1 files changed, 731 insertions, 0 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
new file mode 100644
index 000000000..9762e687f
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -0,0 +1,731 @@
+/*******************************************************************************
+  This contains the functions to handle the platform driver.
+
+  Copyright (C) 2007-2011  STMicroelectronics Ltd
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+  more details.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+*******************************************************************************/
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
+#include <linux/of_device.h>
+#include <linux/of_mdio.h>
+
+#include "stmmac.h"
+#include "stmmac_platform.h"
+
+#ifdef CONFIG_OF
+
+/**
+ * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins
+ * @mcast_bins: Multicast filtering bins
+ * Description:
+ * this function validates the number of Multicast filtering bins specified
+ * by the configuration through the device tree. The Synopsys GMAC supports
+ * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC
+ * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds
+ * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is
+ * invalid and will cause the filtering algorithm to use Multicast
+ * promiscuous mode.
+ */
+static int dwmac1000_validate_mcast_bins(int mcast_bins)
+{
+	int x = mcast_bins;
+
+	switch (x) {
+	case HASH_TABLE_SIZE:
+	case 128:
+	case 256:
+		break;
+	default:
+		x = 0;
+		pr_info("Hash table entries set to unexpected value %d",
+			mcast_bins);
+		break;
+	}
+	return x;
+}
+
+/**
+ * dwmac1000_validate_ucast_entries - validate the Unicast address entries
+ * @ucast_entries: number of Unicast address entries
+ * Description:
+ * This function validates the number of Unicast address entries supported
+ * by a particular Synopsys 10/100/1000 controller. The Synopsys controller
+ * supports 1..32, 64, or 128 Unicast filter entries for it's Unicast filter
+ * logic. This function validates a valid, supported configuration is
+ * selected, and defaults to 1 Unicast address if an unsupported
+ * configuration is selected.
+ */
+static int dwmac1000_validate_ucast_entries(int ucast_entries)
+{
+	int x = ucast_entries;
+
+	switch (x) {
+	case 1 ... 32:
+	case 64:
+	case 128:
+		break;
+	default:
+		x = 1;
+		pr_info("Unicast table entries set to unexpected value %d\n",
+			ucast_entries);
+		break;
+	}
+	return x;
+}
+
+/**
+ * stmmac_axi_setup - parse DT parameters for programming the AXI register
+ * @pdev: platform device
+ * Description:
+ * if required, from device-tree the AXI internal register can be tuned
+ * by using platform parameters.
+ */
+static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev)
+{
+	struct device_node *np;
+	struct stmmac_axi *axi;
+
+	np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0);
+	if (!np)
+		return NULL;
+
+	axi = devm_kzalloc(&pdev->dev, sizeof(*axi), GFP_KERNEL);
+	if (!axi) {
+		of_node_put(np);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en");
+	axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm");
+	axi->axi_kbbe = of_property_read_bool(np, "snps,axi_kbbe");
+	axi->axi_fb = of_property_read_bool(np, "snps,axi_fb");
+	axi->axi_mb = of_property_read_bool(np, "snps,axi_mb");
+	axi->axi_rb =  of_property_read_bool(np, "snps,axi_rb");
+
+	if (of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt))
+		axi->axi_wr_osr_lmt = 1;
+	if (of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt))
+		axi->axi_rd_osr_lmt = 1;
+	of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN);
+	of_node_put(np);
+
+	return axi;
+}
+
+/**
+ * stmmac_mtl_setup - parse DT parameters for multiple queues configuration
+ * @pdev: platform device
+ */
+static int stmmac_mtl_setup(struct platform_device *pdev,
+			    struct plat_stmmacenet_data *plat)
+{
+	struct device_node *q_node;
+	struct device_node *rx_node;
+	struct device_node *tx_node;
+	u8 queue = 0;
+	int ret = 0;
+
+	/* For backwards-compatibility with device trees that don't have any
+	 * snps,mtl-rx-config or snps,mtl-tx-config properties, we fall back
+	 * to one RX and TX queues each.
+	 */
+	plat->rx_queues_to_use = 1;
+	plat->tx_queues_to_use = 1;
+
+	/* First Queue must always be in DCB mode. As MTL_QUEUE_DCB = 1 we need
+	 * to always set this, otherwise Queue will be classified as AVB
+	 * (because MTL_QUEUE_AVB = 0).
