Received-SPF: pass (google.com: domain of linux-kernel+bounces-69415-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) client-ip=147.75.48.161;
From: Sam Protsenko <semen.protsenko@linaro.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
	Sylwester Nawrocki <s.nawrocki@samsung.com>,
	Chanwoo Choi <cw00.choi@samsung.com>
Cc: Alim Akhtar <alim.akhtar@samsung.com>,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>,
	Rob Herring <robh@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Tomasz Figa <tomasz.figa@gmail.com>,
	linux-samsung-soc@vger.kernel.org,
	linux-clk@vger.kernel.org,
	devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 09/16] clk: samsung: Pass register layout type explicitly to CLK_CPU()
Date: Fri, 16 Feb 2024 16:32:38 -0600
Message-Id: <20240216223245.12273-10-semen.protsenko@linaro.org>
In-Reply-To: <20240216223245.12273-1-semen.protsenko@linaro.org>
References: <20240216223245.12273-1-semen.protsenko@linaro.org>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

Make it more obvious which register layout should be used for a CPU
clock. It prepares clk-cpu.c for adding new chips support.

No functional change.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
---
 drivers/clk/samsung/clk-cpu.c        |  2 +-
 drivers/clk/samsung/clk-cpu.h        | 12 ++++++++++--
 drivers/clk/samsung/clk-exynos3250.c |  2 +-
 drivers/clk/samsung/clk-exynos4.c    |  6 +++---
 drivers/clk/samsung/clk-exynos5250.c |  3 ++-
 drivers/clk/samsung/clk-exynos5420.c |  8 ++++----
 drivers/clk/samsung/clk-exynos5433.c |  8 ++++----
 drivers/clk/samsung/clk.h            |  4 +++-
 8 files changed, 28 insertions(+), 17 deletions(-)

diff --git a/drivers/clk/samsung/clk-cpu.c b/drivers/clk/samsung/clk-cpu.c
index 4c46416281a3..21998c89b96d 100644
--- a/drivers/clk/samsung/clk-cpu.c
+++ b/drivers/clk/samsung/clk-cpu.c
@@ -464,7 +464,7 @@ static int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx,
 	cpuclk->lock = &ctx->lock;
 	cpuclk->flags = clk_data->flags;
 	cpuclk->clk_nb.notifier_call = exynos_cpuclk_notifier_cb;
-	if (clk_data->flags & CLK_CPU_HAS_E5433_REGS_LAYOUT) {
+	if (clk_data->reg_layout == CPUCLK_LAYOUT_E5433) {
 		cpuclk->pre_rate_cb = exynos5433_cpuclk_pre_rate_change;
 		cpuclk->post_rate_cb = exynos5433_cpuclk_post_rate_change;
 	} else {
diff --git a/drivers/clk/samsung/clk-cpu.h b/drivers/clk/samsung/clk-cpu.h
index ee57f3638fed..4382ab005ad3 100644
--- a/drivers/clk/samsung/clk-cpu.h
+++ b/drivers/clk/samsung/clk-cpu.h
@@ -12,8 +12,16 @@
 #define CLK_CPU_HAS_DIV1		BIT(0)
 /* When ALT parent is active, debug clocks need safe divider values */
 #define CLK_CPU_NEEDS_DEBUG_ALT_DIV	BIT(1)
-/* The CPU clock registers have Exynos5433-compatible layout */
-#define CLK_CPU_HAS_E5433_REGS_LAYOUT	BIT(2)
+
+/**
+ * enum exynos_cpuclk_layout - CPU clock registers layout compatibility
+ * @CPUCLK_LAYOUT_E4210: Exynos4210 compatible layout
+ * @CPUCLK_LAYOUT_E5433: Exynos5433 compatible layout
+ */
+enum exynos_cpuclk_layout {
+	CPUCLK_LAYOUT_E4210,
+	CPUCLK_LAYOUT_E5433,
+};
 
