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From: =?utf-8?q?Th=C3=A9o_Lebrun?= <theo.lebrun@bootlin.com>
Date: Wed, 27 Dec 2023 17:23:52 +0100
Subject: [PATCH v2 2/6] clk: fixed-factor: add fwname-based constructor
 functions
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Message-Id: <20231227-mbly-clk-v2-2-a05db63c380f@bootlin.com>
References: <20231227-mbly-clk-v2-0-a05db63c380f@bootlin.com>
In-Reply-To: <20231227-mbly-clk-v2-0-a05db63c380f@bootlin.com>
To: Gregory CLEMENT <gregory.clement@bootlin.com>, 
 Michael Turquette <mturquette@baylibre.com>, 
 Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, 
 Conor Dooley <conor+dt@kernel.org>, 
 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Vladimir Kondratiev <vladimir.kondratiev@mobileye.com>, 
 linux-mips@vger.kernel.org, linux-clk@vger.kernel.org, 
 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, 
 Thomas Petazzoni <thomas.petazzoni@bootlin.com>, 
 Tawfik Bayouk <tawfik.bayouk@mobileye.com>, 
 =?utf-8?q?Th=C3=A9o_Lebrun?= <theo.lebrun@bootlin.com>

Add four functions to register clk_hw based on the fw_name field in
clk_parent_data, ie the value in the DT property `clock-names`.

There are variants for devm or not and passing an accuracy or not
passing one:

 - clk_hw_register_fixed_factor_fwname
 - clk_hw_register_fixed_factor_with_accuracy_fwname
 - devm_clk_hw_register_fixed_factor_fwname
 - devm_clk_hw_register_fixed_factor_with_accuracy_fwname

The `struct clk_parent_data` init is extracted from
__clk_hw_register_fixed_factor to each calling function. It is required
to allow each function to pass whatever field they want, not only index.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
---
 drivers/clk/clk-fixed-factor.c | 76 ++++++++++++++++++++++++++++++++++--------
 include/linux/clk-provider.h   | 14 ++++++++
 2 files changed, 76 insertions(+), 14 deletions(-)

diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c
index bc2644a9bd7d..5fa03ae1bbdb 100644
--- a/drivers/clk/clk-fixed-factor.c
+++ b/drivers/clk/clk-fixed-factor.c
@@ -91,13 +91,12 @@ static void devm_clk_hw_register_fixed_factor_release(struct device *dev, void *
 static struct clk_hw *
 __clk_hw_register_fixed_factor(struct device *dev, struct device_node *np,
 		const char *name, const char *parent_name,
-		const struct clk_hw *parent_hw, int index,
+		const struct clk_hw *parent_hw, const struct clk_parent_data *pdata,
 		unsigned long flags, unsigned int mult, unsigned int div,
 		unsigned long acc, unsigned int fixflags, bool devm)
 {
 	struct clk_fixed_factor *fix;
 	struct clk_init_data init = { };
-	struct clk_parent_data pdata = { .index = index };
 	struct clk_hw *hw;
 	int ret;
 
@@ -128,7 +127,7 @@ __clk_hw_register_fixed_factor(struct device *dev, struct device_node *np,
 	else if (parent_hw)
 		init.parent_hws = &parent_hw;
 	else
-		init.parent_data = &pdata;
+		init.parent_data = pdata;
 	init.num_parents = 1;
 
 	hw = &fix->hw;
@@ -165,7 +164,8 @@ struct clk_hw *devm_clk_hw_register_fixed_factor_index(struct device *dev,
 		const char *name, unsigned int index, unsigned long flags,
 		unsigned int mult, unsigned int div)
 {
-	return __clk_hw_register_fixed_factor(dev, NULL, name, NULL, NULL, index,
+	const struct clk_parent_data pdata = { .index = index };
+	return __clk_hw_register_fixed_factor(dev, NULL, name, NULL, NULL, &pdata,
 					      flags, mult, div, 0, 0, true);
 }
 EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor_index);
@@ -187,8 +187,9 @@ struct clk_hw *devm_clk_hw_register_fixed_factor_parent_hw(struct device *dev,
 		const char *name, const struct clk_hw *parent_hw,
 		unsigned long flags, unsigned int mult, unsigned int div)
 {
+	const struct clk_parent_data pdata = { .index = -1 };
 	return __clk_hw_register_fixed_factor(dev, NULL, name, NULL, parent_hw,
-					      -1, flags, mult, div, 0, 0, true);
+					      &pdata, flags, mult, div, 0, 0, true);
 }
 EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor_parent_hw);
 
@@ -196,9 +197,9 @@ struct clk_hw *clk_hw_register_fixed_factor_parent_hw(struct device *dev,
 		const char *name, const struct clk_hw *parent_hw,
 		unsigned long flags, unsigned int mult, unsigned int div)
 {
-	return __clk_hw_register_fixed_factor(dev, NULL, name, NULL,
-					      parent_hw, -1, flags, mult, div,
-					      0, 0, false);
+	const struct clk_parent_data pdata = { .index = -1 };
+	return __clk_hw_register_fixed_factor(dev, NULL, name, NULL, parent_hw,
+					      &pdata, flags, mult, div, 0, 0, false);
 }
 EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor_parent_hw);
 
@@ -206,11 +207,34 @@ struct clk_hw *clk_hw_register_fixed_factor(struct device *dev,
 		const char *name, const char *parent_name, unsigned long flags,
 		unsigned int mult, unsigned int div)
 {
-	return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL, -1,
-					      flags, mult, div, 0, 0, false);
+	const struct clk_parent_data pdata = { .index = -1 };
+	return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL,
+					      &pdata, flags, mult, div, 0, 0, false);
 }
 EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor);
 
