From: Andrew Lunn <andrew@lunn.ch>
To: Marcin Wojtas <mw@semihalf.com>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
davem@davemloft.net, kuba@kernel.org, linux@armlinux.org.uk,
jaz@semihalf.com, gjb@semihalf.com, upstream@semihalf.com,
Samer.El-Haj-Mahmoud@arm.com, jon@solid-run.com, tn@semihalf.com,
rjw@rjwysocki.net, lenb@kernel.org
Subject: Re: [net-next: PATCH v2 2/7] net: mdiobus: Introduce fwnode_mdbiobus_register()
Date: Wed, 16 Jun 2021 21:33:14 +0200 [thread overview]
Message-ID: <YMpR+lJqcgQU2DMO@lunn.ch> (raw)
In-Reply-To: <20210616190759.2832033-3-mw@semihalf.com>
On Wed, Jun 16, 2021 at 09:07:54PM +0200, Marcin Wojtas wrote:
> This patch introduces a new helper function that
> wraps acpi_/of_ mdiobus_register() and allows its
> usage via common fwnode_ interface.
>
> Fall back to raw mdiobus_register() in case CONFIG_FWNODE_MDIO
> is not enabled, in order to satisfy compatibility
> in all future user drivers.
> Signed-off-by: Marcin Wojtas <mw@semihalf.com>
> ---
> include/linux/fwnode_mdio.h | 12 +++++++++++
> drivers/net/mdio/fwnode_mdio.c | 22 ++++++++++++++++++++
> 2 files changed, 34 insertions(+)
>
> diff --git a/include/linux/fwnode_mdio.h b/include/linux/fwnode_mdio.h
> index faf603c48c86..13d4ae8fee0a 100644
> --- a/include/linux/fwnode_mdio.h
> +++ b/include/linux/fwnode_mdio.h
> @@ -16,6 +16,7 @@ int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio,
> int fwnode_mdiobus_register_phy(struct mii_bus *bus,
> struct fwnode_handle *child, u32 addr);
>
> +int fwnode_mdiobus_register(struct mii_bus *bus, struct fwnode_handle *fwnode);
> #else /* CONFIG_FWNODE_MDIO */
> int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio,
> struct phy_device *phy,
> @@ -30,6 +31,17 @@ static inline int fwnode_mdiobus_register_phy(struct mii_bus *bus,
> {
> return -EINVAL;
> }
> +
> +static inline int fwnode_mdiobus_register(struct mii_bus *bus,
> + struct fwnode_handle *fwnode)
> +{
> + /*
> + * Fall back to mdiobus_register() function to register a bus.
> + * This way, we don't have to keep compat bits around in drivers.
> + */
> +
> + return mdiobus_register(mdio);
> +}
I'm not sure this fallback is correct.
Any driver which decides to use fwmode is going to select it. If it is
not selected, you want a link time error, or a compiler time error to
tell you, you are missing FWNODE_MDIO. Calling mdiobus_register() is
unlikely to work, or the driver would of done that directly.
Andrew
next prev parent reply other threads:[~2021-06-16 19:33 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-16 19:07 [net-next: PATCH v2 0/7] ACPI MDIO support for Marvell controllers Marcin Wojtas
2021-06-16 19:07 ` [net-next: PATCH v2 1/7] Documentation: ACPI: DSD: describe additional MAC configuration Marcin Wojtas
2021-06-16 19:07 ` [net-next: PATCH v2 2/7] net: mdiobus: Introduce fwnode_mdbiobus_register() Marcin Wojtas
2021-06-16 19:33 ` Andrew Lunn [this message]
2021-06-16 23:50 ` Marcin Wojtas
2021-06-17 12:59 ` Andrew Lunn
2021-06-16 19:07 ` [net-next: PATCH v2 3/7] net/fsl: switch to fwnode_mdiobus_register Marcin Wojtas
2021-06-16 19:35 ` Andrew Lunn
2021-06-16 23:39 ` Marcin Wojtas
2021-06-17 12:27 ` Andrew Lunn
2021-06-17 13:22 ` Marcin Wojtas
2021-06-16 19:07 ` [net-next: PATCH v2 4/7] net: mvmdio: simplify clock handling Marcin Wojtas
2021-06-16 19:48 ` Andrew Lunn
2021-06-16 23:25 ` Marcin Wojtas
2021-06-17 7:28 ` Andy Shevchenko
2021-06-16 19:07 ` [net-next: PATCH v2 5/7] net: mvmdio: add ACPI support Marcin Wojtas
2021-06-16 19:51 ` Andrew Lunn
2021-06-16 22:37 ` Marcin Wojtas
2021-06-16 23:01 ` Andrew Lunn
2021-06-16 19:07 ` [net-next: PATCH v2 6/7] net: mvpp2: enable using phylink with ACPI Marcin Wojtas
2021-06-16 19:07 ` [net-next: PATCH v2 7/7] net: mvpp2: remove unused 'has_phy' field Marcin Wojtas
2021-06-16 19:54 ` Andrew Lunn
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