linux-kernel - [PATCH 09/13] soc: mediatek: mtk-dvfsrc: Get and Enable DVFSRC clock

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Message-Id: <20251114-mt8196-dvfsrc-v1-9-b956d4631468@collabora.com>
Date: Fri, 14 Nov 2025 17:54:03 +0100
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Henry Chen <henryc.chen@...iatek.com>, Georgi Djakov <djakov@...nel.org>
Cc: kernel@...labora.com, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, linux-pm@...r.kernel.org, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH 09/13] soc: mediatek: mtk-dvfsrc: Get and Enable DVFSRC
 clock

The DVFSRC has a clock on all platforms.

Get and enable it in the probe function, so that Linux's common clock
framework knows we're a user of it.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
 drivers/soc/mediatek/mtk-dvfsrc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-dvfsrc.c b/drivers/soc/mediatek/mtk-dvfsrc.c
index 3a83fd4baf54..a43d6f913914 100644
--- a/drivers/soc/mediatek/mtk-dvfsrc.c
+++ b/drivers/soc/mediatek/mtk-dvfsrc.c
@@ -7,6 +7,7 @@
 
 #include <linux/arm-smccc.h>
 #include <linux/bitfield.h>
+#include <linux/clk.h>
 #include <linux/iopoll.h>
 #include <linux/module.h>
 #include <linux/of.h>
@@ -83,6 +84,7 @@ struct dvfsrc_opp_desc {
 struct dvfsrc_soc_data;
 struct mtk_dvfsrc {
 	struct device *dev;
+	struct clk *clk;
 	struct platform_device *icc;
 	struct platform_device *regulator;
 	const struct dvfsrc_soc_data *dvd;
@@ -650,6 +652,11 @@ static int mtk_dvfsrc_probe(struct platform_device *pdev)
 	if (IS_ERR(dvfsrc->regs))
 		return PTR_ERR(dvfsrc->regs);
 
+	dvfsrc->clk = devm_clk_get_enabled(&pdev->dev, NULL);
+	if (IS_ERR(dvfsrc->clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(dvfsrc->clk),
+				     "Couldn't get and enable DVFSRC clock\n");
+
 	arm_smccc_smc(MTK_SIP_DVFSRC_VCOREFS_CONTROL, MTK_SIP_DVFSRC_INIT,
 		      0, 0, 0, 0, 0, 0, &ares);
 	if (ares.a0)

-- 
2.51.2