+	 */
+	plat->rx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
+	plat->tx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
+
+	rx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-rx-config", 0);
+	if (!rx_node)
+		return ret;
+
+	tx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-tx-config", 0);
+	if (!tx_node) {
+		of_node_put(rx_node);
+		return ret;
+	}
+
+	/* Processing RX queues common config */
+	if (of_property_read_u32(rx_node, "snps,rx-queues-to-use",
+				 &plat->rx_queues_to_use))
+		plat->rx_queues_to_use = 1;
+
+	if (of_property_read_bool(rx_node, "snps,rx-sched-sp"))
+		plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
+	else if (of_property_read_bool(rx_node, "snps,rx-sched-wsp"))
+		plat->rx_sched_algorithm = MTL_RX_ALGORITHM_WSP;
+	else
+		plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
+
+	/* Processing individual RX queue config */
+	for_each_child_of_node(rx_node, q_node) {
+		if (queue >= plat->rx_queues_to_use)
+			break;
+
+		if (of_property_read_bool(q_node, "snps,dcb-algorithm"))
+			plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
+		else if (of_property_read_bool(q_node, "snps,avb-algorithm"))
+			plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
+		else
+			plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
+
+		if (of_property_read_u32(q_node, "snps,map-to-dma-channel",
+					 &plat->rx_queues_cfg[queue].chan))
+			plat->rx_queues_cfg[queue].chan = queue;
+		/* TODO: Dynamic mapping to be included in the future */
+
+		if (of_property_read_u32(q_node, "snps,priority",
+					&plat->rx_queues_cfg[queue].prio)) {
+			plat->rx_queues_cfg[queue].prio = 0;
+			plat->rx_queues_cfg[queue].use_prio = false;
+		} else {
+			plat->rx_queues_cfg[queue].use_prio = true;
+		}
+
+		/* RX queue specific packet type routing */
+		if (of_property_read_bool(q_node, "snps,route-avcp"))
+			plat->rx_queues_cfg[queue].pkt_route = PACKET_AVCPQ;
+		else if (of_property_read_bool(q_node, "snps,route-ptp"))
+			plat->rx_queues_cfg[queue].pkt_route = PACKET_PTPQ;
+		else if (of_property_read_bool(q_node, "snps,route-dcbcp"))
+			plat->rx_queues_cfg[queue].pkt_route = PACKET_DCBCPQ;
+		else if (of_property_read_bool(q_node, "snps,route-up"))
+			plat->rx_queues_cfg[queue].pkt_route = PACKET_UPQ;
+		else if (of_property_read_bool(q_node, "snps,route-multi-broad"))
+			plat->rx_queues_cfg[queue].pkt_route = PACKET_MCBCQ;
+		else
+			plat->rx_queues_cfg[queue].pkt_route = 0x0;
+
+		queue++;
+	}
+	if (queue != plat->rx_queues_to_use) {
+		ret = -EINVAL;
+		dev_err(&pdev->dev, "Not all RX queues were configured\n");
+		goto out;
+	}
+
+	/* Processing TX queues common config */
+	if (of_property_read_u32(tx_node, "snps,tx-queues-to-use",
+				 &plat->tx_queues_to_use))
+		plat->tx_queues_to_use = 1;
+
+	if (of_property_read_bool(tx_node, "snps,tx-sched-wrr"))
+		plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR;
+	else if (of_property_read_bool(tx_node, "snps,tx-sched-wfq"))
+		plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WFQ;
+	else if (of_property_read_bool(tx_node, "snps,tx-sched-dwrr"))
+		plat->tx_sched_algorithm = MTL_TX_ALGORITHM_DWRR;
+	else if (of_property_read_bool(tx_node, "snps,tx-sched-sp"))
+		plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
+	else
+		plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
+
+	queue = 0;
+
+	/* Processing individual TX queue config */
+	for_each_child_of_node(tx_node, q_node) {
+		if (queue >= plat->tx_queues_to_use)
+			break;
+
+		if (of_property_read_u32(q_node, "snps,weight",
+					 &plat->tx_queues_cfg[queue].weight))
+			plat->tx_queues_cfg[queue].weight = 0x10 + queue;
+
+		if (of_property_read_bool(q_node, "snps,dcb-algorithm")) {
+			plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
+		} else if (of_property_read_bool(q_node,
+						 "snps,avb-algorithm")) {
