[patch net-next 11/11] net: hns: enet adds support of acpi

[Yisen Zhuang]

From: Kejian Yan <yankejian@xxxxxxxxxx>

Enet needs to get configration parameter by acpi. This patch
adds support of ACPI for enet. The configuration parameter will
be configed in BIOS.

Signed-off-by: Kejian Yan <yankejian@xxxxxxxxxx>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@xxxxxxxxxx>
---
 drivers/net/ethernet/hisilicon/hns/hns_enet.c | 54 +++++++++++++++++++++------
 1 file changed, 42 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
index 34ebe7d..ade14d9 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
@@ -132,6 +132,13 @@ static void fill_v2_desc(struct hnae_ring *ring, void *priv,
 	ring_ptr_move_fw(ring, next_to_use);
 }
 
+static const struct acpi_device_id hns_enet_acpi_match[] = {
+	{ "HISI00C1", 0 },
+	{ "HISI00C2", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
+
 static void fill_desc(struct hnae_ring *ring, void *priv,
 		      int size, dma_addr_t dma, int frag_end,
 		      int buf_num, enum hns_desc_type type, int mtu)
@@ -1903,7 +1910,6 @@ static int hns_nic_dev_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct net_device *ndev;
 	struct hns_nic_priv *priv;
-	struct device_node *ae_node;
 	u32 port_id;
 	int ret;
 
@@ -1917,19 +1923,42 @@ static int hns_nic_dev_probe(struct platform_device *pdev)
 	priv->dev = dev;
 	priv->netdev = ndev;
 
-	if (of_device_is_compatible(dev->of_node, "hisilicon,hns-nic-v1"))
-		priv->enet_ver = AE_VERSION_1;
-	else
-		priv->enet_ver = AE_VERSION_2;
+	if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
+		struct device_node *ae_node;
 
-	ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
-	if (IS_ERR_OR_NULL(ae_node)) {
-		ret = PTR_ERR(ae_node);
-		dev_err(dev, "not find ae-handle\n");
-		goto out_read_prop_fail;
-	}
-	priv->fwnode = &ae_node->fwnode;
+		if (of_device_is_compatible(dev->of_node,
+					    "hisilicon,hns-nic-v1"))
+			priv->enet_ver = AE_VERSION_1;
+		else
+			priv->enet_ver = AE_VERSION_2;
+
+		ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
+		if (IS_ERR_OR_NULL(ae_node)) {
+			ret = PTR_ERR(ae_node);
+			dev_err(dev, "not find ae-handle\n");
+			goto out_read_prop_fail;
+		}
+			priv->fwnode = &ae_node->fwnode;
+	} else if (ACPI_COMPANION(&pdev->dev)) {
+		struct acpi_device *adev = to_acpi_device_node(dev->fwnode);
+		struct acpi_reference_args args;
 
+		if (!acpi_match_device_ids(adev, &hns_enet_acpi_match[1]))
+			priv->enet_ver = AE_VERSION_2;
+		else
+			priv->enet_ver = AE_VERSION_1;
+
+		ret = acpi_node_get_property_reference(dev->fwnode,
+						       "ae-handle", 0, &args);
+		if (ret) {
+			dev_err(dev, "not find ae-handle\n");
+			goto out_read_prop_fail;
+		}
+		priv->fwnode = acpi_fwnode_handle(args.adev);
+	} else {
+		dev_err(dev, "cannot read cfg data from OF or acpi\n");
+		return -ENXIO;
+	}
 	ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
 	if (ret) {
 		/* only for old code compatible */
@@ -2046,6 +2075,7 @@ static struct platform_driver hns_nic_dev_driver = {
 	.driver = {
 		.name = "hns-nic",
 		.of_match_table = hns_enet_of_match,
+		.acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
 	},
 	.probe = hns_nic_dev_probe,
 	.remove = hns_nic_dev_remove,
-- 
1.9.1