linux-kernel - [PATCH 2/2] remoteproc: mediatek: Don't parse extraneous subnodes for multi-core

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Message-ID: <20240321084614.45253-3-angelogioacchino.delregno@collabora.com>
Date: Thu, 21 Mar 2024 09:46:14 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: mathieu.poirier@...aro.org
Cc: andersson@...nel.org,
	matthias.bgg@...il.com,
	angelogioacchino.delregno@...labora.com,
	tzungbi@...nel.org,
	tinghan.shen@...iatek.com,
	linux-remoteproc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	wenst@...omium.org,
	kernel@...labora.com
Subject: [PATCH 2/2] remoteproc: mediatek: Don't parse extraneous subnodes for multi-core

When probing multi-core SCP, this driver is parsing all sub-nodes of
the scp-cluster node, but one of those could be not an actual SCP core
and that would make the entire SCP cluster to fail probing for no good
reason.

To fix that, in scp_add_multi_core() treat a subnode as a SCP Core by
parsing only available subnodes having compatible "mediatek,scp-core".

Fixes: 1fdbf0cdde98 ("remoteproc: mediatek: Probe SCP cluster on multi-core SCP")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/remoteproc/mtk_scp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 67518291a8ad..fbe1c232dae7 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -1096,6 +1096,9 @@ static int scp_add_multi_core(struct platform_device *pdev,
 	cluster_of_data = (const struct mtk_scp_of_data **)of_device_get_match_data(dev);
 
 	for_each_available_child_of_node(np, child) {
+		if (!of_device_is_compatible(child, "mediatek,scp-core"))
+			continue;
+
 		if (!cluster_of_data[core_id]) {
 			ret = -EINVAL;
 			dev_err(dev, "Not support core %d\n", core_id);
-- 
2.44.0