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Message-Id: <1352052637-5154-1-git-send-email-plagnioj@jcrosoft.com>
Date: Sun, 4 Nov 2012 19:10:36 +0100
From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
To: linux-arm-kernel@...ts.infradead.org
Cc: devicetree-discuss@...ts.ozlabs.org,
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
Nicolas Ferre <nicolas.ferre@...el.com>,
Joachim Eastwood <manabian@...il.com>, netdev@...r.kernel.org
Subject: [PATCH 1/2] net: at91_ether: add dt support
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
Cc: Nicolas Ferre <nicolas.ferre@...el.com>
Cc: Joachim Eastwood <manabian@...il.com>
Cc: netdev@...r.kernel.org
---
.../devicetree/bindings/net/cdns-emac.txt | 23 +++++++
drivers/net/ethernet/cadence/at91_ether.c | 72 ++++++++++++++++++--
2 files changed, 88 insertions(+), 7 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/cdns-emac.txt
diff --git a/Documentation/devicetree/bindings/net/cdns-emac.txt b/Documentation/devicetree/bindings/net/cdns-emac.txt
new file mode 100644
index 0000000..45b8760
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/cdns-emac.txt
@@ -0,0 +1,23 @@
+* Cadence EMAC Ethernet controller
+
+Required properties:
+- compatible: Should be "cdns,[<chip>-]{emac}"
+ Use "cdns,at91rm9200-emac" Atmel at91rm9200 SoC.
+ or the generic form: "cdns,emac".
+- 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".
+
+Optional properties:
+- local-mac-address: 6 bytes, mac address
+
+Examples:
+
+ macb0: ethernet@...c4000 {
+ compatible = "cdns,atrm9200-emac";
+ reg = <0xfffc4000 0x4000>;
+ interrupts = <21>;
+ phy-mode = "rmii";
+ local-mac-address = [3a 0e 03 04 05 06];
+ };
diff --git a/drivers/net/ethernet/cadence/at91_ether.c b/drivers/net/ethernet/cadence/at91_ether.c
index 0d6392d..3e843b4 100644
--- a/drivers/net/ethernet/cadence/at91_ether.c
+++ b/drivers/net/ethernet/cadence/at91_ether.c
@@ -31,6 +31,9 @@
#include <linux/gfp.h>
#include <linux/phy.h>
#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_net.h>
#include "macb.h"
@@ -443,6 +446,49 @@ static const struct net_device_ops at91ether_netdev_ops = {
#endif
};
+#if defined(CONFIG_OF)
+static const struct of_device_id at91ether_dt_ids[] = {
+ { .compatible = "cdns,at91rm9200-emac" },
+ { .compatible = "cdns,emac" },
+ { /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, at91ether_dt_ids);
+
+static int at91ether_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 at91ether_get_hwaddr_dt(struct macb *bp)
+{
+ struct device_node *np = bp->pdev->dev.of_node;
+ if (np) {
+ const char *mac = of_get_mac_address(np);
+ if (mac) {
+ memcpy(bp->dev->dev_addr, mac, ETH_ALEN);
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+#else
+static int at91ether_get_phy_mode_dt(struct platform_device *pdev)
+{
+ return -ENODEV;
+}
+static int at91ether_get_hwaddr_dt(struct macb *bp)
+{
+ return -ENODEV;
+}
+#endif
+
/*
* Detect MAC & PHY and perform ethernet interface initialization
*/
@@ -466,7 +512,8 @@ static int __init at91ether_probe(struct platform_device *pdev)
lp = netdev_priv(dev);
lp->pdev = pdev;
lp->dev = dev;
- lp->board_data = *board_data;
+ if (board_data)
+ lp->board_data = *board_data;
spin_lock_init(&lp->lock);
dev->base_addr = regs->start; /* physical base address */
@@ -496,18 +543,28 @@ static int __init at91ether_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, dev);
SET_NETDEV_DEV(dev, &pdev->dev);
- get_mac_address(dev); /* Get ethernet address and store it in dev->dev_addr */
+ res = at91ether_get_hwaddr_dt(lp);
+ if (res < 0)
+ get_mac_address(dev); /* Get ethernet address and store it in dev->dev_addr */
+
update_mac_address(dev); /* Program ethernet address into MAC */
+ res = at91ether_get_phy_mode_dt(pdev);
+ if (res < 0) {
+ if (board_data && board_data->is_rmii)
+ lp->phy_interface = PHY_INTERFACE_MODE_RMII;
+ else
+ lp->phy_interface = PHY_INTERFACE_MODE_MII;
+ } else {
+ lp->phy_interface = res;
+ }
+
macb_writel(lp, NCR, 0);
- if (board_data->is_rmii) {
+ if (lp->phy_interface == PHY_INTERFACE_MODE_RMII)
macb_writel(lp, NCFGR, MACB_BF(CLK, MACB_CLK_DIV32) | MACB_BIT(BIG) | MACB_BIT(RM9200_RMII));
- lp->phy_interface = PHY_INTERFACE_MODE_RMII;
- } else {
+ else
macb_writel(lp, NCFGR, MACB_BF(CLK, MACB_CLK_DIV32) | MACB_BIT(BIG));
- lp->phy_interface = PHY_INTERFACE_MODE_MII;
- }
/* Register the network interface */
res = register_netdev(dev);
@@ -602,6 +659,7 @@ static struct platform_driver at91ether_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(at91ether_dt_ids),
},
};
--
1.7.10.4
--
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