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From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Calvin Johnson <calvin.johnson@oss.nxp.com>
Cc: Jeremy Linton <jeremy.linton@arm.com>,
	Russell King - ARM Linux admin <linux@armlinux.org.uk>,
	Jon <jon@solid-run.com>,
	Cristi Sovaiala <cristian.sovaiala@nxp.com>,
	Ioana Ciornei <ioana.ciornei@nxp.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Madalin Bucur <madalin.bucur@oss.nxp.com>,
	netdev <netdev@vger.kernel.org>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	linux.cj@gmail.com, "David S. Miller" <davem@davemloft.net>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	Jakub Kicinski <kuba@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [net-next PATCH v2 1/3] net: phy: introduce find_phy_device()
Date: Wed, 1 Jul 2020 13:23:28 +0300
Message-ID: <CAHp75VdhuPsx0Kz8=NHxf6KtC0ff9oJWkSMEdNsLeMznEGLnqQ@mail.gmail.com> (raw)
In-Reply-To: <20200701061233.31120-2-calvin.johnson@oss.nxp.com>

On Wed, Jul 1, 2020 at 9:13 AM Calvin Johnson
<calvin.johnson@oss.nxp.com> wrote:
>
> The PHYs on a mdiobus are probed and registered using mdiobus_register().
> Later, for connecting these PHYs to MAC, the PHYs registered on the
> mdiobus have to be referenced.
>
> For each MAC node, a property "mdio-handle" is used to reference the
> MDIO bus on which the PHYs are registered. On getting hold of the MDIO
> bus, use find_phy_device() to get the PHY connected to the MAC.

...

> +       struct platform_device *pdev;

This...

> +       fwnode_mdio = fwnode_find_reference(fwnode, "mdio-handle", 0);
> +       dev = bus_find_device_by_fwnode(&platform_bus_type, fwnode_mdio);

> +       if (IS_ERR_OR_NULL(dev))

IS_ERR()?!

> +               return NULL;

> +       pdev =  to_platform_device(dev);
> +       mdio = platform_get_drvdata(pdev);

...and this can be simple:

mdio = dev_get_drvdata(dev);

> +       err = fwnode_property_read_u32(fwnode, "phy-channel", &addr);
> +       if (err < 0 || addr < 0 || addr >= PHY_MAX_ADDR)
> +               return NULL;

-- 
With Best Regards,
Andy Shevchenko

  reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-01  6:12 [net-next PATCH v2 0/3] ACPI support for dpaa2 MAC driver Calvin Johnson
2020-07-01  6:12 ` [net-next PATCH v2 1/3] net: phy: introduce find_phy_device() Calvin Johnson
2020-07-01 10:23   ` Andy Shevchenko [this message]
2020-07-01 13:24   ` Andrew Lunn
2020-07-01  6:12 ` [net-next PATCH v2 2/3] Documentation: ACPI: DSD: Document MDIO PHY Calvin Johnson
2020-07-01 10:27   ` Andy Shevchenko
2020-07-03 11:35     ` Calvin Johnson
2020-07-04 11:40       ` Andy Shevchenko
2020-07-01 13:16   ` Randy Dunlap
2020-07-01 13:30   ` Andrew Lunn
2020-07-01  6:12 ` [net-next PATCH v2 3/3] net: dpaa2-mac: Add ACPI support for DPAA2 MAC driver Calvin Johnson
2020-07-01 10:37   ` Andy Shevchenko
2020-07-02  8:48   ` Ioana Ciornei
2020-07-02  9:34     ` Andy Shevchenko

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