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Subject[patch v2 net-next 13/13] net: hns: net: hns: enet adds support of acpi
Date
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>
---
change log:
v2:
1. use acpi_dev_found() instead of acpi_match_device_ids()
2. use is_acpi_node() to check if it works by ACPI case
3. use dev_of_node() to check if it works by DT case

v1: first submit
link: https://lkml.org/lkml/2016/5/13/99
---
drivers/net/ethernet/hisilicon/hns/hns_enet.c | 56 +++++++++++++++++++++------
1 file changed, 44 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
index 3ec3c27..ad742a6 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)
@@ -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,
--
1.9.1
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