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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/drivers/clk/clk-fixed-rate.c
....@@ -1,10 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0
12 /*
23  * Copyright (C) 2010-2011 Canonical Ltd <jeremy.kerr@canonical.com>
34  * Copyright (C) 2011-2012 Mike Turquette, Linaro Ltd <mturquette@linaro.org>
4
- *
5
- * This program is free software; you can redistribute it and/or modify
6
- * it under the terms of the GNU General Public License version 2 as
7
- * published by the Free Software Foundation.
85  *
96  * Fixed rate clock implementation
107  */
....@@ -27,6 +24,8 @@
2724  * parent - fixed parent.  No clk_set_parent support
2825  */
2926 
27
+#define to_clk_fixed_rate(_hw) container_of(_hw, struct clk_fixed_rate, hw)
28
+
3029 static unsigned long clk_fixed_rate_recalc_rate(struct clk_hw *hw,
3130 		unsigned long parent_rate)
3231 {
....@@ -36,7 +35,12 @@
3635 static unsigned long clk_fixed_rate_recalc_accuracy(struct clk_hw *hw,
3736 		unsigned long parent_accuracy)
3837 {
39
-	return to_clk_fixed_rate(hw)->fixed_accuracy;
38
+	struct clk_fixed_rate *fixed = to_clk_fixed_rate(hw);
39
+
40
+	if (fixed->flags & CLK_FIXED_RATE_PARENT_ACCURACY)
41
+		return parent_accuracy;
42
+
43
+	return fixed->fixed_accuracy;
4044 }
4145 
4246 const struct clk_ops clk_fixed_rate_ops = {
....@@ -45,24 +49,17 @@
4549 };
4650 EXPORT_SYMBOL_GPL(clk_fixed_rate_ops);
4751 
48
-/**
49
- * clk_hw_register_fixed_rate_with_accuracy - register fixed-rate clock with
50
- * the clock framework
51
- * @dev: device that is registering this clock
52
- * @name: name of this clock
53
- * @parent_name: name of clock's parent
54
- * @flags: framework-specific flags
55
- * @fixed_rate: non-adjustable clock rate
56
- * @fixed_accuracy: non-adjustable clock rate
57
- */
58
-struct clk_hw *clk_hw_register_fixed_rate_with_accuracy(struct device *dev,
59
-		const char *name, const char *parent_name, unsigned long flags,
60
-		unsigned long fixed_rate, unsigned long fixed_accuracy)
52
+struct clk_hw *__clk_hw_register_fixed_rate(struct device *dev,
53
+		struct device_node *np, const char *name,
54
+		const char *parent_name, const struct clk_hw *parent_hw,
55
+		const struct clk_parent_data *parent_data, unsigned long flags,
56
+		unsigned long fixed_rate, unsigned long fixed_accuracy,
57
+		unsigned long clk_fixed_flags)
6158 {
6259 	struct clk_fixed_rate *fixed;
6360 	struct clk_hw *hw;
6461 	struct clk_init_data init = {};
65
-	int ret;
62
+	int ret = -EINVAL;
6663 
6764 	/* allocate fixed-rate clock */
6865 	fixed = kzalloc(sizeof(*fixed), GFP_KERNEL);
....@@ -71,18 +68,27 @@
7168 
7269 	init.name = name;
7370 	init.ops = &clk_fixed_rate_ops;
74
-	init.flags = flags | CLK_IS_BASIC;
75
-	init.parent_names = (parent_name ? &parent_name: NULL);
76
-	init.num_parents = (parent_name ? 1 : 0);
71
+	init.flags = flags;
72
+	init.parent_names = parent_name ? &parent_name : NULL;
73
+	init.parent_hws = parent_hw ? &parent_hw : NULL;
74
+	init.parent_data = parent_data;
75
+	if (parent_name || parent_hw || parent_data)
76
+		init.num_parents = 1;
77
+	else
78
+		init.num_parents = 0;
7779 
7880 	/* struct clk_fixed_rate assignments */
81
+	fixed->flags = clk_fixed_flags;
7982 	fixed->fixed_rate = fixed_rate;
8083 	fixed->fixed_accuracy = fixed_accuracy;
8184 	fixed->hw.init = &init;
8285 
8386 	/* register the clock */
8487 	hw = &fixed->hw;
85
-	ret = clk_hw_register(dev, hw);
88
+	if (dev || !np)
89
+		ret = clk_hw_register(dev, hw);
90
+	else if (np)
91
+		ret = of_clk_hw_register(np, hw);
8692 	if (ret) {
8793 		kfree(fixed);
8894 		hw = ERR_PTR(ret);
....@@ -90,46 +96,19 @@
9096 
9197 	return hw;
9298 }
93
-EXPORT_SYMBOL_GPL(clk_hw_register_fixed_rate_with_accuracy);
94
-
95
-struct clk *clk_register_fixed_rate_with_accuracy(struct device *dev,
96
-		const char *name, const char *parent_name, unsigned long flags,
97
-		unsigned long fixed_rate, unsigned long fixed_accuracy)
98
-{
99
-	struct clk_hw *hw;
100
-
101
