net: hns: add attribute reset-field-offset for dsaf node

Add the subctrl reset offset for dsaf, this property is used to reset
xge/ge ports for different dsaf. If this attribute is not present,
default value 0 will be used.

Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Signed-off-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
index 769285375341..b418d4201290 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
@@ -36,6 +36,7 @@ int hns_dsaf_get_cfg(struct dsaf_device *dsaf_dev)
         int ret, i;
         u32 desc_num;
         u32 buf_size;
+        u32 reset_offset = 0;
         const char *mode_str;
         struct device_node *np = dsaf_dev->dev->of_node;
 
@@ -119,6 +120,13 @@ int hns_dsaf_get_cfg(struct dsaf_device *dsaf_dev)
         }
         dsaf_dev->desc_num = desc_num;
 
+        ret = of_property_read_u32(np, "reset-field-offset", &reset_offset);
+        if (ret < 0) {
+                dev_dbg(dsaf_dev->dev,
+                        "get reset-field-offset fail, ret=%d!\r\n", ret);
+        }
+        dsaf_dev->reset_offset = reset_offset;
+
         ret = of_property_read_u32(np, "buf-size", &buf_size);
         if (ret < 0) {
                 dev_err(dsaf_dev->dev,