netdev - Re: [net-next PATCH v7 0/6] ACPI support for dpaa2 MAC driver.

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Message-ID: <cb465245-8691-c051-3d04-0eaa97532a27@arm.com>
Date:   Fri, 25 Sep 2020 14:39:21 +0100
From:   Grant Likely <grant.likely@....com>
To:     Calvin Johnson <calvin.johnson@....nxp.com>,
        Jeremy Linton <jeremy.linton@....com>,
        Russell King - ARM Linux admin <linux@...linux.org.uk>,
        Jon <jon@...id-run.com>,
        Cristi Sovaiala <cristian.sovaiala@....com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Madalin Bucur <madalin.bucur@....nxp.com>
Cc:     netdev@...r.kernel.org, linux.cj@...il.com,
        linux-acpi@...r.kernel.org, nd <nd@....com>
Subject: Re: [net-next PATCH v7 0/6] ACPI support for dpaa2 MAC driver.

On 15/07/2020 10:03, Calvin Johnson wrote:
>   This patch series provides ACPI support for dpaa2 MAC driver.
>   This also introduces ACPI mechanism to get PHYs registered on a
>   MDIO bus and provide them to be connected to MAC.
> 
>   Patch "net: dpaa2-mac: Add ACPI support for DPAA2 MAC driver" depends on
>   https://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/linux.git/commit/?h=acpi/for-next&id=c279c4cf5bcd3c55b4fb9709d9036cd1bfe3beb8
>   Remaining patches are independent of the above patch and can be applied without
>   any issues.
> 
>   Device Tree can be tested on LX2160A-RDB with the below change which is also
> available in the above referenced patches:

Hi Calvin,

In principle, I agree with adding PHY linkage to ACPI, and I sent a 
comment about how the PHYs should be referenced. Unfortunately changing 
that details requires pretty much the entire series to be rewritten 
(sorry!). I won't do any detailed review on patches 2-6 until I see the 
next version.

g.


> 
> --- a/drivers/bus/fsl-mc/fsl-mc-bus.c
> +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
> @@ -931,6 +931,7 @@ static int fsl_mc_bus_probe(struct platform_device *pdev)
>          if (error < 0)
>                  goto error_cleanup_mc_io;
> 
> +       mc_bus_dev->dev.fwnode = pdev->dev.fwnode;
>          mc->root_mc_bus_dev = mc_bus_dev;
>          return 0;
> 
> 
> Changes in v7:
> - remove unnecessary -ve check for u32 var
> - assign flags to phy_dev
> 
> Changes in v6:
> - change device_mdiobus_register() parameter position
> - improve documentation
> - change device_mdiobus_register() parameter position
> - clean up phylink_fwnode_phy_connect()
> 
> Changes in v5:
> - add description
> - clean up if else
> - rename phy_find_by_fwnode() to phy_find_by_mdio_handle()
> - add docment for phy_find_by_mdio_handle()
> - error out DT in phy_find_by_mdio_handle()
> - clean up err return
> - return -EINVAL for invalid fwnode
> 
> Changes in v4:
> - release fwnode_mdio after use
> - return ERR_PTR instead of NULL
> - introduce device_mdiobus_register()
> 
> Changes in v3:
> - cleanup based on v2 comments
> - Added description for more properties
> - Added MDIO node DSDT entry
> - introduce fwnode_mdio_find_bus()
> - renamed and improved phy_find_by_fwnode()
> - cleanup based on v2 comments
> - move code into phylink_fwnode_phy_connect()
> 
> Changes in v2:
> - clean up dpaa2_mac_get_node()
> - introduce find_phy_device()
> - use acpi_find_child_device()
> 
> Calvin Johnson (6):
>    Documentation: ACPI: DSD: Document MDIO PHY
>    net: phy: introduce device_mdiobus_register()
>    net/fsl: use device_mdiobus_register()
>    net: phy: introduce phy_find_by_mdio_handle()
>    phylink: introduce phylink_fwnode_phy_connect()
>    net: dpaa2-mac: Add ACPI support for DPAA2 MAC driver
> 
>   Documentation/firmware-guide/acpi/dsd/phy.rst | 90 +++++++++++++++++++
>   .../net/ethernet/freescale/dpaa2/dpaa2-mac.c  | 70 ++++++++-------
>   drivers/net/ethernet/freescale/xgmac_mdio.c   |  3 +-
>   drivers/net/phy/mdio_bus.c                    | 51 +++++++++++
>   drivers/net/phy/phy_device.c                  | 40 +++++++++
>   drivers/net/phy/phylink.c                     | 32 +++++++
>   include/linux/mdio.h                          |  1 +
>   include/linux/phy.h                           |  2 +
>   include/linux/phylink.h                       |  3 +
>   9 files changed, 260 insertions(+), 32 deletions(-)
>   create mode 100644 Documentation/firmware-guide/acpi/dsd/phy.rst
>