linux-kernel - [PATCH v4 3/3] nvmem: mtk-efuse: Register MediaTek socinfo driver from efuse

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Date: Fri, 22 Dec 2023 16:07:39 +0800
From: William-tw Lin <william-tw.lin@...iatek.com>
To: 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>, Srinivas Kandagatla
	<srinivas.kandagatla@...aro.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	William-tw Lin <william-tw.lin@...iatek.com>
Subject: [PATCH v4 3/3] nvmem: mtk-efuse: Register MediaTek socinfo driver from efuse

The socinfo driver reads chip information from eFuses and does not need
any devicetree node. Register it from mtk-efuse.

While at it, also add the name for this driver's nvmem_config.

Signed-off-by: William-tw Lin <william-tw.lin@...iatek.com>
---
 drivers/nvmem/mtk-efuse.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c
index 84f05b40a411..f5bebcecf9bd 100644
--- a/drivers/nvmem/mtk-efuse.c
+++ b/drivers/nvmem/mtk-efuse.c
@@ -68,6 +68,7 @@ static int mtk_efuse_probe(struct platform_device *pdev)
 	struct nvmem_config econfig = {};
 	struct mtk_efuse_priv *priv;
 	const struct mtk_efuse_pdata *pdata;
+	struct platform_device *socinfo;
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -85,11 +86,20 @@ static int mtk_efuse_probe(struct platform_device *pdev)
 	econfig.size = resource_size(res);
 	econfig.priv = priv;
 	econfig.dev = dev;
+	econfig.name = "mtk-efuse";
 	if (pdata->uses_post_processing)
 		econfig.fixup_dt_cell_info = &mtk_efuse_fixup_dt_cell_info;
 	nvmem = devm_nvmem_register(dev, &econfig);
+	if (IS_ERR(nvmem))
+		return PTR_ERR(nvmem);
 
-	return PTR_ERR_OR_ZERO(nvmem);
+	socinfo = platform_device_register_data(&pdev->dev, "mtk-socinfo",
+						PLATFORM_DEVID_AUTO, NULL, 0);
+	if (IS_ERR(socinfo))
+		dev_info(dev, "MediaTek SoC Information will be unavailable\n");
+
+	platform_set_drvdata(pdev, socinfo);
+	return 0;
 }
 
 static const struct mtk_efuse_pdata mtk_mt8186_efuse_pdata = {
@@ -108,8 +118,17 @@ static const struct of_device_id mtk_efuse_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, mtk_efuse_of_match);
 
+static void mtk_efuse_remove(struct platform_device *pdev)
+{
+	struct platform_device *socinfo = platform_get_drvdata(pdev);
+
+	if (!IS_ERR_OR_NULL(socinfo))
+		platform_device_unregister(socinfo);
+}
+
 static struct platform_driver mtk_efuse_driver = {
 	.probe = mtk_efuse_probe,
+	.remove_new = mtk_efuse_remove,
 	.driver = {
 		.name = "mediatek,efuse",
 		.of_match_table = mtk_efuse_of_match,
-- 
2.18.0