net/fec: add device tree probe support
It adds device tree probe support for fec driver. Signed-off-by: Jason Liu <jason.hui@linaro.org> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Cc: David S. Miller <davem@davemloft.net> Cc: Grant Likely <grant.likely@secretlab.ca> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shawn Guo
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4157ef1b87
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ca2cc33392
24
Documentation/devicetree/bindings/net/fsl-fec.txt
Normal file
24
Documentation/devicetree/bindings/net/fsl-fec.txt
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@ -0,0 +1,24 @@
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* Freescale Fast Ethernet Controller (FEC)
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Required properties:
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- compatible : Should be "fsl,<soc>-fec"
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- reg : Address and length of the register set for the device
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- interrupts : Should contain fec interrupt
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- phy-mode : String, operation mode of the PHY interface.
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Supported values are: "mii", "gmii", "sgmii", "tbi", "rmii",
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"rgmii", "rgmii-id", "rgmii-rxid", "rgmii-txid", "rtbi", "smii".
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- phy-reset-gpios : Should specify the gpio for phy reset
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Optional properties:
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- local-mac-address : 6 bytes, mac address
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Example:
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fec@83fec000 {
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compatible = "fsl,imx51-fec", "fsl,imx27-fec";
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reg = <0x83fec000 0x4000>;
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interrupts = <87>;
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phy-mode = "mii";
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phy-reset-gpios = <&gpio1 14 0>; /* GPIO2_14 */
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local-mac-address = [00 04 9F 01 1B B9];
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};
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@ -44,6 +44,10 @@
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#include <linux/platform_device.h>
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#include <linux/phy.h>
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#include <linux/fec.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/of_net.h>
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#include <asm/cacheflush.h>
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@ -89,6 +93,20 @@ static struct platform_device_id fec_devtype[] = {
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};
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MODULE_DEVICE_TABLE(platform, fec_devtype);
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enum imx_fec_type {
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IMX25_FEC = 1, /* runs on i.mx25/50/53 */
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IMX27_FEC, /* runs on i.mx27/35/51 */
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IMX28_FEC,
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};
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static const struct of_device_id fec_dt_ids[] = {
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{ .compatible = "fsl,imx25-fec", .data = &fec_devtype[IMX25_FEC], },
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{ .compatible = "fsl,imx27-fec", .data = &fec_devtype[IMX27_FEC], },
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{ .compatible = "fsl,imx28-fec", .data = &fec_devtype[IMX28_FEC], },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, fec_dt_ids);
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static unsigned char macaddr[ETH_ALEN];
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module_param_array(macaddr, byte, NULL, 0);
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MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
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@ -748,8 +766,22 @@ static void __inline__ fec_get_mac(struct net_device *ndev)
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*/
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iap = macaddr;
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#ifdef CONFIG_OF
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/*
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* 2) from flash or fuse (via platform data)
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* 2) from device tree data
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*/
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if (!is_valid_ether_addr(iap)) {
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struct device_node *np = fep->pdev->dev.of_node;
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if (np) {
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const char *mac = of_get_mac_address(np);
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if (mac)
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iap = (unsigned char *) mac;
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}
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}
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#endif
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/*
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* 3) from flash or fuse (via platform data)
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*/
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if (!is_valid_ether_addr(iap)) {
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#ifdef CONFIG_M5272
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@ -762,7 +794,7 @@ static void __inline__ fec_get_mac(struct net_device *ndev)
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}
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/*
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* 3) FEC mac registers set by bootloader
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* 4) FEC mac registers set by bootloader
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*/
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if (!is_valid_ether_addr(iap)) {
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*((unsigned long *) &tmpaddr[0]) =
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@ -1368,6 +1400,52 @@ static int fec_enet_init(struct net_device *ndev)
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return 0;
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}
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#ifdef CONFIG_OF
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static int __devinit fec_get_phy_mode_dt(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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if (np)
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return of_get_phy_mode(np);
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return -ENODEV;
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}
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static int __devinit fec_reset_phy(struct platform_device *pdev)
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{
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int err, phy_reset;
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struct device_node *np = pdev->dev.of_node;
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if (!np)
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return -ENODEV;
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phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0);
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err = gpio_request_one(phy_reset, GPIOF_OUT_INIT_LOW, "phy-reset");
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if (err) {
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pr_warn("FEC: failed to get gpio phy-reset: %d\n", err);
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return err;
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}
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msleep(1);
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gpio_set_value(phy_reset, 1);
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return 0;
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}
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#else /* CONFIG_OF */
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static inline int fec_get_phy_mode_dt(struct platform_device *pdev)
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{
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return -ENODEV;
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}
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static inline int fec_reset_phy(struct platform_device *pdev)
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{
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/*
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* In case of platform probe, the reset has been done
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* by machine code.
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*/
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return 0;
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}
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#endif /* CONFIG_OF */
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static int __devinit
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fec_probe(struct platform_device *pdev)
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{
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@ -1376,6 +1454,11 @@ fec_probe(struct platform_device *pdev)
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struct net_device *ndev;
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int i, irq, ret = 0;
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struct resource *r;
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const struct of_device_id *of_id;
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of_id = of_match_device(fec_dt_ids, &pdev->dev);
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if (of_id)
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pdev->id_entry = of_id->data;
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r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!r)
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@ -1407,9 +1490,18 @@ fec_probe(struct platform_device *pdev)
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platform_set_drvdata(pdev, ndev);
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pdata = pdev->dev.platform_data;
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if (pdata)
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fep->phy_interface = pdata->phy;
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ret = fec_get_phy_mode_dt(pdev);
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if (ret < 0) {
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pdata = pdev->dev.platform_data;
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if (pdata)
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fep->phy_interface = pdata->phy;
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else
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fep->phy_interface = PHY_INTERFACE_MODE_MII;
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} else {
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fep->phy_interface = ret;
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}
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fec_reset_phy(pdev);
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/* This device has up to three irqs on some platforms */
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for (i = 0; i < 3; i++) {
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@ -1544,6 +1636,7 @@ static struct platform_driver fec_driver = {
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#ifdef CONFIG_PM
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.pm = &fec_pm_ops,
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#endif
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.of_match_table = fec_dt_ids,
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},
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.id_table = fec_devtype,
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.probe = fec_probe,
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