linux-kernel - [PATCH v2 18/23] clk: mediatek: clk-mtk: Register MFG notifier in mtk_clk_simple

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Date:   Fri, 23 Dec 2022 10:42:54 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     mturquette@...libre.com
Cc:     sboyd@...nel.org, matthias.bgg@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org,
        angelogioacchino.delregno@...labora.com, wenst@...omium.org,
        johnson.wang@...iatek.com, miles.chen@...iatek.com,
        fparent@...libre.com, chun-jie.chen@...iatek.com,
        sam.shih@...iatek.com, y.oudjana@...tonmail.com,
        nfraprado@...labora.com, rex-bc.chen@...iatek.com,
        ryder.lee@...nel.org, daniel@...rotopia.org,
        jose.exposito89@...il.com, yangyingliang@...wei.com,
        pablo.sun@...iatek.com, msp@...libre.com, weiyi.lu@...iatek.com,
        ikjn@...omium.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        kernel@...labora.com
Subject: [PATCH v2 18/23] clk: mediatek: clk-mtk: Register MFG notifier in mtk_clk_simple_probe()

In preparation for commonizing topckgen probe on various MediaTek SoCs
clock drivers, add the ability to register the MFG MUX notifier in
mtk_clk_simple_probe() by passing a custom notifier register function
pointer, as this function will be slightly different across different
SoCs.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/clk/mediatek/clk-mtk.c | 8 ++++++++
 drivers/clk/mediatek/clk-mtk.h | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index b0a6225cd7b2..df6281492fb6 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -533,6 +533,14 @@ int mtk_clk_simple_probe(struct platform_device *pdev)
 			goto unregister_composites;
 	}
 
+	if (mcd->clk_notifier_func) {
+		struct clk *mfg_mux = clk_data->hws[mcd->mfg_clk_idx]->clk;
+
+		r = mcd->clk_notifier_func(&pdev->dev, mfg_mux);
+		if (r)
+			goto unregister_clks;
+	}
+
 	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 	if (r)
 		goto unregister_clks;
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index 1d036ba6ca07..bdbd36e3d794 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -231,6 +231,9 @@ struct mtk_clk_desc {
 	const struct mtk_clk_rst_desc *rst_desc;
 	spinlock_t *clk_lock;
 	bool shared_io;
+
+	int (*clk_notifier_func)(struct device *dev, struct clk *clk);
+	unsigned int mfg_clk_idx;
 };
 
 int mtk_clk_simple_probe(struct platform_device *pdev);
-- 
2.39.0