net: hns: net: hns: enet adds support of acpi

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@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
index 3ec3c27983798cf0d222f7d4468def4ebfde0221..ad742a6f587952f0d44826070561ed9d83c39832 100644 (file)
--- 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)
@@ -1870,7 +1877,6 @@ 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;
 
@@ -1884,20 +1890,45 @@ 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 (dev_of_node(dev)) {
+               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;
+               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 (is_acpi_node(dev->fwnode)) {
+               struct acpi_reference_args args;
+
+               if (acpi_dev_found(hns_enet_acpi_match[0].id))
+                       priv->enet_ver = AE_VERSION_1;
+               else if (acpi_dev_found(hns_enet_acpi_match[1].id))
+                       priv->enet_ver = AE_VERSION_2;
+               else
+                       return -ENXIO;
+
+               /* try to find port-idx-in-ae first */
+               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;
        }
-       priv->fwnode = &ae_node->fwnode;
 
-       /* try to find port-idx-in-ae first */
        ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
        if (ret) {
                /* only for old code compatible */
@@ -2014,6 +2045,7 @@ 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,