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Message-Id: <1344350092-24050-4-git-send-email-ian.molton@codethink.co.uk>
Date: Tue, 7 Aug 2012 15:34:48 +0100
From: Ian Molton <ian.molton@...ethink.co.uk>
To: linux-arm-kernel@...ts.infradead.org
Cc: andrew@...n.ch, thomas.petazzoni@...e-electrons.com,
ben.dooks@...ethink.co.uk, arnd@...db.de, netdev@...r.kernel.org
Subject: [PATCH v3 3/7] mv643xx.c: Add basic device tree support.
This patch adds basic device tree support to the mv643xx ethernet driver.
It should be enough for most current users of the device, and should allow
a painless migration.
Signed-off-by: Ian Molton <ian.molton@...ethink.co.uk>
---
Documentation/devicetree/bindings/net/mv643xx.txt | 75 +++++++++++++++++
drivers/net/ethernet/marvell/mv643xx_eth.c | 93 +++++++++++++++++++--
2 files changed, 161 insertions(+), 7 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/mv643xx.txt
diff --git a/Documentation/devicetree/bindings/net/mv643xx.txt b/Documentation/devicetree/bindings/net/mv643xx.txt
new file mode 100644
index 0000000..2727f79
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/mv643xx.txt
@@ -0,0 +1,75 @@
+mv643xx related nodes.
+
+marvell,mdio-mv643xx:
+
+Required properties:
+
+ - interrupts : <a> where a is the SMI interrupt number.
+ - reg : the base address and size of the controllers register space.
+
+Optional properties:
+ - shared_smi : on some chips, the second PHY is "shared", meaning it is
+ really accessed via the first SMI controller. It is passed in this
+ way due to the present structure of the driver, which requires the
+ base address for the MAC to be passed in via the SMI controllers
+ platform data.
+ - tx_csum_limit : on some devices, this option is required for proper
+ operation wrt. jumbo frames.
+
+
+Example:
+
+smi0: mdio@...00 {
+ compatible = "marvell,mdio-mv643xx";
+ reg = <0x72000 0x4000>;
+ interrupts = <46>;
+ tx_csum_limit = <1600>;
+ status = "disabled";
+};
+
+smi1: mdio@...00 {
+ compatible = "marvell,mdio-mv643xx";
+ reg = <0x76000 0x4000>;
+ interrupts = <47>;
+ shared_smi = <&smi0>;
+ tx_csum_limit = <1600>;
+ status = "disabled";
+};
+
+
+
+marvell,mv643xx-eth:
+
+Required properties:
+ - interrupts : the port interrupt number.
+ - mdio : phandle of the smi device as drescribed above
+
+Optional properties:
+ - port_number : the port number on this bus.
+ - phy_addr : the PHY address.
+ - reg : should match the mdio reg this device is attached to.
+ this is a required hack for now due to the way the
+ driver is constructed. This allows the device clock to be
+ kept running so that the MAC is not lost after boot.
+
+
+Example:
+
+egiga0 {
+ compatible = "marvell,mv643xx-eth";
+ reg = <0x72000 0x4000>;
+ mdio = <&smi0>;
+ port_number = <0>;
+ phy_addr = <0x80>;
+ interrupts = <11>;
+};
+
+egiga1 {
+ compatible = "marvell,mv643xx-eth";
+ reg = <0x76000 0x4000>;
+ mdio = <&smi1>;
+ port_number = <0>;
+ phy_addr = <0x81>;
+ interrupts = <15>;
+};
+
diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c
index 92497eb..bb80050 100644
--- a/drivers/net/ethernet/marvell/mv643xx_eth.c
+++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
@@ -48,6 +48,9 @@
#include <linux/ethtool.h>
#include <linux/platform_device.h>
#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_irq.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
@@ -2601,7 +2604,7 @@ static void infer_hw_params(struct mv643xx_eth_shared_private *msp)
static int mv643xx_eth_shared_probe(struct platform_device *pdev)
{
static int mv643xx_eth_version_printed;
- struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
+ struct mv643xx_eth_shared_platform_data *pd;
struct mv643xx_eth_shared_private *msp;
const struct mbus_dram_target_info *dram;
struct resource *res;
@@ -2625,6 +2628,26 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
if (msp->base == NULL)
goto out_free;
+ if (pdev->dev.of_node) {
+ struct device_node *np = NULL;
+
+ /* when all users of this driver use FDT, we can remove this */
+ pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+ if (!pd) {
+ dev_dbg(&pdev->dev, "Could not allocate platform data\n");
+ goto out_free;
+ }
+
+ of_property_read_u32(pdev->dev.of_node,
+ "tx_csum_limit", &pd->tx_csum_limit);
+
+ np = of_parse_phandle(pdev->dev.of_node, "shared_smi", 0);
+ if (np)
+ pd->shared_smi = of_find_device_by_node(np);
+
+ } else {
+ pd = pdev->dev.platform_data;
+ }
/*
* Set up and register SMI bus.
