linux-kernel - [PATCH v3 07/11] remoteproc: mediatek: Probe MT8195 SCP core 1

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Message-ID: <20220927025606.26673-8-tinghan.shen@mediatek.com>
Date:   Tue, 27 Sep 2022 10:56:02 +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>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tiffany Lin <tiffany.lin@...iatek.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Yunfei Dong <yunfei.dong@...iatek.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Tinghan Shen <tinghan.shen@...iatek.com>
CC:     <linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>
Subject: [PATCH v3 07/11] remoteproc: mediatek: Probe MT8195 SCP core 1

The MT8195 SCP configuration registers for core 0 and core 1 is the same.
Let SCP core 1 to reuse the mapped address requested by SCP core 0.

Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
---
 drivers/remoteproc/mtk_common.h |  2 ++
 drivers/remoteproc/mtk_scp.c    | 27 +++++++++++++++++++++++----
 2 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index 3778894c96f3..54265c515315 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h
@@ -140,6 +140,8 @@ struct mtk_scp {
 	size_t dram_size;
 
 	struct rproc_subdev *rpmsg_subdev;
+
+	struct mtk_scp *main_scp;
 };
 
 /**
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 1d17d77b8a14..f7b738743ba9 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -917,10 +917,29 @@ static int scp_probe(struct platform_device *pdev)
 		scp->l1tcm_phys = res->start;
 	}
 
-	scp->reg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
-	if (IS_ERR(scp->reg_base))
-		return dev_err_probe(dev, PTR_ERR(scp->reg_base),
-				     "Failed to parse and map cfg memory\n");
+	if (of_device_is_compatible(np, "mediatek,mt8195-scp-core")) {
+		struct device_node *pnp;
+		struct platform_device *scp_pdev;
+
+		pnp = of_get_parent(np);
+		if (!pnp)
+			return dev_err_probe(dev, -ENODEV, "Failed to get parent core 0\n");
+
+		scp_pdev = of_find_device_by_node(pnp);
+		of_node_put(pnp);
+		if (!scp_pdev)
+			return dev_err_probe(dev, -ENODEV, "Failed to get scp core 0 pdev\n");
+
+		scp->main_scp = platform_get_drvdata(scp_pdev);
+		scp->reg_base = scp->main_scp->reg_base;
+	} else {
+		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
+		scp->reg_base = devm_ioremap_resource(dev, res);
+
+		if (IS_ERR(scp->reg_base))
+			return dev_err_probe(dev, PTR_ERR(scp->reg_base),
+					     "Failed to parse and map cfg memory\n");
+	}
 
 	ret = scp->data->scp_clk_get(scp);
 	if (ret)
-- 
2.18.0