[PATCH v3 1/2] ARM: i.MX8MP: skov: add fallback for unsupported HW

[Oleksij Rempel <o.rempel@pengutronix.de>]

Add fallback support for currently not supported HW. Instead of
completely fail, it is better to use some kind of basic devicetree with
reduced functionality.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 arch/arm/boards/skov-imx8mp/board.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/arch/arm/boards/skov-imx8mp/board.c b/arch/arm/boards/skov-imx8mp/board.c
index 3b6eb7b080..d4cb9c8279 100644
--- a/arch/arm/boards/skov-imx8mp/board.c
+++ b/arch/arm/boards/skov-imx8mp/board.c
@@ -85,6 +85,10 @@ static const struct board_description imx8mp_variants[] = {
 	},
 };
 
+static const struct board_description imx8mp_basic_variant = {
+	.dts_compatible = "skov,imx8mp-skov-basic",
+};
+
 static int skov_imx8mp_fixup(struct device_node *root, void *data)
 {
 	struct device_node *chosen = of_create_node(root, "/chosen");
@@ -171,12 +175,12 @@ static int skov_imx8mp_init_variant(struct skov_imx8mp_priv *priv)
 	priv->variant_id = v;
 
 	if (v >= ARRAY_SIZE(imx8mp_variants)) {
-		dev_err(dev, "Invalid variant %u\n", v);
-		return -EINVAL;
+		dev_warn(dev, "Unsupported variant %u. Fall back to basic variant\n", v);
+		variant = &imx8mp_basic_variant;
+	} else {
+		variant = &imx8mp_variants[v];
 	}
 
-	variant = &imx8mp_variants[v];
-
 	if (variant->flags & SKOV_IMX8MP_HAS_HDMI) {
 		ret = skov_imx8mp_get_hdmi(dev);
 		if (ret < 0)
-- 
2.39.2