+			plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
+
+			/* Credit Base Shaper parameters used by AVB */
+			if (of_property_read_u32(q_node, "snps,send_slope",
+				&plat->tx_queues_cfg[queue].send_slope))
+				plat->tx_queues_cfg[queue].send_slope = 0x0;
+			if (of_property_read_u32(q_node, "snps,idle_slope",
+				&plat->tx_queues_cfg[queue].idle_slope))
+				plat->tx_queues_cfg[queue].idle_slope = 0x0;
+			if (of_property_read_u32(q_node, "snps,high_credit",
+				&plat->tx_queues_cfg[queue].high_credit))
+				plat->tx_queues_cfg[queue].high_credit = 0x0;
+			if (of_property_read_u32(q_node, "snps,low_credit",
+				&plat->tx_queues_cfg[queue].low_credit))
+				plat->tx_queues_cfg[queue].low_credit = 0x0;
+		} else {
+			plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
+		}
+
+		if (of_property_read_u32(q_node, "snps,priority",
+					&plat->tx_queues_cfg[queue].prio)) {
+			plat->tx_queues_cfg[queue].prio = 0;
+			plat->tx_queues_cfg[queue].use_prio = false;
+		} else {
+			plat->tx_queues_cfg[queue].use_prio = true;
+		}
+
+		queue++;
+	}
+	if (queue != plat->tx_queues_to_use) {
+		ret = -EINVAL;
+		dev_err(&pdev->dev, "Not all TX queues were configured\n");
+		goto out;
+	}
+
+out:
+	of_node_put(rx_node);
+	of_node_put(tx_node);
+	of_node_put(q_node);
+
+	return ret;
+}
+
+/**
+ * stmmac_dt_phy - parse device-tree driver parameters to allocate PHY resources
+ * @plat: driver data platform structure
+ * @np: device tree node
+ * @dev: device pointer
+ * Description:
+ * The mdio bus will be allocated in case of a phy transceiver is on board;
+ * it will be NULL if the fixed-link is configured.
+ * If there is the "snps,dwmac-mdio" sub-node the mdio will be allocated
+ * in any case (for DSA, mdio must be registered even if fixed-link).
+ * The table below sums the supported configurations:
+ *	-------------------------------
+ *	snps,phy-addr	|     Y
+ *	-------------------------------
+ *	phy-handle	|     Y
+ *	-------------------------------
+ *	fixed-link	|     N
+ *	-------------------------------
+ *	snps,dwmac-mdio	|
+ *	  even if	|     Y
+ *	fixed-link	|
+ *	-------------------------------
+ *
+ * It returns 0 in case of success otherwise -ENODEV.
+ */
+static int stmmac_dt_phy(struct plat_stmmacenet_data *plat,
+			 struct device_node *np, struct device *dev)
+{
+	bool mdio = true;
+	static const struct of_device_id need_mdio_ids[] = {
+		{ .compatible = "snps,dwc-qos-ethernet-4.10" },
+		{},
+	};
+
+	/* If phy-handle property is passed from DT, use it as the PHY */
+	plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
+	if (plat->phy_node)
+		dev_dbg(dev, "Found phy-handle subnode\n");
+
+	/* If phy-handle is not specified, check if we have a fixed-phy */
+	if (!plat->phy_node && of_phy_is_fixed_link(np)) {
+		if ((of_phy_register_fixed_link(np) < 0))
+			return -ENODEV;
+
+		dev_dbg(dev, "Found fixed-link subnode\n");
+		plat->phy_node = of_node_get(np);
+		mdio = false;
+	}
+
+	if (of_match_node(need_mdio_ids, np)) {
+		plat->mdio_node = of_get_child_by_name(np, "mdio");
+	} else {
+		/**
+		 * If snps,dwmac-mdio is passed from DT, always register
+		 * the MDIO
+		 */
+		for_each_child_of_node(np, plat->mdio_node) {
+			if (of_device_is_compatible(plat->mdio_node,
+						    "snps,dwmac-mdio"))
+				break;
+		}
+	}
+
+	if (plat->mdio_node) {
+		dev_dbg(dev, "Found MDIO subnode\n");
+		mdio = true;
+	}
+
+	if (mdio)
+		plat->mdio_bus_data =
+			devm_kzalloc(dev, sizeof(struct stmmac_mdio_bus_data),
+				     GFP_KERNEL);
+	return 0;
+}
+
+/**
+ * stmmac_probe_config_dt - parse device-tree driver parameters
+ * @pdev: platform_device structure
+ * @mac: MAC address to use
+ * Description:
+ * this function is to read the driver parameters from device-tree and
+ * set some private fields that will be used by the main at runtime.
