linux-kernel - [PATCH v16 06/14] remoteproc: mediatek: Revise SCP rproc initialization flow for multi-core SCP

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Message-ID: <20230728023959.12293-7-tinghan.shen@mediatek.com>
Date:   Fri, 28 Jul 2023 10:39:51 +0800
From:   Tinghan Shen <tinghan.shen@...iatek.com>
To:     Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Tinghan Shen <tinghan.shen@...iatek.com>
CC:     <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>
Subject: [PATCH v16 06/14] remoteproc: mediatek: Revise SCP rproc initialization flow for multi-core SCP

This is the 2nd preliminary step for probing multi-core SCP.
Initialization of configuration and L1TCM registers is extracted
to only performed once on multi-core SCP. The rest of remoteproc
initialization procedure is similar for both single and multi-core
SCP and is applied to each core.

Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
---
 drivers/remoteproc/mtk_scp.c | 63 ++++++++++++++++++++++--------------
 1 file changed, 39 insertions(+), 24 deletions(-)

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index f88e60e4bc21..7a2ba1e1e95a 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -854,21 +854,17 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp)
 	}
 }
 
-static int scp_probe(struct platform_device *pdev)
+static int scp_rproc_init(struct platform_device *pdev,
+			  struct mtk_scp_of_cluster *scp_cluster)
 {
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
 	struct mtk_scp *scp;
-	struct mtk_scp_of_cluster *scp_cluster;
 	struct rproc *rproc;
 	struct resource *res;
 	const char *fw_name = "scp.img";
 	int ret, i;
 
-	scp_cluster = devm_kzalloc(dev, sizeof(*scp_cluster), GFP_KERNEL);
-	if (!scp_cluster)
-		return -ENOMEM;
-
 	ret = rproc_of_parse_firmware(dev, 0, &fw_name);
 	if (ret < 0 && ret != -EINVAL)
 		return ret;
@@ -893,24 +889,6 @@ static int scp_probe(struct platform_device *pdev)
 	scp->sram_size = resource_size(res);
 	scp->sram_phys = res->start;
 
-	/* l1tcm is an optional memory region */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
-	scp->cluster->l1tcm_base = devm_ioremap_resource(dev, res);
-	if (IS_ERR(scp->cluster->l1tcm_base)) {
-		ret = PTR_ERR(scp->cluster->l1tcm_base);
-		if (ret != -EINVAL) {
-			return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
-		}
-	} else {
-		scp->cluster->l1tcm_size = resource_size(res);
-		scp->cluster->l1tcm_phys = res->start;
-	}
-
-	scp->cluster->reg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
-	if (IS_ERR(scp->cluster->reg_base))
-		return dev_err_probe(dev, PTR_ERR(scp->cluster->reg_base),
-				     "Failed to parse and map cfg memory\n");
-
 	ret = scp->data->scp_clk_get(scp);
 	if (ret)
 		return ret;
@@ -962,6 +940,43 @@ static int scp_probe(struct platform_device *pdev)
 	return ret;
 }
 
+static int scp_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mtk_scp_of_cluster *scp_cluster;
+	struct resource *res;
+	int ret;
+
+	scp_cluster = devm_kzalloc(dev, sizeof(*scp_cluster), GFP_KERNEL);
+	if (!scp_cluster)
+		return -ENOMEM;
+
+	scp_cluster->reg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
+	if (IS_ERR(scp_cluster->reg_base))
+		return dev_err_probe(dev, PTR_ERR(scp_cluster->reg_base),
+				     "Failed to parse and map cfg memory\n");
+
+	/* l1tcm is an optional memory region */
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
+	scp_cluster->l1tcm_base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(scp_cluster->l1tcm_base)) {
+		ret = PTR_ERR(scp_cluster->l1tcm_base);
+		if (ret != -EINVAL)
+			return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
+
+		scp_cluster->l1tcm_base = NULL;
+	} else {
+		scp_cluster->l1tcm_size = resource_size(res);
+		scp_cluster->l1tcm_phys = res->start;
+	}
+
+	ret = scp_rproc_init(pdev, scp_cluster);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
 static void scp_remove(struct platform_device *pdev)
 {
 	struct mtk_scp *scp = platform_get_drvdata(pdev);
-- 
2.18.0