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net: dm9000: Allow instantiation using device tree
This patch adds Device Tree support to dm9000 driver. Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Reviewed-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com> Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
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26
Documentation/devicetree/bindings/net/davicom-dm9000.txt
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26
Documentation/devicetree/bindings/net/davicom-dm9000.txt
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@ -0,0 +1,26 @@
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Davicom DM9000 Fast Ethernet controller
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Required properties:
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- compatible = "davicom,dm9000";
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- reg : physical addresses and sizes of registers, must contain 2 entries:
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first entry : address register,
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second entry : data register.
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- interrupt-parent : interrupt controller to which the device is connected
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- interrupts : interrupt specifier specific to interrupt controller
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Optional properties:
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- local-mac-address : A bytestring of 6 bytes specifying Ethernet MAC address
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to use (from firmware or bootloader)
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- davicom,no-eeprom : Configuration EEPROM is not available
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- davicom,ext-phy : Use external PHY
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Example:
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ethernet@18000000 {
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compatible = "davicom,dm9000";
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reg = <0x18000000 0x2 0x18000004 0x2>;
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interrupt-parent = <&gpn>;
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interrupts = <7 4>;
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local-mac-address = [00 00 de ad be ef];
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davicom,no-eeprom;
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};
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@ -18,6 +18,7 @@ chrp Common Hardware Reference Platform
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cirrus Cirrus Logic, Inc.
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cortina Cortina Systems, Inc.
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dallas Maxim Integrated Products (formerly Dallas Semiconductor)
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davicom DAVICOM Semiconductor, Inc.
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denx Denx Software Engineering
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emmicro EM Microelectronic
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epson Seiko Epson Corp.
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@ -29,6 +29,8 @@
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#include <linux/spinlock.h>
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#include <linux/crc32.h>
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#include <linux/mii.h>
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#include <linux/of.h>
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#include <linux/of_net.h>
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#include <linux/ethtool.h>
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#include <linux/dm9000.h>
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#include <linux/delay.h>
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@ -1351,6 +1353,31 @@ static const struct net_device_ops dm9000_netdev_ops = {
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#endif
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};
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static struct dm9000_plat_data *dm9000_parse_dt(struct device *dev)
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{
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struct dm9000_plat_data *pdata;
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struct device_node *np = dev->of_node;
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const void *mac_addr;
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if (!IS_ENABLED(CONFIG_OF) || !np)
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return NULL;
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pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return ERR_PTR(-ENOMEM);
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if (of_find_property(np, "davicom,ext-phy", NULL))
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pdata->flags |= DM9000_PLATF_EXT_PHY;
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if (of_find_property(np, "davicom,no-eeprom", NULL))
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pdata->flags |= DM9000_PLATF_NO_EEPROM;
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mac_addr = of_get_mac_address(np);
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if (mac_addr)
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memcpy(pdata->dev_addr, mac_addr, sizeof(pdata->dev_addr));
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return pdata;
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}
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/*
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* Search DM9000 board, allocate space and register it
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*/
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@ -1366,6 +1393,12 @@ dm9000_probe(struct platform_device *pdev)
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int i;
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u32 id_val;
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if (!pdata) {
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pdata = dm9000_parse_dt(&pdev->dev);
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if (IS_ERR(pdata))
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return PTR_ERR(pdata);
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}
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/* Init network device */
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ndev = alloc_etherdev(sizeof(struct board_info));
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if (!ndev)
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@ -1676,11 +1709,20 @@ dm9000_drv_remove(struct platform_device *pdev)
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id dm9000_of_matches[] = {
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{ .compatible = "davicom,dm9000", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, dm9000_of_matches);
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#endif
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static struct platform_driver dm9000_driver = {
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.driver = {
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.name = "dm9000",
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.owner = THIS_MODULE,
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.pm = &dm9000_drv_pm_ops,
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.of_match_table = of_match_ptr(dm9000_of_matches),
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},
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.probe = dm9000_probe,
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.remove = dm9000_drv_remove,
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