 /**
  * struct exynos_cpuclk_cfg_data - config data to setup cpu clocks
diff --git a/drivers/clk/samsung/clk-exynos3250.c b/drivers/clk/samsung/clk-exynos3250.c
index d1b72a75bc5a..bd017a68163d 100644
--- a/drivers/clk/samsung/clk-exynos3250.c
+++ b/drivers/clk/samsung/clk-exynos3250.c
@@ -773,7 +773,7 @@ static const struct exynos_cpuclk_cfg_data e3250_armclk_d[] __initconst = {
 
 static const struct samsung_cpu_clock exynos3250_cpu_clks[] __initconst = {
 	CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MPLL_USER_C,
-		CLK_CPU_HAS_DIV1, 0x14000, e3250_armclk_d),
+		CLK_CPU_HAS_DIV1, 0x14000, CPUCLK_LAYOUT_E4210, e3250_armclk_d),
 };
 
 static void __init exynos3_core_down_clock(void __iomem *reg_base)
diff --git a/drivers/clk/samsung/clk-exynos4.c b/drivers/clk/samsung/clk-exynos4.c
index 3d57020a620f..e1b7a5e0dbb8 100644
--- a/drivers/clk/samsung/clk-exynos4.c
+++ b/drivers/clk/samsung/clk-exynos4.c
@@ -1252,19 +1252,19 @@ static const struct exynos_cpuclk_cfg_data e4412_armclk_d[] __initconst = {
 static const struct samsung_cpu_clock exynos4210_cpu_clks[] __initconst = {
 	CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_SCLK_MPLL,
 		CLK_CPU_NEEDS_DEBUG_ALT_DIV | CLK_CPU_HAS_DIV1, 0x14000,
-		e4210_armclk_d),
+		CPUCLK_LAYOUT_E4210, e4210_armclk_d),
 };
 
 static const struct samsung_cpu_clock exynos4212_cpu_clks[] __initconst = {
 	CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MPLL_USER_C,
 		CLK_CPU_NEEDS_DEBUG_ALT_DIV | CLK_CPU_HAS_DIV1, 0x14000,
-		e4212_armclk_d),
+		CPUCLK_LAYOUT_E4210, e4212_armclk_d),
 };
 
 static const struct samsung_cpu_clock exynos4412_cpu_clks[] __initconst = {
 	CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MPLL_USER_C,
 		CLK_CPU_NEEDS_DEBUG_ALT_DIV | CLK_CPU_HAS_DIV1, 0x14000,
-		e4412_armclk_d),
+		CPUCLK_LAYOUT_E4210, e4412_armclk_d),
 };
 
 /* register exynos4 clocks */
diff --git a/drivers/clk/samsung/clk-exynos5250.c b/drivers/clk/samsung/clk-exynos5250.c
index 4953da754994..36d28d466da9 100644
--- a/drivers/clk/samsung/clk-exynos5250.c
+++ b/drivers/clk/samsung/clk-exynos5250.c
@@ -776,7 +776,8 @@ static const struct exynos_cpuclk_cfg_data exynos5250_armclk_d[] __initconst = {
 
 static const struct samsung_cpu_clock exynos5250_cpu_clks[] __initconst = {
 	CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MPLL,
-		CLK_CPU_HAS_DIV1, 0x0, exynos5250_armclk_d),
+		CLK_CPU_HAS_DIV1, 0x0, CPUCLK_LAYOUT_E4210,
+		exynos5250_armclk_d),
 };
 
 static const struct of_device_id ext_clk_match[] __initconst = {
diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index 531ef1c3fa30..f8cd28465b58 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -1555,16 +1555,16 @@ static const struct exynos_cpuclk_cfg_data exynos5420_kfcclk_d[] __initconst = {
 
 static const struct samsung_cpu_clock exynos5420_cpu_clks[] __initconst = {
 	CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MSPLL_CPU, 0,
-		0x0, exynos5420_eglclk_d),
+		0x0, CPUCLK_LAYOUT_E4210, exynos5420_eglclk_d),
 	CPU_CLK(CLK_KFC_CLK, "kfcclk", CLK_MOUT_KPLL, CLK_MOUT_MSPLL_KFC, 0,
-		0x28000, exynos5420_kfcclk_d),
+		0x28000, CPUCLK_LAYOUT_E4210, exynos5420_kfcclk_d),
 };
 
