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Message-Id: <1322846050-4543-1-git-send-email-nicolas.ferre@atmel.com>
Date: Fri, 2 Dec 2011 18:14:10 +0100
From: Nicolas Ferre <nicolas.ferre@...el.com>
To: robherring2@...il.com, devicetree-discuss@...ts.ozlabs.org,
netdev@...r.kernel.org, plagnioj@...osoft.com
Cc: linux-arm-kernel@...ts.infradead.org, grant.likely@...retlab.ca,
linux-kernel@...r.kernel.org, jamie@...ieiles.com,
Nicolas Ferre <nicolas.ferre@...el.com>
Subject: [PATCH] net/macb: add DT support
From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
Allow the device tree to provide the mac address and the phy mode.
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
[nicolas.ferre@...el.com: change "compatible" node property, doc and DT hwaddr]
Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
Cc: Jamie Iles <jamie@...ieiles.com>
---
Documentation/devicetree/bindings/net/macb.txt | 22 +++++++
drivers/net/ethernet/cadence/macb.c | 71 +++++++++++++++++++++---
drivers/net/ethernet/cadence/macb.h | 2 +
3 files changed, 87 insertions(+), 8 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/macb.txt
diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
new file mode 100644
index 0000000..7f0b90a
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/macb.txt
@@ -0,0 +1,22 @@
+* Cadence MACB Ethernet controller
+
+Required properties:
+- compatible: Should be "cdns,[<chip>-]macb"
+ Use "cdns,at91sam9260-macb" Atmel at91sam9260 and at91sam9263 SoCs.
+ Use "cdns,at32ap7000-macb" for other 10/100 usage or use the generic form: "cdns,macb"
+- reg: Address and length of the register set for the device
+- interrupts: Should contain macb interrupt
+- phy-mode: String, operation mode of the PHY interface.
+ Supported values are: "mii", "rmii", "gmii", "rgmii".
+
+Optional properties:
+- local-mac-address: 6 bytes, mac address
+
+Examples:
+
+ macb0: ethernet@...c4000 {
+ compatible = "cdns,at32ap7000-macb";
+ reg = <0xfffc4000 0x4000>;
+ interrupts = <21>;
+ phy-mode = "rmii";
+ };
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index 64d6146..103c6e6 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -23,6 +23,8 @@
#include <linux/platform_data/macb.h>
#include <linux/platform_device.h>
#include <linux/phy.h>
+#include <linux/of_device.h>
+#include <linux/of_net.h>
#include "macb.h"
@@ -191,7 +193,6 @@ static int macb_mii_probe(struct net_device *dev)
{
struct macb *bp = netdev_priv(dev);
struct phy_device *phydev;
- struct macb_platform_data *pdata;
int ret;
phydev = phy_find_first(bp->mii_bus);
@@ -200,14 +201,11 @@ static int macb_mii_probe(struct net_device *dev)
return -1;
}
- pdata = bp->pdev->dev.platform_data;
/* TODO : add pin_irq */
/* attach the mac to the phy */
ret = phy_connect_direct(dev, phydev, &macb_handle_link_change, 0,
- pdata && pdata->is_rmii ?
- PHY_INTERFACE_MODE_RMII :
- PHY_INTERFACE_MODE_MII);
+ bp->phy_interface);
if (ret) {
netdev_err(dev, "Could not attach to PHY\n");
return ret;
@@ -1244,6 +1242,50 @@ static const struct net_device_ops macb_netdev_ops = {
#endif
};
+#if defined(CONFIG_OF)
+static const struct of_device_id macb_dt_ids[] = {
+ { .compatible = "cdns,at32ap7000-macb" },
+ { .compatible = "cdns,at91sam9260-macb" },
+ { .compatible = "cdns,macb" },
+ { /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, macb_dt_ids);
+
+static int __devinit macb_get_phy_mode_dt(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+
+ if (np)
+ return of_get_phy_mode(np);
+
+ return -ENODEV;
+}
+
+static int __devinit macb_get_hwaddr_dt(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ if (np) {
+ const char *mac = of_get_mac_address(np);
+ if (mac) {
+ memcpy(pdev->dev->dev_addr, mac, ETH_ALEN);
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+#else
+static int __devinit macb_get_phy_mode_dt(struct platform_device *pdev)
+{
+ return -ENODEV;
+}
+static int __devinit macb_get_hwaddr_dt(struct platform_device *pdev)
+{
+ return -ENODEV;
+}
+#endif
+
static int __init macb_probe(struct platform_device *pdev)
{
struct macb_platform_data *pdata;
@@ -1318,10 +1360,22 @@ static int __init macb_probe(struct platform_device *pdev)
config |= macb_dbw(bp);
macb_writel(bp, NCFGR, config);
- macb_get_hwaddr(bp);
- pdata = pdev->dev.platform_data;
+ err = macb_get_hwaddr_dt(pdev);
+ if (err < 0)
+ macb_get_hwaddr(bp);
+
+ err = macb_get_phy_mode_dt(pdev);
+ if (err < 0) {
+ pdata = pdev->dev.platform_data;
+ if (pdata && pdata->is_rmii)
+ bp->phy_interface = PHY_INTERFACE_MODE_RMII;
+ else
+ bp->phy_interface = PHY_INTERFACE_MODE_MII;
+ } else {
+ bp->phy_interface = err;
+ }
- if (pdata && pdata->is_rmii)
+ if (bp->phy_interface == PHY_INTERFACE_MODE_RMII)
#if defined(CONFIG_ARCH_AT91)
macb_or_gem_writel(bp, USRIO, (MACB_BIT(RMII) |
MACB_BIT(CLKEN)));
@@ -1444,6 +1498,7 @@ static struct platform_driver macb_driver = {
.driver = {
.name = "macb",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(macb_dt_ids),
},
};
diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
index 1931078..335e288 100644
--- a/drivers/net/ethernet/cadence/macb.h
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -532,6 +532,8 @@ struct macb {
unsigned int link;
unsigned int speed;
unsigned int duplex;
+
+ phy_interface_t phy_interface;
};
static inline bool macb_is_gem(struct macb *bp)
--
1.7.5.4
--
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