+ */
+struct plat_stmmacenet_data *
+stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct plat_stmmacenet_data *plat;
+	struct stmmac_dma_cfg *dma_cfg;
+	int rc;
+
+	plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
+	if (!plat)
+		return ERR_PTR(-ENOMEM);
+
+	*mac = of_get_mac_address(np);
+	plat->interface = of_get_phy_mode(np);
+
+	/* Get max speed of operation from device tree */
+	of_property_read_u32(np, "max-speed", &plat->max_speed);
+
+	plat->bus_id = of_alias_get_id(np, "ethernet");
+	if (plat->bus_id < 0)
+		plat->bus_id = 0;
+
+	/* Default to phy auto-detection */
+	plat->phy_addr = -1;
+
+	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
+	 * and warn of its use. Remove this when phy node support is added.
+	 */
+	if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
+		dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
+
+	/* To Configure PHY by using all device-tree supported properties */
+	rc = stmmac_dt_phy(plat, np, &pdev->dev);
+	if (rc)
+		return ERR_PTR(rc);
+
+	of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
+
+	of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
+
+	plat->force_sf_dma_mode =
+		of_property_read_bool(np, "snps,force_sf_dma_mode");
+
+	plat->en_tx_lpi_clockgating =
+		of_property_read_bool(np, "snps,en-tx-lpi-clockgating");
+
+	/* Set the maxmtu to a default of JUMBO_LEN in case the
+	 * parameter is not present in the device tree.
+	 */
+	plat->maxmtu = JUMBO_LEN;
+
+	/* Set default value for multicast hash bins */
+	plat->multicast_filter_bins = HASH_TABLE_SIZE;
+
+	/* Set default value for unicast filter entries */
+	plat->unicast_filter_entries = 1;
+
+	/*
+	 * Currently only the properties needed on SPEAr600
+	 * are provided. All other properties should be added
+	 * once needed on other platforms.
+	 */
+	if (of_device_is_compatible(np, "st,spear600-gmac") ||
+		of_device_is_compatible(np, "snps,dwmac-3.50a") ||
+		of_device_is_compatible(np, "snps,dwmac-3.70a") ||
+		of_device_is_compatible(np, "snps,dwmac")) {
+		/* Note that the max-frame-size parameter as defined in the
+		 * ePAPR v1.1 spec is defined as max-frame-size, it's
+		 * actually used as the IEEE definition of MAC Client
+		 * data, or MTU. The ePAPR specification is confusing as
+		 * the definition is max-frame-size, but usage examples
+		 * are clearly MTUs
+		 */
+		of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
+		of_property_read_u32(np, "snps,multicast-filter-bins",
+				     &plat->multicast_filter_bins);
+		of_property_read_u32(np, "snps,perfect-filter-entries",
+				     &plat->unicast_filter_entries);
+		plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
+					       plat->unicast_filter_entries);
+		plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
+					      plat->multicast_filter_bins);
+		plat->has_gmac = 1;
+		plat->pmt = 1;
+	}
+
+	if (of_device_is_compatible(np, "snps,dwmac-3.40a")) {
+		plat->has_gmac = 1;
+		plat->enh_desc = 1;
+		plat->tx_coe = 1;
+		plat->bugged_jumbo = 1;
+		plat->pmt = 1;
+	}
+
+	if (of_device_is_compatible(np, "snps,dwmac-4.00") ||
+	    of_device_is_compatible(np, "snps,dwmac-4.10a") ||
+	    of_device_is_compatible(np, "snps,dwmac-4.20a")) {