 static const struct samsung_cpu_clock exynos5800_cpu_clks[] __initconst = {
 	CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MSPLL_CPU, 0,
-		0x0, exynos5800_eglclk_d),
+		0x0, CPUCLK_LAYOUT_E4210, exynos5800_eglclk_d),
 	CPU_CLK(CLK_KFC_CLK, "kfcclk", CLK_MOUT_KPLL, CLK_MOUT_MSPLL_KFC, 0,
-		0x28000, exynos5420_kfcclk_d),
+		0x28000, CPUCLK_LAYOUT_E4210, exynos5420_kfcclk_d),
 };
 
 static const struct of_device_id ext_clk_match[] __initconst = {
diff --git a/drivers/clk/samsung/clk-exynos5433.c b/drivers/clk/samsung/clk-exynos5433.c
index 379744f0a5b6..d35901af21d0 100644
--- a/drivers/clk/samsung/clk-exynos5433.c
+++ b/drivers/clk/samsung/clk-exynos5433.c
@@ -3698,8 +3698,8 @@ static const struct exynos_cpuclk_cfg_data exynos5433_apolloclk_d[] __initconst
 
 static const struct samsung_cpu_clock apollo_cpu_clks[] __initconst = {
 	CPU_CLK(CLK_SCLK_APOLLO, "apolloclk", CLK_MOUT_APOLLO_PLL,
-		CLK_MOUT_BUS_PLL_APOLLO_USER, CLK_CPU_HAS_E5433_REGS_LAYOUT,
-		0x0, exynos5433_apolloclk_d),
+		CLK_MOUT_BUS_PLL_APOLLO_USER, 0, 0x0,
+		CPUCLK_LAYOUT_E5433, exynos5433_apolloclk_d),
 };
 
 static const struct samsung_cmu_info apollo_cmu_info __initconst = {
@@ -3942,8 +3942,8 @@ static const struct exynos_cpuclk_cfg_data exynos5433_atlasclk_d[] __initconst =
 
 static const struct samsung_cpu_clock atlas_cpu_clks[] __initconst = {
 	CPU_CLK(CLK_SCLK_ATLAS, "atlasclk", CLK_MOUT_ATLAS_PLL,
-		CLK_MOUT_BUS_PLL_ATLAS_USER, CLK_CPU_HAS_E5433_REGS_LAYOUT,
-		0x0, exynos5433_atlasclk_d),
+		CLK_MOUT_BUS_PLL_ATLAS_USER, 0, 0x0,
+		CPUCLK_LAYOUT_E5433, exynos5433_atlasclk_d),
 };
 
 static const struct samsung_cmu_info atlas_cmu_info __initconst = {
diff --git a/drivers/clk/samsung/clk.h b/drivers/clk/samsung/clk.h
index 8157479f45eb..87bbb8b31b03 100644
--- a/drivers/clk/samsung/clk.h
+++ b/drivers/clk/samsung/clk.h
@@ -283,10 +283,11 @@ struct samsung_cpu_clock {
 	unsigned int	alt_parent_id;
 	unsigned long	flags;
 	int		offset;
+	enum exynos_cpuclk_layout reg_layout;
 	const struct exynos_cpuclk_cfg_data *cfg;
 };
 
-#define CPU_CLK(_id, _name, _pid, _apid, _flags, _offset, _cfg) \
+#define CPU_CLK(_id, _name, _pid, _apid, _flags, _offset, _layout, _cfg) \
 	{							\
 		.id		  = _id,			\
 		.name		  = _name,			\
@@ -294,6 +295,7 @@ struct samsung_cpu_clock {
 		.alt_parent_id	  = _apid,			\
 		.flags		  = _flags,			\
 		.offset		  = _offset,			\
+		.reg_layout	  = _layout,			\
 		.cfg		  = _cfg,			\
 	}
 
-- 
2.39.2