linux-kernel - [PATCH 4/7] clk: ingenic: tcu: Embed syscore

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Message-ID: <20250217163713.211949-5-thierry.reding@gmail.com>
Date: Mon, 17 Feb 2025 17:37:10 +0100
From: Thierry Reding <thierry.reding@...il.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: x86@...nel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-riscv@...ts.infradead.org,
	linux-mips@...r.kernel.org,
	loongarch@...ts.linux.dev,
	linuxppc-dev@...ts.ozlabs.org,
	linux-sh@...r.kernel.org,
	linux-pci@...r.kernel.org,
	linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 4/7] clk: ingenic: tcu: Embed syscore_ops in TCU context

From: Thierry Reding <treding@...dia.com>

This enables the syscore callbacks to obtain the TCU context without
relying on a separate global variable.

Signed-off-by: Thierry Reding <treding@...dia.com>
---
 drivers/clk/ingenic/tcu.c | 54 ++++++++++++++++++---------------------
 1 file changed, 25 insertions(+), 29 deletions(-)

diff --git a/drivers/clk/ingenic/tcu.c b/drivers/clk/ingenic/tcu.c
index 85bd4bc73c1b..503a58d08224 100644
--- a/drivers/clk/ingenic/tcu.c
+++ b/drivers/clk/ingenic/tcu.c
@@ -53,9 +53,9 @@ struct ingenic_tcu {
 	struct clk *clk;
 
 	struct clk_hw_onecell_data *clocks;
-};
 
-static struct ingenic_tcu *ingenic_tcu;
+	struct syscore_ops syscore;
+};
 
 static inline struct ingenic_tcu_clk *to_tcu_clk(struct clk_hw *hw)
 {
@@ -332,6 +332,24 @@ static const struct of_device_id __maybe_unused ingenic_tcu_of_match[] __initcon
 	{ /* sentinel */ }
 };
 
+static int __maybe_unused tcu_pm_suspend(struct syscore_ops *ops)
+{
+	struct ingenic_tcu *tcu = container_of(ops, typeof(*tcu), syscore);
+
+	if (tcu->clk)
+		clk_disable(tcu->clk);
+
+	return 0;
+}
+
+static void __maybe_unused tcu_pm_resume(struct syscore_ops *ops)
+{
+	struct ingenic_tcu *tcu = container_of(ops, typeof(*tcu), syscore);
+
+	if (tcu->clk)
+		clk_enable(tcu->clk);
+}
+
 static int __init ingenic_tcu_probe(struct device_node *np)
 {
 	const struct of_device_id *id = of_match_node(ingenic_tcu_of_match, np);
@@ -430,7 +448,11 @@ static int __init ingenic_tcu_probe(struct device_node *np)
 		goto err_unregister_ost_clock;
 	}
 
-	ingenic_tcu = tcu;
+	if (IS_ENABLED(CONFIG_PM_SLEEP)) {
+		tcu->syscore.suspend = tcu_pm_suspend;
+		tcu->syscore.resume = tcu_pm_resume;
+		register_syscore_ops(&tcu->syscore);
+	}
 
 	return 0;
 
@@ -455,38 +477,12 @@ static int __init ingenic_tcu_probe(struct device_node *np)
 	return ret;
 }
 
-static int __maybe_unused tcu_pm_suspend(struct syscore_ops *ops)
-{
-	struct ingenic_tcu *tcu = ingenic_tcu;
-
-	if (tcu->clk)
-		clk_disable(tcu->clk);
-
-	return 0;
-}
-
-static void __maybe_unused tcu_pm_resume(struct syscore_ops *ops)
-{
-	struct ingenic_tcu *tcu = ingenic_tcu;
-
-	if (tcu->clk)
-		clk_enable(tcu->clk);
-}
-
-static struct syscore_ops __maybe_unused tcu_pm_ops = {
-	.suspend = tcu_pm_suspend,
-	.resume = tcu_pm_resume,
-};
-
 static void __init ingenic_tcu_init(struct device_node *np)
 {
 	int ret = ingenic_tcu_probe(np);
 
 	if (ret)
 		pr_crit("Failed to initialize TCU clocks: %d\n", ret);
-
-	if (IS_ENABLED(CONFIG_PM_SLEEP))
-		register_syscore_ops(&tcu_pm_ops);
 }
 
 CLK_OF_DECLARE_DRIVER(jz4740_cgu, "ingenic,jz4740-tcu", ingenic_tcu_init);
-- 
2.48.1