+struct clk_hw *clk_hw_register_fixed_factor_fwname(struct device *dev,
+		struct device_node *np, const char *name, const char *fw_name,
+		unsigned long flags, unsigned int mult, unsigned int div)
+{
+	const struct clk_parent_data pdata = { .index = -1, .fw_name = fw_name };
+	return __clk_hw_register_fixed_factor(dev, np, name, NULL, NULL,
+			&pdata, flags, mult, div, 0, 0, false);
+}
+EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor_fwname);
+
+struct clk_hw *clk_hw_register_fixed_factor_with_accuracy_fwname(struct device *dev,
+		struct device_node *np, const char *name, const char *fw_name,
+		unsigned long flags, unsigned int mult, unsigned int div,
+		unsigned long acc)
+{
+	const struct clk_parent_data pdata = { .index = -1, .fw_name = fw_name };
+	return __clk_hw_register_fixed_factor(dev, np, name, NULL, NULL,
+			&pdata, flags, mult, div, acc,
+			CLK_FIXED_FACTOR_FIXED_ACCURACY, false);
+}
+EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor_with_accuracy_fwname);
+
 struct clk *clk_register_fixed_factor(struct device *dev, const char *name,
 		const char *parent_name, unsigned long flags,
 		unsigned int mult, unsigned int div)
@@ -253,16 +277,40 @@ struct clk_hw *devm_clk_hw_register_fixed_factor(struct device *dev,
 		const char *name, const char *parent_name, unsigned long flags,
 		unsigned int mult, unsigned int div)
 {
-	return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL, -1,
-			flags, mult, div, 0, 0, true);
+	const struct clk_parent_data pdata = { .index = -1 };
+	return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL,
+			&pdata, flags, mult, div, 0, 0, true);
 }
 EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor);
 
+struct clk_hw *devm_clk_hw_register_fixed_factor_fwname(struct device *dev,
+		struct device_node *np, const char *name, const char *fw_name,
+		unsigned long flags, unsigned int mult, unsigned int div)
+{
+	const struct clk_parent_data pdata = { .index = -1, .fw_name = fw_name };
+	return __clk_hw_register_fixed_factor(dev, np, name, NULL, NULL,
+			&pdata, flags, mult, div, 0, 0, true);
+}
+EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor_fwname);
+
+struct clk_hw *devm_clk_hw_register_fixed_factor_with_accuracy_fwname(struct device *dev,
+		struct device_node *np, const char *name, const char *fw_name,
+		unsigned long flags, unsigned int mult, unsigned int div,
+		unsigned long acc)
+{
+	const struct clk_parent_data pdata = { .index = -1, .fw_name = fw_name };
+	return __clk_hw_register_fixed_factor(dev, np, name, NULL, NULL,
+			&pdata, flags, mult, div, acc,
+			CLK_FIXED_FACTOR_FIXED_ACCURACY, true);
+}
+EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor_with_accuracy_fwname);
+
 #ifdef CONFIG_OF
 static struct clk_hw *_of_fixed_factor_clk_setup(struct device_node *node)
 {
 	struct clk_hw *hw;
 	const char *clk_name = node->name;
+	const struct clk_parent_data pdata = { .index = 0 };
 	u32 div, mult;
 	int ret;
 
@@ -280,8 +328,8 @@ static struct clk_hw *_of_fixed_factor_clk_setup(struct device_node *node)
 
 	of_property_read_string(node, "clock-output-names", &clk_name);
 
-	hw = __clk_hw_register_fixed_factor(NULL, node, clk_name, NULL, NULL, 0,
-					    0, mult, div, 0, 0, false);
+	hw = __clk_hw_register_fixed_factor(NULL, node, clk_name, NULL, NULL,
+					    &pdata, 0, mult, div, 0, 0, false);
 	if (IS_ERR(hw)) {
 		/*
 		 * Clear OF_POPULATED flag so that clock registration can be
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 7ddc952c8c67..4a537260f655 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -1116,10 +1116,24 @@ void clk_unregister_fixed_factor(struct clk *clk);
 struct clk_hw *clk_hw_register_fixed_factor(struct device *dev,
 		const char *name, const char *parent_name, unsigned long flags,
 		unsigned int mult, unsigned int div);
+struct clk_hw *clk_hw_register_fixed_factor_fwname(struct device *dev,
+		struct device_node *np, const char *name, const char *fw_name,
+		unsigned long flags, unsigned int mult, unsigned int div);
+struct clk_hw *clk_hw_register_fixed_factor_with_accuracy_fwname(struct device *dev,
+		struct device_node *np, const char *name, const char *fw_name,
+		unsigned long flags, unsigned int mult, unsigned int div,
+		unsigned long acc);
 void clk_hw_unregister_fixed_factor(struct clk_hw *hw);
 struct clk_hw *devm_clk_hw_register_fixed_factor(struct device *dev,
 		const char *name, const char *parent_name, unsigned long flags,
 		unsigned int mult, unsigned int div);
+struct clk_hw *devm_clk_hw_register_fixed_factor_fwname(struct device *dev,
+		struct device_node *np, const char *name, const char *fw_name,
+		unsigned long flags, unsigned int mult, unsigned int div);
+struct clk_hw *devm_clk_hw_register_fixed_factor_with_accuracy_fwname(struct device *dev,
+		struct device_node *np, const char *name, const char *fw_name,
+		unsigned long flags, unsigned int mult, unsigned int div,
+		unsigned long acc);
 struct clk_hw *devm_clk_hw_register_fixed_factor_index(struct device *dev,
 		const char *name, unsigned int index, unsigned long flags,
 		unsigned int mult, unsigned int div);

-- 
2.43.0