*/
@@ -2657,7 +2680,6 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res != NULL) {
int err;
-
err = request_irq(res->start, mv643xx_eth_err_irq,
IRQF_SHARED, "mv643xx_eth", msp);
if (!err) {
@@ -2675,6 +2697,10 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ?
pd->tx_csum_limit : 9 * 1024;
+
+ if (pdev->dev.of_node)
+ kfree(pd); /* If we created a fake pd, free it now */
+
infer_hw_params(msp);
platform_set_drvdata(pdev, msp);
@@ -2708,12 +2734,21 @@ static int mv643xx_eth_shared_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_OF
+static struct of_device_id mv_mdio_dt_ids[] __devinitdata = {
+ { .compatible = "marvell,mdio-mv643xx", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mv_mdio_dt_ids);
+#endif
+
static struct platform_driver mv643xx_eth_shared_driver = {
.probe = mv643xx_eth_shared_probe,
.remove = mv643xx_eth_shared_remove,
.driver = {
.name = MV643XX_ETH_SHARED_NAME,
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(mv_mdio_dt_ids),
},
};
@@ -2873,7 +2908,36 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
struct resource *res;
int err;
- pd = pdev->dev.platform_data;
+ if (pdev->dev.of_node) {
+ struct device_node *np = NULL;
+
+ /* when all users of this driver use FDT, we can remove this */
+ pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+ if (!pd) {
+ dev_dbg(&pdev->dev, "Could not allocate platform data\n");
+ return -ENOMEM;
+ }
+
+ of_property_read_u32(pdev->dev.of_node,
+ "port_number", &pd->port_number);
+
+ if (!of_property_read_u32(pdev->dev.of_node,
+ "phy_addr", &pd->phy_addr))
+ pd->phy_addr = MV643XX_ETH_PHY_ADDR(pd->phy_addr);
+ else
+ pd->phy_addr = MV643XX_ETH_PHY_ADDR_DEFAULT;
+
+ np = of_parse_phandle(pdev->dev.of_node, "mdio", 0);
+ if (np) {
+ pd->shared = of_find_device_by_node(np);
+ } else {
+ kfree(pd);
+ return -ENODEV;
+ }
+ } else {
+ pd = pdev->dev.platform_data;
+ }
+
if (pd == NULL) {
dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n");
return -ENODEV;
@@ -2881,12 +2945,15 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
if (pd->shared == NULL) {
dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n");
- return -ENODEV;
+ err = -ENODEV;
+ goto out_free_pd;
}
dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8);
- if (!dev)
- return -ENOMEM;
+ if (!dev) {
+ err = -ENOMEM;
+ goto out_free_pd;
+ }
mp = netdev_priv(dev);
platform_set_drvdata(pdev, mp);
@@ -2923,6 +2990,8 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
init_pscr(mp, pd->speed, pd->duplex);
+ if (pdev->dev.of_node)
+ kfree(pd); /* If we created a fake pd, free it now */
mib_counters_clear(mp);
@@ -2942,7 +3011,6 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
mp->rx_oom.data = (unsigned long)mp;
mp->rx_oom.function = oom_timer_wrapper;
-
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
BUG_ON(!res);
dev->irq = res->start;
@@ -2991,6 +3059,8 @@ out:
}
#endif
free_netdev(dev);
+out_free_pd:
+ kfree(pd);
return err;
}
@@ -3030,6 +3100,14 @@ static void mv643xx_eth_shutdown(struct platform_device *pdev)
port_reset(mp);
}
+#ifdef CONFIG_OF
+static struct of_device_id mv_eth_dt_ids[] __devinitdata = {
+ { .compatible = "marvell,mv643xx-eth", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mv_eth_dt_ids);
+#endif
+
static struct platform_driver mv643xx_eth_driver = {
.probe = mv643xx_eth_probe,
.remove = mv643xx_eth_remove,
@@ -3037,6 +3115,7 @@ static struct platform_driver mv643xx_eth_driver = {
.driver = {
.name = MV643XX_ETH_NAME,
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(mv_eth_dt_ids),
},
};
--
1.7.9.5
--
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