linux-kernel - [PATCH 01/30] clk: mediatek: clk-pll: Add set/clr regs for shared PLL enable control

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Message-Id: <20250623102940.214269-2-laura.nao@collabora.com>
Date: Mon, 23 Jun 2025 12:29:11 +0200
From: Laura Nao <laura.nao@...labora.com>
To: mturquette@...libre.com,
	sboyd@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	matthias.bgg@...il.com,
	angelogioacchino.delregno@...labora.com,
	p.zabel@...gutronix.de,
	richardcochran@...il.com
Cc: guangjie.song@...iatek.com,
	wenst@...omium.org,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	netdev@...r.kernel.org,
	kernel@...labora.com,
	Laura Nao <laura.nao@...labora.com>
Subject: [PATCH 01/30] clk: mediatek: clk-pll: Add set/clr regs for shared PLL enable control

On MT8196, there are set/clr registers to control a shared PLL enable
register. These are intended to prevent different masters from
manipulating the PLLs independently. Add the corresponding en_set_reg
and en_clr_reg fields to the mtk_pll_data structure.

Signed-off-by: Laura Nao <laura.nao@...labora.com>
---
 drivers/clk/mediatek/clk-pll.c | 4 ++++
 drivers/clk/mediatek/clk-pll.h | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c
index ce453e1718e5..49ca25dd5418 100644
--- a/drivers/clk/mediatek/clk-pll.c
+++ b/drivers/clk/mediatek/clk-pll.c
@@ -308,6 +308,10 @@ struct clk_hw *mtk_clk_register_pll_ops(struct mtk_clk_pll *pll,
 		pll->en_addr = base + data->en_reg;
 	else
 		pll->en_addr = pll->base_addr + REG_CON0;
+	if (data->en_set_reg)
+		pll->en_set_addr = base + data->en_set_reg;
+	if (data->en_clr_reg)
+		pll->en_clr_addr = base + data->en_clr_reg;
 	pll->hw.init = &init;
 	pll->data = data;
 
diff --git a/drivers/clk/mediatek/clk-pll.h b/drivers/clk/mediatek/clk-pll.h
index 285c8db958b3..c4d06bb11516 100644
--- a/drivers/clk/mediatek/clk-pll.h
+++ b/drivers/clk/mediatek/clk-pll.h
@@ -47,6 +47,8 @@ struct mtk_pll_data {
 	const struct mtk_pll_div_table *div_table;
 	const char *parent_name;
 	u32 en_reg;
+	u32 en_set_reg;
+	u32 en_clr_reg;
 	u8 pll_en_bit; /* Assume 0, indicates BIT(0) by default */
 	u8 pcw_chg_bit;
 };
@@ -68,6 +70,8 @@ struct mtk_clk_pll {
 	void __iomem	*pcw_addr;
 	void __iomem	*pcw_chg_addr;
 	void __iomem	*en_addr;
+	void __iomem	*en_set_addr;
+	void __iomem	*en_clr_addr;
 	const struct mtk_pll_data *data;
 };
 
-- 
2.39.5