linux-kernel - [PATCH 06/16] clk: samsung: artpec-8: Add clock support for CMU

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Message-Id: <20250710002047.1573841-7-ksk4725@coasia.com>
Date: Thu, 10 Jul 2025 09:20:36 +0900
From: ksk4725@...sia.com
To: Jesper Nilsson <jesper.nilsson@...s.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Tomasz Figa <tomasz.figa@...il.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Ravi Patel <ravi.patel@...sung.com>,
	SeonGu Kang <ksk4725@...sia.com>,
	SungMin Park <smn1196@...sia.com>
Cc: kenkim <kenkim@...sia.com>,
	Jongshin Park <pjsin865@...sia.com>,
	GunWoo Kim <gwk1013@...sia.com>,
	HaGyeong Kim <hgkim05@...sia.com>,
	GyoungBo Min <mingyoungbo@...sia.com>,
	Pankaj Dubey <pankaj.dubey@...sung.com>,
	Shradha Todi <shradha.t@...sung.com>,
	Inbaraj E <inbaraj.e@...sung.com>,
	Swathi K S <swathi.ks@...sung.com>,
	Hrishikesh <hrishikesh.d@...sung.com>,
	Dongjin Yang <dj76.yang@...sung.com>,
	Sang Min Kim <hypmean.kim@...sung.com>,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...s.com,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-gpio@...r.kernel.org,
	soc@...ts.linux.dev,
	Varada Pavani <v.pavani@...sung.com>
Subject: [PATCH 06/16] clk: samsung: artpec-8: Add clock support for CMU_BUS block

From: Hakyeong Kim <hgkim05@...sia.com>

Add clock support for below CMU block in ARTPEC-8 SoC.
 - CMU_BUS

Signed-off-by: Varada Pavani <v.pavani@...sung.com>
Signed-off-by: Hakyeong Kim <hgkim05@...sia.com>
---
 drivers/clk/samsung/clk-artpec8.c | 45 +++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/drivers/clk/samsung/clk-artpec8.c b/drivers/clk/samsung/clk-artpec8.c
index 1ef9e52ad24b..648abdd2f510 100644
--- a/drivers/clk/samsung/clk-artpec8.c
+++ b/drivers/clk/samsung/clk-artpec8.c
@@ -15,6 +15,7 @@
 
 /* NOTE: Must be equal to the last clock ID increased by one */
 #define CMU_CMU_NR_CLK			(DOUT_CLKCMU_VPP_CORE + 1)
+#define CMU_BUS_NR_CLK			(DOUT_CLK_BUS_PCLK + 1)
 #define CMU_IMEM_NR_CLK			(MOUT_IMEM_JPEG_USER + 1)
 
 /* register offset definitions for cmu_cmu (0x12400000) */
@@ -431,6 +432,50 @@ static void __init artpec8_clk_cmu_cmu_init(struct device_node *np)
 CLK_OF_DECLARE(artpec8_clk_cmu_cmu, "axis,artpec8-cmu-cmu",
 	       artpec8_clk_cmu_cmu_init);
 
+/* Register Offset definitions for CMU_BUS (0x12c10000) */
+#define PLL_CON0_MUX_CLK_BUS_ACLK_USER			0x0100
+#define PLL_CON0_MUX_CLK_BUS_DLP_USER			0x0120
+#define DIV_CLK_BUS_PCLK				0x1800
+
+static const unsigned long cmu_bus_clk_regs[] __initconst = {
+	PLL_CON0_MUX_CLK_BUS_ACLK_USER,
+	PLL_CON0_MUX_CLK_BUS_DLP_USER,
+	DIV_CLK_BUS_PCLK,
+};
+
+PNAME(mout_clk_bus_aclk_user_p) = { "fin_pll", "dout_clkcmu_bus_bus" };
+PNAME(mout_clk_bus_dlp_user_p) = { "fin_pll", "dout_clkcmu_bus_dlp" };
+
+static const struct samsung_mux_clock cmu_bus_mux_clks[] __initconst = {
+	MUX(MOUT_CLK_BUS_ACLK_USER, "mout_clk_bus_aclk_user",
+	    mout_clk_bus_aclk_user_p, PLL_CON0_MUX_CLK_BUS_ACLK_USER, 4, 1),
+	MUX(MOUT_CLK_BUS_DLP_USER, "mout_clk_bus_dlp_user",
+	    mout_clk_bus_dlp_user_p, PLL_CON0_MUX_CLK_BUS_DLP_USER, 4, 1),
+};
+
+static const struct samsung_div_clock cmu_bus_div_clks[] __initconst = {
+	DIV(DOUT_CLK_BUS_PCLK, "dout_clk_bus_pclk", "mout_clk_bus_aclk_user",
+	    DIV_CLK_BUS_PCLK, 0, 4),
+};
+
+static const struct samsung_cmu_info cmu_bus_info __initconst = {
+	.mux_clks		= cmu_bus_mux_clks,
+	.nr_mux_clks		= ARRAY_SIZE(cmu_bus_mux_clks),
+	.div_clks		= cmu_bus_div_clks,
+	.nr_div_clks		= ARRAY_SIZE(cmu_bus_div_clks),
+	.nr_clk_ids		= CMU_BUS_NR_CLK,
+	.clk_regs		= cmu_bus_clk_regs,
+	.nr_clk_regs		= ARRAY_SIZE(cmu_bus_clk_regs),
+};
+
+static void __init artpec8_clk_cmu_bus_init(struct device_node *np)
+{
+	samsung_cmu_register_one(np, &cmu_bus_info);
+}
+
+CLK_OF_DECLARE(artpec8_clk_cmu_bus, "axis,artpec8-cmu-bus",
+	       artpec8_clk_cmu_bus_init);
+
 /* Register Offset definitions for CMU_IMEM (0x10010000) */
 #define PLL_CON0_MUX_CLK_IMEM_ACLK_USER			0x0100
 #define PLL_CON0_MUX_CLK_IMEM_JPEG_USER			0x0120
-- 
2.34.1