[PATCH v2 16/21] net: tsec: Support <reg> property from the subnode "queue-group"

[Bin Meng]

At present the tsec driver uses a non-standard DT bindings to get
its <reg> base / size. The upstream Linux kernel seems to require
the <reg> base / size to be put under a subnode of the eTSEC node
with a name prefix "queue-group". This is not documented in the
kernel DT bindings, but it looks every dtsi file that contains the
eTSEC node was written like this.

This commit updates the tsec driver to handle this case.

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
Reviewed-by: Ramon Fried <rfried.dev at gmail.com>
---

(no changes since v1)

 drivers/net/tsec.c | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c
index f801d020fb..49bed0c1dd 100644
--- a/drivers/net/tsec.c
+++ b/drivers/net/tsec.c
@@ -827,13 +827,35 @@ int tsec_probe(struct udevice *dev)
 	struct tsec_data *data;
 	const char *phy_mode;
 	fdt_addr_t reg;
-	ofnode parent;
+	ofnode parent, child;
 	int ret;
 
 	data = (struct tsec_data *)dev_get_driver_data(dev);
 
 	pdata->iobase = (phys_addr_t)dev_read_addr(dev);
-	priv->regs = dev_remap_addr(dev);
+	if (pdata->iobase != FDT_ADDR_T_NONE) {
+		priv->regs = dev_remap_addr(dev);
+	} else {
+		ofnode_for_each_subnode(child, dev_ofnode(dev)) {
+			if (!strncmp(ofnode_get_name(child), "queue-group",
+				     strlen("queue-group"))) {
+				reg = ofnode_get_addr(child);
+				if (reg == FDT_ADDR_T_NONE) {
+					printf("No 'reg' property of <queue-group>\n");
+					return -ENOENT;
+				}
+				pdata->iobase = reg;
+				priv->regs = map_physmem(pdata->iobase, 0,
+							 MAP_NOCACHE);
+				break;
+			}
+		}
+
+		if (!ofnode_valid(child)) {
+			printf("No child node for <queue-group>?\n");
+			return -ENOENT;
+		}
+	}
 
 	ret = dev_read_phandle_with_args(dev, "tbi-handle", NULL, 0, 0,
 					 &phandle_args);
-- 
2.25.1