+		plat->has_gmac4 = 1;
+		plat->has_gmac = 0;
+		plat->pmt = 1;
+		plat->tso_en = of_property_read_bool(np, "snps,tso");
+	}
+
+	if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
+		of_device_is_compatible(np, "snps,dwmac-3.710")) {
+		plat->enh_desc = 1;
+		plat->bugged_jumbo = 1;
+		plat->force_sf_dma_mode = 1;
+	}
+
+	if (of_device_is_compatible(np, "snps,dwxgmac")) {
+		plat->has_xgmac = 1;
+		plat->pmt = 1;
+		plat->tso_en = of_property_read_bool(np, "snps,tso");
+	}
+
+	dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
+			       GFP_KERNEL);
+	if (!dma_cfg) {
+		stmmac_remove_config_dt(pdev, plat);
+		return ERR_PTR(-ENOMEM);
+	}
+	plat->dma_cfg = dma_cfg;
+
+	of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
+	if (!dma_cfg->pbl)
+		dma_cfg->pbl = DEFAULT_DMA_PBL;
+	of_property_read_u32(np, "snps,txpbl", &dma_cfg->txpbl);
+	of_property_read_u32(np, "snps,rxpbl", &dma_cfg->rxpbl);
+	dma_cfg->pblx8 = !of_property_read_bool(np, "snps,no-pbl-x8");
+
+	dma_cfg->aal = of_property_read_bool(np, "snps,aal");
+	dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst");
+	dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst");
+
+	plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
+	if (plat->force_thresh_dma_mode) {
+		plat->force_sf_dma_mode = 0;
+		pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
+	}
+
+	of_property_read_u32(np, "snps,ps-speed", &plat->mac_port_sel_speed);
+
+	plat->axi = stmmac_axi_setup(pdev);
+
+	rc = stmmac_mtl_setup(pdev, plat);
+	if (rc) {
+		stmmac_remove_config_dt(pdev, plat);
+		return ERR_PTR(rc);
+	}
+
+	/* clock setup */
+	plat->stmmac_clk = devm_clk_get(&pdev->dev,
+					STMMAC_RESOURCE_NAME);
+	if (IS_ERR(plat->stmmac_clk)) {
+		dev_warn(&pdev->dev, "Cannot get CSR clock\n");
+		plat->stmmac_clk = NULL;
+	}
+	clk_prepare_enable(plat->stmmac_clk);
+
+	plat->pclk = devm_clk_get(&pdev->dev, "pclk");
+	if (IS_ERR(plat->pclk)) {
+		if (PTR_ERR(plat->pclk) == -EPROBE_DEFER)
+			goto error_pclk_get;
+
+		plat->pclk = NULL;
+	}
+	clk_prepare_enable(plat->pclk);
+
+	/* Fall-back to main clock in case of no PTP ref is passed */
+	plat->clk_ptp_ref = devm_clk_get(&pdev->dev, "ptp_ref");
+	if (IS_ERR(plat->clk_ptp_ref)) {
+		plat->clk_ptp_rate = clk_get_rate(plat->stmmac_clk);
+		plat->clk_ptp_ref = NULL;
+		dev_warn(&pdev->dev, "PTP uses main clock\n");
+	} else {
+		plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref);
+		dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate);
+	}
+
+	plat->stmmac_rst = devm_reset_control_get(&pdev->dev,
+						  STMMAC_RESOURCE_NAME);
+	if (IS_ERR(plat->stmmac_rst)) {
+		if (PTR_ERR(plat->stmmac_rst) == -EPROBE_DEFER)
+			goto error_hw_init;
+
+		dev_info(&pdev->dev, "no reset control found\n");
+		plat->stmmac_rst = NULL;
+	}
+
+	return plat;
+
+error_hw_init:
+	clk_disable_unprepare(plat->pclk);
+error_pclk_get:
+	clk_disable_unprepare(plat->stmmac_clk);
+
+	return ERR_PTR(-EPROBE_DEFER);
+}
+
+/**
+ * stmmac_remove_config_dt - undo the effects of stmmac_probe_config_dt()
+ * @pdev: platform_device structure
+ * @plat: driver data platform structure
+ *
+ * Release resources claimed by stmmac_probe_config_dt().
