linux-kernel - [PATCH v2 2/2] remoteproc: mediatek: allow reading firmware-name from DT

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Date:   Thu, 14 Apr 2022 20:21:40 +0800
From:   Allen-KH Cheng <allen-kh.cheng@...iatek.com>
To:     Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     Hsin-Yi Wang <hsinyi@...omium.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-remoteproc@...r.kernel.org>,
        Allen-KH Cheng <allen-kh.cheng@...iatek.com>
Subject: [PATCH v2 2/2] remoteproc: mediatek: allow reading firmware-name from DT

The SCP firmware blob differs between platforms and SoCs. We add
support in the SCP driver for reading the path of firmware file from
DT in order to allow these files to live in a generic file system
(or linux-firmware).

The firmware-name property is optional and the code falls back to the
old filename if the property isn't present.

Signed-off-by: Allen-KH Cheng <allen-kh.cheng@...iatek.com>
---
 drivers/remoteproc/mtk_scp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index ee6c4009586e..82813d74e829 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -809,9 +809,14 @@ static int scp_probe(struct platform_device *pdev)
 	struct mtk_scp *scp;
 	struct rproc *rproc;
 	struct resource *res;
-	char *fw_name = "scp.img";
+	const char *fw_name = "scp.img";
 	int ret, i;
 
+	ret = of_property_read_string(pdev->dev.of_node, "firmware-name",
+				      &fw_name);
+	if (ret < 0 && ret != -EINVAL)
+		return ret;
+
 	rproc = devm_rproc_alloc(dev, np->name, &scp_ops, fw_name, sizeof(*scp));
 	if (!rproc)
 		return dev_err_probe(dev, -ENOMEM, "unable to allocate remoteproc\n");
-- 
2.18.0