linux-kernel - Re: [RFC,v3,12/12] fsl/fman: Add FMan MAC driver

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Date:	Mon, 20 Jul 2015 12:16:15 +0000
From:	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>
To:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"igal.liberman@...escale.com" <igal.liberman@...escale.com>
CC:	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"madalin.bucur@...escale.com" <madalin.bucur@...escale.com>
Subject: Re: [RFC,v3,12/12] fsl/fman: Add FMan MAC driver

On Wed, 2015-04-29 at 12:29 +0300, Igal.Liberman wrote:
> From: Igal Liberman <Igal.Liberman@...escale.com>
> 
> This patch adds the Ethernet MAC driver support.
> 
> Signed-off-by: Igal Liberman <Igal.Liberman@...escale.com>
> ---
>  drivers/net/ethernet/freescale/fman/inc/mac.h     |  125 +++++
>  drivers/net/ethernet/freescale/fman/mac/Makefile  |    3 +-
>  drivers/net/ethernet/freescale/fman/mac/mac-api.c |  605 +++++++++++++++++++++
>  drivers/net/ethernet/freescale/fman/mac/mac.c     |  527 ++++++++++++++++++
>  4 files changed, 1259 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/net/ethernet/freescale/fman/inc/mac.h
>  create mode 100644 drivers/net/ethernet/freescale/fman/mac/mac-api.c
>  create mode 100644 drivers/net/ethernet/freescale/fman/mac/mac.c
> 
> diff --git a/drivers/net/ethernet/freescale/fman/inc/mac.h b/drivers/net/ethernet/freescale/fman/inc/mac.h
> new file mode 100644
> index 0000000..2d27331
> --- /dev/null
> +++ b/drivers/net/ethernet/freescale/fman/inc/mac.h
.....
> +	/* Get the rest of the PHY information */
> +	mac_dev->phy_node = of_parse_phandle(mac_node, "phy-handle", 0);
> +	if (!mac_dev->phy_node) {
> +		int sz;
> +		const u32 *phy_id = of_get_property(mac_node, "fixed-link",
> +							&sz);
> +		if (!phy_id || sz < sizeof(*phy_id)) {
> +			dev_err(dev, "No PHY (or fixed link) found\n");
> +			_errno = -EINVAL;
> +			goto _return_dev_set_drvdata;
> +		}
> +
> +		sprintf(mac_dev->fixed_bus_id, PHY_ID_FMT, "fixed-0",
> +			phy_id[0]);
> +	}

The above for fixed PHY does not work for me, changing it to does:

diff --git a/drivers/net/ethernet/freescale/fman/mac/mac.c b/drivers/net/ethernet/freescale/fman/mac/mac.c
index 4eb8f7c..a8be96a 100644
--- a/drivers/net/ethernet/freescale/fman/mac/mac.c
+++ b/drivers/net/ethernet/freescale/fman/mac/mac.c
@@ -42,6 +42,7 @@
 #include <linux/module.h>
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
+#include <linux/of_mdio.h>
 #include <linux/of_net.h>
 #include <linux/device.h>
 #include <linux/phy.h>
@@ -399,7 +400,7 @@ static int __cold mac_probe(struct platform_device *_of_dev)
 
        /* Get the rest of the PHY information */
        mac_dev->phy_node = of_parse_phandle(mac_node, "phy-handle", 0);
-       if (!mac_dev->phy_node) {
+       if (0 && !mac_dev->phy_node) {
                int sz;
                const u32 *phy_id = of_get_property(mac_node, "fixed-link",
                                                        &sz);
@@ -412,6 +413,16 @@ static int __cold mac_probe(struct platform_device *_of_dev)
                sprintf(mac_dev->fixed_bus_id, PHY_ID_FMT, "fixed-0",
                        phy_id[0]);
        }
+       if (!mac_dev->phy_node && of_phy_is_fixed_link(mac_node)) {
+               /*
+                * In the case of a fixed PHY, the DT node associated
+                * to the PHY is the Ethernet MAC DT node.
+                */
+               _errno = of_phy_register_fixed_link(mac_node);
+               if (_errno)
+                       return _errno;
+               mac_dev->phy_node = of_node_get(mac_node);
+       }--
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