+ */
+void stmmac_remove_config_dt(struct platform_device *pdev,
+			     struct plat_stmmacenet_data *plat)
+{
+	struct device_node *np = pdev->dev.of_node;
+
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
+	of_node_put(plat->phy_node);
+	of_node_put(plat->mdio_node);
+}
+#else
+struct plat_stmmacenet_data *
+stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
+{
+	return ERR_PTR(-EINVAL);
+}
+
+void stmmac_remove_config_dt(struct platform_device *pdev,
+			     struct plat_stmmacenet_data *plat)
+{
+}
+#endif /* CONFIG_OF */
+EXPORT_SYMBOL_GPL(stmmac_probe_config_dt);
+EXPORT_SYMBOL_GPL(stmmac_remove_config_dt);
+
+int stmmac_get_platform_resources(struct platform_device *pdev,
+				  struct stmmac_resources *stmmac_res)
+{
+	struct resource *res;
+
+	memset(stmmac_res, 0, sizeof(*stmmac_res));
+
+	/* Get IRQ information early to have an ability to ask for deferred
+	 * probe if needed before we went too far with resource allocation.
+	 */
+	stmmac_res->irq = platform_get_irq_byname(pdev, "macirq");
+	if (stmmac_res->irq < 0) {
+		if (stmmac_res->irq != -EPROBE_DEFER) {
+			dev_err(&pdev->dev,
+				"MAC IRQ configuration information not found\n");
+		}
+		return stmmac_res->irq;
+	}
+
+	/* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
+	 * The external wake up irq can be passed through the platform code
+	 * named as "eth_wake_irq"
+	 *
+	 * In case the wake up interrupt is not passed from the platform
+	 * so the driver will continue to use the mac irq (ndev->irq)
+	 */
+	stmmac_res->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
+	if (stmmac_res->wol_irq < 0) {
+		if (stmmac_res->wol_irq == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		stmmac_res->wol_irq = stmmac_res->irq;
+	}
+
+	stmmac_res->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
+	if (stmmac_res->lpi_irq == -EPROBE_DEFER)
+		return -EPROBE_DEFER;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res);
+
+	return PTR_ERR_OR_ZERO(stmmac_res->addr);
+}
+EXPORT_SYMBOL_GPL(stmmac_get_platform_resources);
+
+/**
+ * stmmac_pltfr_remove
+ * @pdev: platform device pointer
+ * Description: this function calls the main to free the net resources
+ * and calls the platforms hook and release the resources (e.g. mem).
+ */
+int stmmac_pltfr_remove(struct platform_device *pdev)
+{
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct stmmac_priv *priv = netdev_priv(ndev);
+	struct plat_stmmacenet_data *plat = priv->plat;
+	int ret = stmmac_dvr_remove(&pdev->dev);
+
+	if (plat->exit)
+		plat->exit(pdev, plat->bsp_priv);
+
+	stmmac_remove_config_dt(pdev, plat);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);
+
+#ifdef CONFIG_PM_SLEEP
+/**
+ * stmmac_pltfr_suspend
+ * @dev: device pointer
+ * Description: this function is invoked when suspend the driver and it direcly
+ * call the main suspend function and then, if required, on some platform, it
+ * can call an exit helper.
+ */
+static int stmmac_pltfr_suspend(struct device *dev)
+{
+	int ret;
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct stmmac_priv *priv = netdev_priv(ndev);
+	struct platform_device *pdev = to_platform_device(dev);
+
+	ret = stmmac_suspend(dev);
+	if (priv->plat->exit)
+		priv->plat->exit(pdev, priv->plat->bsp_priv);
+
+	return ret;
+}
+
+/**
+ * stmmac_pltfr_resume
+ * @dev: device pointer
+ * Description: this function is invoked when resume the driver before calling
+ * the main resume function, on some platforms, it can call own init helper
+ * if required.
+ */
+static int stmmac_pltfr_resume(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct stmmac_priv *priv = netdev_priv(ndev);
+	struct platform_device *pdev = to_platform_device(dev);
+
+	if (priv->plat->init)
+		priv->plat->init(pdev, priv->plat->bsp_priv);
+
+	return stmmac_resume(dev);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend,
+				       stmmac_pltfr_resume);
+EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops);
+
+MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support");
+MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
+MODULE_LICENSE("GPL");