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Date: Sat, 25 Jun 2011 02:04:35 +0800
From: Shawn Guo <shawn.guo@...aro.org>
To: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
linux-serial@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
patches@...aro.org, Shawn Guo <shawn.guo@...aro.org>,
Jason Liu <jason.hui@...aro.org>,
"David S. Miller" <davem@...emloft.net>
Subject: [PATCH v2 4/5] net/fec: add device tree support
It adds device tree data parsing support for fec driver.
Signed-off-by: Jason Liu <jason.hui@...aro.org>
Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
Cc: David S. Miller <davem@...emloft.net>
---
Documentation/devicetree/bindings/net/fsl-fec.txt | 22 ++++++
drivers/net/fec.c | 81 +++++++++++++++++++--
2 files changed, 98 insertions(+), 5 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/fsl-fec.txt
diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
new file mode 100644
index 0000000..345ecb6
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
@@ -0,0 +1,22 @@
+* Freescale Fast Ethernet Controller (FEC)
+
+Required properties:
+- compatible : should be "fsl,<soc>-fec"
+- reg : address and length of the register set for the device
+- interrupts : should contain fec interrupt
+- phy-mode : string, operation mode of the PHY interface.
+ Supported values are: "mii", "gmii", "sgmii", "tbi", "rmii",
+ "rgmii", "rgmii-id", "rgmii-rxid", "rgmii-txid", "rtbi".
+
+Optional properties:
+- local-mac-address : 6 bytes, mac address
+
+Example:
+
+fec@...ec000 {
+ compatible = "fsl,imx51-fec", "fsl,imx27-fec";
+ reg = <0x83fec000 0x4000>;
+ interrupts = <87>;
+ phy-mode = "mii";
+ local-mac-address = [00 04 9F 01 1B B9];
+};
diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index 885d8ba..16ac1dd 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -44,6 +44,8 @@
#include <linux/platform_device.h>
#include <linux/phy.h>
#include <linux/fec.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <asm/cacheflush.h>
@@ -78,6 +80,12 @@ static struct platform_device_id fec_devtype[] = {
{ }
};
+static const struct of_device_id fec_dt_ids[] = {
+ { .compatible = "fsl,imx27-fec", .data = &fec_devtype[0], },
+ { .compatible = "fsl,imx28-fec", .data = &fec_devtype[1], },
+ {},
+};
+
static unsigned char macaddr[ETH_ALEN];
module_param_array(macaddr, byte, NULL, 0);
MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
@@ -731,8 +739,23 @@ static void __inline__ fec_get_mac(struct net_device *ndev)
*/
iap = macaddr;
+#ifdef CONFIG_OF
+ /*
+ * 2) from device tree data
+ */
+ if (!is_valid_ether_addr(iap)) {
+ struct device_node *np = fep->pdev->dev.of_node;
+ if (np) {
+ const void *p = of_get_property(np,
+ "local-mac-address", NULL);
+ if (p)
+ iap = (unsigned char *) p;
+ }
+ }
+#endif
+
/*
- * 2) from flash or fuse (via platform data)
+ * 3) from flash or fuse (via platform data)
*/
if (!is_valid_ether_addr(iap)) {
#ifdef CONFIG_M5272
@@ -745,7 +768,7 @@ static void __inline__ fec_get_mac(struct net_device *ndev)
}
/*
- * 3) FEC mac registers set by bootloader
+ * 4) FEC mac registers set by bootloader
*/
if (!is_valid_ether_addr(iap)) {
*((unsigned long *) &tmpaddr[0]) =
@@ -1355,6 +1378,43 @@ static int fec_enet_init(struct net_device *ndev)
return 0;
}
+#ifdef CONFIG_OF
+static int __devinit fec_get_phy_mode_dt(struct net_device *ndev)
+{
+ struct fec_enet_private *fep = netdev_priv(ndev);
+ struct device_node *np = fep->pdev->dev.of_node;
+ const char *pm, *phy_modes[] = {
+ [PHY_INTERFACE_MODE_MII] = "mii",
+ [PHY_INTERFACE_MODE_GMII] = "gmii",
+ [PHY_INTERFACE_MODE_SGMII] = "sgmii",
+ [PHY_INTERFACE_MODE_TBI] = "tbi",
+ [PHY_INTERFACE_MODE_RMII] = "rmii",
+ [PHY_INTERFACE_MODE_RGMII] = "rgmii",
+ [PHY_INTERFACE_MODE_RGMII_ID] = "rgmii-id",
+ [PHY_INTERFACE_MODE_RGMII_RXID] = "rgmii-rxid",
+ [PHY_INTERFACE_MODE_RGMII_TXID] = "rgmii-txid",
+ [PHY_INTERFACE_MODE_RTBI] = "rtbi",
+ };
+
+ if (np) {
+ pm = of_get_property(np, "phy-mode", NULL);
+ if (pm) {
+ int i;
+ for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
+ if (!strcasecmp(pm, phy_modes[i]))
+ return i;
+ }
+ }
+
+ return -ENODEV;
+}
+#else
+static int __devinit fec_get_phy_mode_dt(struct net_device *ndev)
+{
+ return -ENODEV;
+}
+#endif
+
static int __devinit
fec_probe(struct platform_device *pdev)
{
@@ -1363,6 +1423,11 @@ fec_probe(struct platform_device *pdev)
struct net_device *ndev;
int i, irq, ret = 0;
struct resource *r;
+ const struct of_device_id *of_id;
+
+ of_id = of_match_device(fec_dt_ids, &pdev->dev);
+ if (of_id)
+ pdev->id_entry = (struct platform_device_id *) of_id->data;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r)
@@ -1394,9 +1459,14 @@ fec_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, ndev);
- pdata = pdev->dev.platform_data;
- if (pdata)
- fep->phy_interface = pdata->phy;
+ fep->phy_interface = fec_get_phy_mode_dt(ndev);
+ if (fep->phy_interface == -ENODEV) {
+ pdata = pdev->dev.platform_data;
+ if (pdata)
+ fep->phy_interface = pdata->phy;
+ else
+ fep->phy_interface = PHY_INTERFACE_MODE_MII;
+ }
/* This device has up to three irqs on some platforms */
for (i = 0; i < 3; i++) {
@@ -1531,6 +1601,7 @@ static struct platform_driver fec_driver = {
#ifdef CONFIG_PM
.pm = &fec_pm_ops,
#endif
+ .of_match_table = fec_dt_ids,
},
.id_table = fec_devtype,
.probe = fec_probe,
--
1.7.4.1
--
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