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Message-Id: <1358757475-21035-3-git-send-email-s.hauer@pengutronix.de>
Date: Mon, 21 Jan 2013 09:37:55 +0100
From: Sascha Hauer <s.hauer@...gutronix.de>
To: netdev@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org, shawn.guo@...aro.org,
davem@...emloft.net, Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH 2/2] net: fec: Add support for phys from devicetree
This adds support for specifying the phy for the fec driver through the
devicetree. Possible usecases are:
- The fec internal MDIO bus has multiple phys connected and a particular
one has to be chosen which is physically connected to the (RG)MII interface.
- The phy is connected to an external MDIO bus.
Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
---
Documentation/devicetree/bindings/net/fsl-fec.txt | 20 +++++++
drivers/net/ethernet/freescale/fec.c | 61 +++++++++++++--------
drivers/net/ethernet/freescale/fec.h | 1 +
3 files changed, 59 insertions(+), 23 deletions(-)
diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
index d536392..ec7060b 100644
--- a/Documentation/devicetree/bindings/net/fsl-fec.txt
+++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
@@ -15,6 +15,9 @@ Optional properties:
only if property "phy-reset-gpios" is available. Missing the property
will have the duration be 1 millisecond. Numbers greater than 1000 are
invalid and 1 millisecond will be used instead.
+- phy : a phandle for the PHY device used for the fec. Used to specify an
+ external phy or to specify a particular address if the mdio bus has multiple
+ phys on it.
Example:
@@ -26,3 +29,20 @@ ethernet@...ec000 {
phy-reset-gpios = <&gpio2 14 0>; /* GPIO2_14 */
local-mac-address = [00 04 9F 01 1B B9];
};
+
+Example with specific phy address:
+
+ethernet@...ec000 {
+ compatible = "fsl,imx51-fec", "fsl,imx27-fec";
+ reg = <0x83fec000 0x4000>;
+ interrupts = <87>;
+ phy-mode = "mii";
+ phy-reset-gpios = <&gpio2 14 0>; /* GPIO2_14 */
+ local-mac-address = [00 04 9F 01 1B B9];
+ phy = &phy3;
+
+ phy3: ethernet-phy@3 {
+ reg = <3>;
+ device_type = "ethernet-phy";
+ };
+};
diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c
index 2f86557..54a8506 100644
--- a/drivers/net/ethernet/freescale/fec.c
+++ b/drivers/net/ethernet/freescale/fec.c
@@ -48,6 +48,7 @@
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/of_net.h>
+#include <linux/of_mdio.h>
#include <linux/pinctrl/consumer.h>
#include <linux/regulator/consumer.h>
@@ -950,31 +951,38 @@ static int fec_enet_mii_probe(struct net_device *ndev)
fep->phy_dev = NULL;
- /* check for attached phy */
- for (phy_id = 0; (phy_id < PHY_MAX_ADDR); phy_id++) {
- if ((fep->mii_bus->phy_mask & (1 << phy_id)))
- continue;
- if (fep->mii_bus->phy_map[phy_id] == NULL)
- continue;
- if (fep->mii_bus->phy_map[phy_id]->phy_id == 0)
- continue;
- if (dev_id--)
- continue;
- strncpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE);
- break;
- }
+ if (fep->phy_node) {
+ phy_dev = of_phy_connect(ndev, fep->phy_node, &fec_enet_adjust_link, 0,
+ fep->phy_interface);
+ } else {
+ /* check for attached phy */
+ for (phy_id = 0; (phy_id < PHY_MAX_ADDR); phy_id++) {
+ if ((fep->mii_bus->phy_mask & (1 << phy_id)))
+ continue;
+ if (fep->mii_bus->phy_map[phy_id] == NULL)
+ continue;
+ if (fep->mii_bus->phy_map[phy_id]->phy_id == 0)
+ continue;
+ if (dev_id--)
+ continue;
+ strncpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE);
+ break;
+ }
+
+ if (phy_id >= PHY_MAX_ADDR) {
+ printk(KERN_INFO
+ "%s: no PHY, assuming direct connection to switch\n",
+ ndev->name);
+ strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE);
+ phy_id = 0;
+ }
+
+ snprintf(phy_name, sizeof(phy_name), PHY_ID_FMT, mdio_bus_id, phy_id);
- if (phy_id >= PHY_MAX_ADDR) {
- printk(KERN_INFO
- "%s: no PHY, assuming direct connection to switch\n",
- ndev->name);
- strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE);
- phy_id = 0;
+ phy_dev = phy_connect(ndev, phy_name, &fec_enet_adjust_link, 0,
+ fep->phy_interface);
}
- snprintf(phy_name, sizeof(phy_name), PHY_ID_FMT, mdio_bus_id, phy_id);
- phy_dev = phy_connect(ndev, phy_name, &fec_enet_adjust_link, 0,
- fep->phy_interface);
if (IS_ERR(phy_dev)) {
printk(KERN_ERR "%s: could not attach to PHY\n", ndev->name);
return PTR_ERR(phy_dev);
@@ -1076,7 +1084,12 @@ static int fec_enet_mii_init(struct platform_device *pdev)
for (i = 0; i < PHY_MAX_ADDR; i++)
fep->mii_bus->irq[i] = PHY_POLL;
- if (mdiobus_register(fep->mii_bus))
+ if (fep->phy_node)
+ err = of_mdiobus_register(fep->mii_bus, pdev->dev.of_node);
+ else
+ err = mdiobus_register(fep->mii_bus);
+
+ if (err)
goto err_out_free_mdio_irq;
mii_cnt++;
@@ -1493,6 +1506,8 @@ static int fec_probe_dt(struct fec_enet_private *fep)
fep->phy_interface = of_get_phy_mode(np);
+ fep->phy_node = of_parse_phandle(np, "phy", 0);
+
return -ENODEV;
}
diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index c5a3bc1..0120ea6 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -236,6 +236,7 @@ struct fec_enet_private {
/* Phylib and MDIO interface */
struct mii_bus *mii_bus;
struct phy_device *phy_dev;
+ struct device_node *phy_node;
int mii_timeout;
uint phy_speed;
phy_interface_t phy_interface;
--
1.7.10.4
--
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