[PATCH net] net: hns: Add ACPI support to check SFP present

[Salil Mehta]

From: Daode Huang <huangda...@hisilicon.com>

The current code only supports DT to check SFP present.
This patch adds ACPI support as well.

Signed-off-by: Daode Huang <huangda...@hisilicon.com>
Reviewed-by: Yisen Zhuang <yisen.zhu...@huawei.com>
Signed-off-by: Salil Mehta <salil.me...@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c  | 11 +++++----
 drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c | 28 +++++++++++++++++++++-
 2 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c 
b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
index 696f2ae..0c1f56e 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
@@ -82,9 +82,12 @@ void hns_mac_get_link_status(struct hns_mac_cb *mac_cb, u32 
*link_status)
        else
                *link_status = 0;
 
-       ret = mac_cb->dsaf_dev->misc_op->get_sfp_prsnt(mac_cb, &sfp_prsnt);
-       if (!ret)
-               *link_status = *link_status && sfp_prsnt;
+       if (mac_cb->media_type == HNAE_MEDIA_TYPE_FIBER) {
+               ret = mac_cb->dsaf_dev->misc_op->get_sfp_prsnt(mac_cb,
+                                                              &sfp_prsnt);
+               if (!ret)
+                       *link_status = *link_status && sfp_prsnt;
+       }
 
        mac_cb->link = *link_status;
 }
@@ -816,7 +819,7 @@ static int  hns_mac_get_info(struct hns_mac_cb *mac_cb)
                of_node_put(np);
 
                np = of_parse_phandle(to_of_node(mac_cb->fw_port),
-                                       "serdes-syscon", 0);
+                                     "serdes-syscon", 0);
                syscon = syscon_node_to_regmap(np);
                of_node_put(np);
                if (IS_ERR_OR_NULL(syscon)) {
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c 
b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
index a2c22d0..e13aa06 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
@@ -461,6 +461,32 @@ int hns_mac_get_sfp_prsnt(struct hns_mac_cb *mac_cb, int 
*sfp_prsnt)
        return 0;
 }
 
+int hns_mac_get_sfp_prsnt_acpi(struct hns_mac_cb *mac_cb, int *sfp_prsnt)
+{
+       union acpi_object *obj;
+       union acpi_object obj_args, argv4;
+
+       obj_args.integer.type = ACPI_TYPE_INTEGER;
+       obj_args.integer.value = mac_cb->mac_id;
+
+       argv4.type = ACPI_TYPE_PACKAGE,
+       argv4.package.count = 1,
+       argv4.package.elements = &obj_args,
+
+       obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dev),
+                               hns_dsaf_acpi_dsm_uuid, 0,
+                               HNS_OP_GET_SFP_STAT_FUNC, &argv4);
+
+       if (!obj || obj->type != ACPI_TYPE_INTEGER)
+               return -ENODEV;
+
+       *sfp_prsnt = obj->integer.value;
+
+       ACPI_FREE(obj);
+
+       return 0;
+}
+
 /**
  * hns_mac_config_sds_loopback - set loop back for serdes
  * @mac_cb: mac control block
@@ -592,7 +618,7 @@ struct dsaf_misc_op *hns_misc_op_get(struct dsaf_device 
*dsaf_dev)
                misc_op->hns_dsaf_roce_srst = hns_dsaf_roce_srst_acpi;
 
                misc_op->get_phy_if = hns_mac_get_phy_if_acpi;
-               misc_op->get_sfp_prsnt = hns_mac_get_sfp_prsnt;
+               misc_op->get_sfp_prsnt = hns_mac_get_sfp_prsnt_acpi;
 
                misc_op->cfg_serdes_loopback = hns_mac_config_sds_loopback_acpi;
        } else {
-- 
2.7.4