-	hw = clk_hw_register_fixed_rate_with_accuracy(dev, name, parent_name,
102
-			flags, fixed_rate, fixed_accuracy);
103
-	if (IS_ERR(hw))
104
-		return ERR_CAST(hw);
105
-	return hw->clk;
106
-}
107
-EXPORT_SYMBOL_GPL(clk_register_fixed_rate_with_accuracy);
108
-
109
-/**
110
- * clk_hw_register_fixed_rate - register fixed-rate clock with the clock
111
- * framework
112
- * @dev: device that is registering this clock
113
- * @name: name of this clock
114
- * @parent_name: name of clock's parent
115
- * @flags: framework-specific flags
116
- * @fixed_rate: non-adjustable clock rate
117
- */
118
-struct clk_hw *clk_hw_register_fixed_rate(struct device *dev, const char *name,
119
-		const char *parent_name, unsigned long flags,
120
-		unsigned long fixed_rate)
121
-{
122
-	return clk_hw_register_fixed_rate_with_accuracy(dev, name, parent_name,
123
-						     flags, fixed_rate, 0);
124
-}
125
-EXPORT_SYMBOL_GPL(clk_hw_register_fixed_rate);
99
+EXPORT_SYMBOL_GPL(__clk_hw_register_fixed_rate);
126100 
127101 struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
128102 		const char *parent_name, unsigned long flags,
129103 		unsigned long fixed_rate)
130104 {
131
-	return clk_register_fixed_rate_with_accuracy(dev, name, parent_name,
132
-						     flags, fixed_rate, 0);
105
+	struct clk_hw *hw;
106
+
107
+	hw = clk_hw_register_fixed_rate_with_accuracy(dev, name, parent_name,
108
+						      flags, fixed_rate, 0);
109
+	if (IS_ERR(hw))
110
+		return ERR_CAST(hw);
111
+	return hw->clk;
133112 }
134113 EXPORT_SYMBOL_GPL(clk_register_fixed_rate);
135114 
....@@ -158,9 +137,9 @@
158137 EXPORT_SYMBOL_GPL(clk_hw_unregister_fixed_rate);
159138 
160139 #ifdef CONFIG_OF
161
-static struct clk *_of_fixed_clk_setup(struct device_node *node)
140
+static struct clk_hw *_of_fixed_clk_setup(struct device_node *node)
162141 {
163
-	struct clk *clk;
142
+	struct clk_hw *hw;
164143 	const char *clk_name = node->name;
165144 	u32 rate;
166145 	u32 accuracy = 0;
....@@ -173,22 +152,23 @@
173152 
174153 	of_property_read_string(node, "clock-output-names", &clk_name);
175154 
176
-	clk = clk_register_fixed_rate_with_accuracy(NULL, clk_name, NULL,
155
+	hw = clk_hw_register_fixed_rate_with_accuracy(NULL, clk_name, NULL,
177156 						    0, rate, accuracy);
178
-	if (IS_ERR(clk))
179
-		return clk;
157
+	if (IS_ERR(hw))
158
+		return hw;
180159 
181
-	ret = of_clk_add_provider(node, of_clk_src_simple_get, clk);
160
+	ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, hw);
182161 	if (ret) {
183
-		clk_unregister(clk);
162
+		clk_hw_unregister_fixed_rate(hw);
184163 		return ERR_PTR(ret);
185164 	}
186165 
187
-	return clk;
166
+	return hw;
188167 }
189168 
190169 /**
191170  * of_fixed_clk_setup() - Setup function for simple fixed rate clock
171
+ * @node:	device node for the clock
192172  */
193173 void __init of_fixed_clk_setup(struct device_node *node)
194174 {
....@@ -198,27 +178,27 @@
198178 
199179 static int of_fixed_clk_remove(struct platform_device *pdev)
200180 {
201
-	struct clk *clk = platform_get_drvdata(pdev);
181
+	struct clk_hw *hw = platform_get_drvdata(pdev);
202182 
203183 	of_clk_del_provider(pdev->dev.of_node);
204
-	clk_unregister_fixed_rate(clk);
184
+	clk_hw_unregister_fixed_rate(hw);
205185 
206186 	return 0;
207187 }
208188 
209189 static int of_fixed_clk_probe(struct platform_device *pdev)
210190 {
211
-	struct clk *clk;
191
+	struct clk_hw *hw;
212192 
213193 	/*
214194 	 * This function is not executed when of_fixed_clk_setup
215195 	 * succeeded.
216196 	 */
217
-	clk = _of_fixed_clk_setup(pdev->dev.of_node);
218
-	if (IS_ERR(clk))
219
-		return PTR_ERR(clk);
197
+	hw = _of_fixed_clk_setup(pdev->dev.of_node);
198
+	if (IS_ERR(hw))
199
+		return PTR_ERR(hw);
220200 
221
-	platform_set_drvdata(pdev, clk);
201
+	platform_set_drvdata(pdev, hw);
222202 
223203 	return 0;
224204 }
....@@ -227,7 +207,6 @@
227207 	{ .compatible = "fixed-clock" },
228208 	{ }
229209 };
230
-MODULE_DEVICE_TABLE(of, of_fixed_clk_ids);
231210 
232211 static struct platform_driver of_fixed_clk_driver = {
233212 	.driver = {