linux-kernel - [PATCH 04/16] clk: samsung: Reduce params count in exynos_register_cpu

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Message-Id: <20240216223245.12273-5-semen.protsenko@linaro.org>
Date: Fri, 16 Feb 2024 16:32:33 -0600
From: Sam Protsenko <semen.protsenko@...aro.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>
Cc: Alim Akhtar <alim.akhtar@...sung.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Tomasz Figa <tomasz.figa@...il.com>,
	linux-samsung-soc@...r.kernel.org,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 04/16] clk: samsung: Reduce params count in exynos_register_cpu_clock()

Pass CPU clock data structure to exynos_register_cpu_clock() instead of
passing its fields separately there. That simplifies the signature of
exynos_register_cpu_clock() and makes it easier to add more fields to
struct samsung_cpu_clock later. This style follows the example of
samsung_clk_register_pll().

No functional change.

Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
---
 drivers/clk/samsung/clk-cpu.c | 46 +++++++++++++++++------------------
 1 file changed, 23 insertions(+), 23 deletions(-)

diff --git a/drivers/clk/samsung/clk-cpu.c b/drivers/clk/samsung/clk-cpu.c
index 6412fd2580e0..7b6fd331a7ec 100644
--- a/drivers/clk/samsung/clk-cpu.c
+++ b/drivers/clk/samsung/clk-cpu.c
@@ -432,16 +432,19 @@ static int exynos5433_cpuclk_notifier_cb(struct notifier_block *nb,
 
 /* helper function to register a CPU clock */
 static int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx,
-		unsigned int lookup_id, const char *name,
-		const struct clk_hw *parent, const struct clk_hw *alt_parent,
-		unsigned long offset, const struct exynos_cpuclk_cfg_data *cfg,
-		unsigned long num_cfgs, unsigned long flags)
+				const struct samsung_cpu_clock *clk_data)
 {
+	const struct clk_hw *parent, *alt_parent;
+	struct clk_hw **hws;
 	struct exynos_cpuclk *cpuclk;
 	struct clk_init_data init;
 	const char *parent_name;
+	unsigned int num_cfgs;
 	int ret = 0;
 
+	hws = ctx->clk_data.hws;
+	parent = hws[clk_data->parent_id];
+	alt_parent = hws[clk_data->alt_parent_id];
 	if (IS_ERR(parent) || IS_ERR(alt_parent)) {
 		pr_err("%s: invalid parent clock(s)\n", __func__);
 		return -EINVAL;
@@ -453,7 +456,7 @@ static int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx,
 
 	parent_name = clk_hw_get_name(parent);
 
-	init.name = name;
+	init.name = clk_data->name;
 	init.flags = CLK_SET_RATE_PARENT;
 	init.parent_names = &parent_name;
 	init.num_parents = 1;
@@ -461,10 +464,10 @@ static int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx,
 
 	cpuclk->alt_parent = alt_parent;
 	cpuclk->hw.init = &init;
-	cpuclk->ctrl_base = ctx->reg_base + offset;
+	cpuclk->ctrl_base = ctx->reg_base + clk_data->offset;
 	cpuclk->lock = &ctx->lock;
-	cpuclk->flags = flags;
-	if (flags & CLK_CPU_HAS_E5433_REGS_LAYOUT)
+	cpuclk->flags = clk_data->flags;
+	if (clk_data->flags & CLK_CPU_HAS_E5433_REGS_LAYOUT)
 		cpuclk->clk_nb.notifier_call = exynos5433_cpuclk_notifier_cb;
 	else
 		cpuclk->clk_nb.notifier_call = exynos_cpuclk_notifier_cb;
@@ -472,11 +475,16 @@ static int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx,
 	ret = clk_notifier_register(parent->clk, &cpuclk->clk_nb);
 	if (ret) {
 		pr_err("%s: failed to register clock notifier for %s\n",
-		       __func__, name);
+		       __func__, clk_data->name);
 		goto free_cpuclk;
 	}
 
-	cpuclk->cfg = kmemdup(cfg, sizeof(*cfg) * num_cfgs, GFP_KERNEL);
+	/* Find count of configuration rates in cfg */
+	for (num_cfgs = 0; clk_data->cfg[num_cfgs].prate != 0; )
+		num_cfgs++;
+
+	cpuclk->cfg = kmemdup(clk_data->cfg, sizeof(*clk_data->cfg) * num_cfgs,
+			      GFP_KERNEL);
 	if (!cpuclk->cfg) {
 		ret = -ENOMEM;
 		goto unregister_clk_nb;
@@ -484,11 +492,12 @@ static int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx,
 
 	ret = clk_hw_register(NULL, &cpuclk->hw);
 	if (ret) {
-		pr_err("%s: could not register cpuclk %s\n", __func__, name);
+		pr_err("%s: could not register cpuclk %s\n", __func__,
+		       clk_data->name);
 		goto free_cpuclk_data;
 	}
 
-	samsung_clk_add_lookup(ctx, &cpuclk->hw, lookup_id);
+	samsung_clk_add_lookup(ctx, &cpuclk->hw, clk_data->id);
 	return 0;
 
 free_cpuclk_data:
@@ -504,16 +513,7 @@ void __init samsung_clk_register_cpu(struct samsung_clk_provider *ctx,
 		const struct samsung_cpu_clock *list, unsigned int nr_clk)
 {
 	unsigned int idx;
-	unsigned int num_cfgs;
-	struct clk_hw **hws = ctx->clk_data.hws;
 
-	for (idx = 0; idx < nr_clk; idx++, list++) {
-		/* find count of configuration rates in cfg */
-		for (num_cfgs = 0; list->cfg[num_cfgs].prate != 0; )
-			num_cfgs++;
-
-		exynos_register_cpu_clock(ctx, list->id, list->name,
-			hws[list->parent_id], hws[list->alt_parent_id],
-			list->offset, list->cfg, num_cfgs, list->flags);
-	}
+	for (idx = 0; idx < nr_clk; idx++)
+		exynos_register_cpu_clock(ctx, &list[idx]);
 }
-- 
2.39.2