[PATCH v1 1/2] ARM: i.MX8MP: skov: add fallback for unsupported HW

[Oleksij Rempel]

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.rem...@pengutronix.de>
---
 arch/arm/boards/skov-imx8mp/board.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/arch/arm/boards/skov-imx8mp/board.c 
b/arch/arm/boards/skov-imx8mp/board.c
index 5424c3b9ab..a45fe8517f 100644
--- a/arch/arm/boards/skov-imx8mp/board.c
+++ b/arch/arm/boards/skov-imx8mp/board.c
@@ -83,6 +83,12 @@ static const struct board_description imx8mp_variants[] = {
                .dts_compatible_hdmi = "skov,imx8mp-skov-revb-hdmi",
                .flags = SKOV_IMX8MP_HAS_HDMI,
        },
+       /* Keep this entry always on the last place. It will be used
+        * as fallback variant if not supported variant is detected.
+        */
+       {
+               .dts_compatible = "skov,imx8mp-skov-basic",
+       },
 };
 
 static int skov_imx8mp_fixup(struct device_node *root, void *data)
@@ -168,13 +174,14 @@ static int skov_imx8mp_init_variant(struct 
skov_imx8mp_priv *priv)
        if (ret)
                return ret;
 
-       priv->variant_id = v;
 
        if (v >= ARRAY_SIZE(imx8mp_variants)) {
-               dev_err(dev, "Invalid variant %u\n", v);
-               return -EINVAL;
+               dev_warn(dev, "Unsuported variant %u. Fall back to basic 
variant\n", v);
+               v = ARRAY_SIZE(imx8mp_variants) - 1;
        }
 
+       priv->variant_id = v;
+
        variant = &imx8mp_variants[v];
 
        if (variant->flags & SKOV_IMX8MP_HAS_HDMI) {
-- 
2.39.2