linux-kernel - [PATCH v2 2/2] remoteproc: mediatek: Support multiple reserved memory regions

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Message-ID: <20240731121730.1196-3-shun-yi.wang@mediatek.com>
Date: Wed, 31 Jul 2024 20:17:30 +0800
From: Shun-yi Wang <shun-yi.wang@...iatek.com>
To: Bjorn Andersson <andersson@...nel.org>, Mathieu Poirier
	<mathieu.poirier@...aro.org>, Rob Herring <robh@...nel.org>
CC: Krzysztof Kozlowski <krzk+dt@...nel.org>, Matthias Brugger
	<matthias.bgg@...il.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Conor Dooley
	<conor+dt@...nel.org>, Tinghan Shen <tinghan.shen@...iatek.com>,
	<linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-mediatek@...ts.infradead.org>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>,
	<jason-ch.chen@...iatek.com>, <yaya.chang@...iatek.com>,
	<teddy.chen@...iatek.com>, shun-yi.wang <shun-yi.wang@...iatek.com>
Subject: [PATCH v2 2/2] remoteproc: mediatek: Support multiple reserved memory regions

From: "shun-yi.wang" <shun-yi.wang@...iatek.com>

SCP supports multiple reserved memory regions, intended for
specific hardwards.

Signed-off-by: shun-yi.wang <shun-yi.wang@...iatek.com>
---
 drivers/remoteproc/mtk_scp.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 857a61760b27..0e799d0bf73d 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -1006,20 +1006,29 @@ EXPORT_SYMBOL_GPL(scp_mapping_dm_addr);
 
 static int scp_map_memory_region(struct mtk_scp *scp)
 {
-	int ret;
 	const struct mtk_scp_sizes_data *scp_sizes;
+	struct device_node *node = scp->dev->of_node;
+	struct of_phandle_iterator it;
+	int ret, err;
+	int i = 0;
 
-	ret = of_reserved_mem_device_init(scp->dev);
+	of_for_each_phandle(&it, err, node, "memory-region", NULL, 0) {
+		ret = of_reserved_mem_device_init_by_idx(scp->dev, node, i);
 
-	/* reserved memory is optional. */
-	if (ret == -ENODEV) {
-		dev_info(scp->dev, "skipping reserved memory initialization.");
-		return 0;
+		if (ret) {
+			dev_err(scp->dev, "failed to assign memory-region: %s\n",
+				it.node->name);
+			of_node_put(it.node);
+			return -ENOMEM;
+		}
+
+		i++;
 	}
 
-	if (ret) {
-		dev_err(scp->dev, "failed to assign memory-region: %d\n", ret);
-		return -ENOMEM;
+	/* reserved memory is optional. */
+	if (i == 0) {
+		dev_dbg(scp->dev, "skipping reserved memory initialization.");
+		return 0;
 	}
 
 	/* Reserved SCP code size */
-- 
2.18.0