diff options
| author | Mugunthan V N <mugunthanvnm@ti.com> | 2012-08-06 09:05:57 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-08 03:24:55 +0400 |
| commit | ec03e6a89e5168c92581a769681207c29ad2030f (patch) | |
| tree | f2a3a44726091809c12151209c9ab7c30e1304fb /drivers | |
| parent | aae06bf5f90403554f8d4ff83810a8281aef7f03 (diff) | |
| download | linux-ec03e6a89e5168c92581a769681207c29ad2030f.tar.xz | |
drivers: net: ethernet: davince_mdio: device tree implementation
device tree implementation for davinci mdio driver
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/ti/davinci_mdio.c | 41 |
1 files changed, 37 insertions, 4 deletions
diff --git a/drivers/net/ethernet/ti/davinci_mdio.c b/drivers/net/ethernet/ti/davinci_mdio.c index cd7ee204e94a..573f3be5f421 100644 --- a/drivers/net/ethernet/ti/davinci_mdio.c +++ b/drivers/net/ethernet/ti/davinci_mdio.c @@ -36,6 +36,8 @@ #include <linux/io.h> #include <linux/pm_runtime.h> #include <linux/davinci_emac.h> +#include <linux/of.h> +#include <linux/of_device.h> /* * This timeout definition is a worst-case ultra defensive measure against @@ -289,6 +291,25 @@ static int davinci_mdio_write(struct mii_bus *bus, int phy_id, return 0; } +static int davinci_mdio_probe_dt(struct mdio_platform_data *data, + struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + u32 prop; + + if (!node) + return -EINVAL; + + if (of_property_read_u32(node, "bus_freq", &prop)) { + pr_err("Missing bus_freq property in the DT.\n"); + return -EINVAL; + } + data->bus_freq = prop; + + return 0; +} + + static int __devinit davinci_mdio_probe(struct platform_device *pdev) { struct mdio_platform_data *pdata = pdev->dev.platform_data; @@ -304,8 +325,6 @@ static int __devinit davinci_mdio_probe(struct platform_device *pdev) return -ENOMEM; } - data->pdata = pdata ? (*pdata) : default_pdata; - data->bus = mdiobus_alloc(); if (!data->bus) { dev_err(dev, "failed to alloc mii bus\n"); @@ -313,14 +332,22 @@ static int __devinit davinci_mdio_probe(struct platform_device *pdev) goto bail_out; } + if (dev->of_node) { + if (davinci_mdio_probe_dt(&data->pdata, pdev)) + data->pdata = default_pdata; + snprintf(data->bus->id, MII_BUS_ID_SIZE, "%s", pdev->name); + } else { + data->pdata = pdata ? (*pdata) : default_pdata; + snprintf(data->bus->id, MII_BUS_ID_SIZE, "%s-%x", + pdev->name, pdev->id); + } + data->bus->name = dev_name(dev); data->bus->read = davinci_mdio_read, data->bus->write = davinci_mdio_write, data->bus->reset = davinci_mdio_reset, data->bus->parent = dev; data->bus->priv = data; - snprintf(data->bus->id, MII_BUS_ID_SIZE, "%s-%x", - pdev->name, pdev->id); pm_runtime_enable(&pdev->dev); pm_runtime_get_sync(&pdev->dev); @@ -454,11 +481,17 @@ static const struct dev_pm_ops davinci_mdio_pm_ops = { .resume = davinci_mdio_resume, }; +static const struct of_device_id davinci_mdio_of_mtable[] = { + { .compatible = "ti,davinci_mdio", }, + { /* sentinel */ }, +}; + static struct platform_driver davinci_mdio_driver = { .driver = { .name = "davinci_mdio", .owner = THIS_MODULE, .pm = &davinci_mdio_pm_ops, + .of_match_table = of_match_ptr(davinci_mdio_of_mtable), }, .probe = davinci_mdio_probe, .remove = __devexit_p(davinci_mdio_remove), |