[PATCH v4 02/10] imx: power-domain: Descend into pgc subnode if present

[Marek Vasut]

In case the power domain node structure is gpc at 303a0000/pgc/power-domain at N,
do not bind power domain driver to the 'pgc' node, but rather descend into
it and only bind power domain drivers to power-domain at N subnodes. This way
we do not waste one useless driver instance associated with 'pgc' node.

Tested-By: Tim Harvey <tharvey at gateworks.com> #imx8mp-venice-defconfig
Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Peng Fan <peng.fan at nxp.com>
Cc: Stefano Babic <sbabic at denx.de>
---
V2: Add TB by Tim
V3: Skipped to align the Vx scheme
V4: Rebase on u-boot-imx/master
---
 drivers/power/domain/imx8m-power-domain.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/power/domain/imx8m-power-domain.c b/drivers/power/domain/imx8m-power-domain.c
index 6082ee6ff8c..ac7411f8327 100644
--- a/drivers/power/domain/imx8m-power-domain.c
+++ b/drivers/power/domain/imx8m-power-domain.c
@@ -73,6 +73,12 @@ static int imx8m_power_domain_bind(struct udevice *dev)
 		/* Bind the subnode to this driver */
 		name = fdt_get_name(gd->fdt_blob, offset, NULL);
 
+		/* Descend into 'pgc' subnode */
+		if (!strstr(name, "power-domain")) {
+			offset = fdt_first_subnode(gd->fdt_blob, offset);
+			name = fdt_get_name(gd->fdt_blob, offset, NULL);
+		}
+
 		ret = device_bind_with_driver_data(dev, dev->driver, name,
 						   dev->driver_data,
 						   offset_to_ofnode(offset),
-- 
2.35.1