linux-kernel - [PATCH] soc: mediatek: socinfo: Advertise about unknown MediaTek SoC

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Date: Thu, 14 Mar 2024 12:30:15 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: matthias.bgg@...il.com
Cc: angelogioacchino.delregno@...labora.com,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	wenst@...omium.org,
	kernel@...labora.com
Subject: [PATCH] soc: mediatek: socinfo: Advertise about unknown MediaTek SoC

In case we're running on a MediaTek SoC that is not declared in the
socinfo_data_table, print a message stating that and, with it, also
print out the read eFuse data: this allows to easily add a new SoC
in the table, granted that its actual soc/segment/marketing names
are already previously known.

This is especially useful when booting an already known SoC that
already has socinfo support, but has a different silicon version
and/or revision, hence different model information in the eFuses.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/soc/mediatek/mtk-socinfo.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/mediatek/mtk-socinfo.c b/drivers/soc/mediatek/mtk-socinfo.c
index 42572e8c1520..4494cca1d075 100644
--- a/drivers/soc/mediatek/mtk-socinfo.c
+++ b/drivers/soc/mediatek/mtk-socinfo.c
@@ -144,7 +144,14 @@ static int mtk_socinfo_get_socinfo_data(struct mtk_socinfo *mtk_socinfop)
 		}
 	}
 
-	return match_socinfo_index >= 0 ? match_socinfo_index : -ENOENT;
+	if (match_socinfo_index < 0) {
+		dev_warn(mtk_socinfop->dev,
+			 "Unknown MediaTek SoC with ID 0x%08x 0x%08x\n",
+			  cell_data[0], cell_data[1]);
+		return -ENOENT;
+	}
+
+	return match_socinfo_index;
 }
 
 static int mtk_socinfo_probe(struct platform_device *pdev)
-- 
2.44.0