linux-kernel - [PATCH v8 1/6] clk: renesas: rzv2h-cpg: Add instance field to struct pll

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Message-ID: <20250903161718.180488-2-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Wed,  3 Sep 2025 17:17:13 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Andrzej Hajda <andrzej.hajda@...el.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>,
	Jonas Karlman <jonas@...boo.se>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Biju Das <biju.das.jz@...renesas.com>,
	Magnus Damm <magnus.damm@...il.com>
Cc: dri-devel@...ts.freedesktop.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	linux-clk@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v8 1/6] clk: renesas: rzv2h-cpg: Add instance field to struct pll

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Add a two-bit "instance" member to struct pll and extend the PLL_PACK()
macro to accept an instance parameter.  Initialize all existing PLL
definitions with instance 0 to preserve legacy behavior. This change
enables support for SoCs with multiple PLL instances (for example,
RZ/G3E we have two PLL DSIs).

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
v7->v8:
- Added reviewed-by tags from Geert and Biju

v6->v7:
- New patch
---
 drivers/clk/renesas/rzv2h-cpg.h | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/clk/renesas/rzv2h-cpg.h b/drivers/clk/renesas/rzv2h-cpg.h
index 840eed25aeda..e2053049c299 100644
--- a/drivers/clk/renesas/rzv2h-cpg.h
+++ b/drivers/clk/renesas/rzv2h-cpg.h
@@ -16,20 +16,23 @@
  *
  * @offset: STBY register offset
  * @has_clkn: Flag to indicate if CLK1/2 are accessible or not
+ * @instance: PLL instance number
  */
 struct pll {
 	unsigned int offset:9;
 	unsigned int has_clkn:1;
+	unsigned int instance:2;
 };
 
-#define PLL_PACK(_offset, _has_clkn) \
+#define PLL_PACK(_offset, _has_clkn, _instance) \
 	((struct pll){ \
 		.offset = _offset, \
-		.has_clkn = _has_clkn \
+		.has_clkn = _has_clkn, \
+		.instance = _instance \
 	})
 
-#define PLLCA55		PLL_PACK(0x60, 1)
-#define PLLGPU		PLL_PACK(0x120, 1)
+#define PLLCA55		PLL_PACK(0x60, 1, 0)
+#define PLLGPU		PLL_PACK(0x120, 1, 0)
 
 /**
  * struct ddiv - Structure for dynamic switching divider
-- 
2.51.0