger
2022-05-09 13:18 ` [PATCH net-next v4 01/12] net: dsa: add support for ethtool get_rmon_stats() Clément Léger
2022-05-09 13:18 ` [PATCH net-next v4 02/12] net: dsa: add Renesas RZ/N1 switch tag driver Clément Léger
2022-05-09 15:52 ` Vladimir Oltean
2022-05-10 16:20 ` Florian Fainelli
2022-05-09 13:18 ` [PATCH net-next v4 03/12] dt-bindings: net: pcs: add bindings for Renesas RZ/N1 MII converter Clément Léger
2022-05-10 16:21 ` Florian Fainelli
2022-05-11 15:20 ` Rob Herring
2022-05-09 13:18 ` [PATCH net-next v4 04/12] net: pcs: add Renesas MII converter driver Clément Léger
2022-05-09 20:20 ` Russell King (Oracle) [this message]
2022-05-10 7:24 ` Clément Léger
2022-05-09 13:18 ` [PATCH net-next v4 05/12] dt-bindings: net: dsa: add bindings for Renesas RZ/N1 Advanced 5 port switch Clément Léger
2022-05-11 15:22 ` Rob Herring
2022-05-11 15:33 ` Vladimir Oltean
2022-05-18 1:59 ` Rob Herring
2022-05-18 12:05 ` Vladimir Oltean
2022-05-18 12:41 ` Clément Léger
2022-05-18 18:53 ` Rob Herring
2022-05-09 13:18 ` [PATCH net-next v4 06/12] net: dsa: rzn1-a5psw: add Renesas RZ/N1 advanced 5 port switch driver Clément Léger
2022-05-09 16:08 ` Vladimir Oltean
2022-05-10 8:34 ` Clément Léger
2022-05-11 9:36 ` Vladimir Oltean
2022-05-12 8:47 ` Clément Léger
2022-05-19 14:03 ` Clément Léger
2022-05-09 13:18 ` [PATCH net-next v4 07/12] net: dsa: rzn1-a5psw: add statistics support Clément Léger
2022-05-10 16:32 ` Florian Fainelli
2022-05-11 7:06 ` Clément Léger
2022-05-09 13:18 ` [PATCH net-next v4 08/12] net: dsa: rzn1-a5psw: add FDB support Clément Léger
2022-05-09 13:18 ` [PATCH net-next v4 09/12] ARM: dts: r9a06g032: describe MII converter Clément Léger
2022-05-09 13:18 ` [PATCH net-next v4 10/12] ARM: dts: r9a06g032: describe GMAC2 Clément Léger
2022-05-09 13:18 ` [PATCH net-next v4 11/12] ARM: dts: r9a06g032: describe switch Clément Léger
2022-05-09 13:19 ` [PATCH net-next v4 12/12] MAINTAINERS: add Renesas RZ/N1 switch related driver entry Clément Léger
2022-05-10 16:22 ` Florian Fainelli
2022-05-10 16:30 ` [PATCH net-next v4 00/12] add support for Renesas RZ/N1 ethernet subsystem devices Florian Fainelli
2022-05-11 7:08 ` Clément Léger
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