1 files changed, 234 insertions, 53 deletions

diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c
index a5d402de5584..de658c9e4c53 100644
--- a/drivers/clk/clk-fixed-factor.c
+++ b/drivers/clk/clk-fixed-factor.c
@@ -1,11 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2011 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Standard functionality for the common clock API.
  */
 #include <linux/module.h>
 #include <linux/clk-provider.h>
@@ -35,19 +30,21 @@ static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
 	return (unsigned long)rate;
 }
 
-static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
-				unsigned long *prate)
+static int clk_factor_determine_rate(struct clk_hw *hw,
+				     struct clk_rate_request *req)
 {
 	struct clk_fixed_factor *fix = to_clk_fixed_factor(hw);
 
 	if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) {
 		unsigned long best_parent;
 
-		best_parent = (rate / fix->mult) * fix->div;
-		*prate = clk_hw_round_rate(clk_hw_get_parent(hw), best_parent);
+		best_parent = (req->rate / fix->mult) * fix->div;
+		req->best_parent_rate = clk_hw_round_rate(clk_hw_get_parent(hw), best_parent);
 	}
 
-	return (*prate / fix->div) * fix->mult;
+	req->rate = (req->best_parent_rate / fix->div) * fix->mult;
+
+	return 0;
 }
 
 static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -55,30 +52,65 @@ static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate,
 {
 	/*
 	 * We must report success but we can do so unconditionally because
-	 * clk_factor_round_rate returns values that ensure this call is a
+	 * clk_factor_determine_rate returns values that ensure this call is a
 	 * nop.
 	 */
 
 	return 0;
 }
 
+static unsigned long clk_factor_recalc_accuracy(struct clk_hw *hw,
+						unsigned long parent_accuracy)
+{
+	struct clk_fixed_factor *fix = to_clk_fixed_factor(hw);
+
+	if (fix->flags & CLK_FIXED_FACTOR_FIXED_ACCURACY)
+		return fix->acc;
+
+	return parent_accuracy;
+}
+
 const struct clk_ops clk_fixed_factor_ops = {
-	.round_rate = clk_factor_round_rate,
+	.determine_rate = clk_factor_determine_rate,
 	.set_rate = clk_factor_set_rate,
 	.recalc_rate = clk_factor_recalc_rate,
+	.recalc_accuracy = clk_factor_recalc_accuracy,
 };
 EXPORT_SYMBOL_GPL(clk_fixed_factor_ops);
 
-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)
+static void devm_clk_hw_register_fixed_factor_release(struct device *dev, void *res)
+{
+	struct clk_fixed_factor *fix = res;
+
+	/*
+	 * We can not use clk_hw_unregister_fixed_factor, since it will kfree()
+	 * the hw, resulting in double free. Just unregister the hw and let
+	 * devres code kfree() it.
+	 */
+	clk_hw_unregister(&fix->hw);
+}
+
+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, 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_init_data init = { };
 	struct clk_hw *hw;
 	int ret;
 
-	fix = kmalloc(sizeof(*fix), GFP_KERNEL);
+	/* You can't use devm without a dev */
+	if (devm && !dev)
+		return ERR_PTR(-EINVAL);
+
+	if (devm)
+		fix = devres_alloc(devm_clk_hw_register_fixed_factor_release,
+				sizeof(*fix), GFP_KERNEL);
+	else
+		fix = kmalloc(sizeof(*fix), GFP_KERNEL);
 	if (!fix)
 		return ERR_PTR(-ENOMEM);
 
@@ -86,24 +118,142 @@ struct clk_hw *clk_hw_register_fixed_factor(struct device *dev,
 	fix->mult = mult;
 	fix->div = div;
 	fix->hw.init = &init;
+	fix->acc = acc;
+	fix->flags = fixflags;
 
 	init.name = name;
 	init.ops = &clk_fixed_factor_ops;
-	init.flags = flags | CLK_IS_BASIC;
-	init.parent_names = &parent_name;
+	init.flags = flags;
+	if (parent_name)
+		init.parent_names = &parent_name;
+	else if (parent_hw)
+		init.parent_hws = &parent_hw;
+	else
+		init.parent_data = pdata;
 	init.num_parents = 1;
 
 	hw = &fix->hw;
-	ret = clk_hw_register(dev, hw);
+	if (dev)
+		ret = clk_hw_register(dev, hw);
+	else
+		ret = of_clk_hw_register(np, hw);
 	if (ret) {
-		kfree(fix);
+		if (devm)
+			devres_free(fix);
+		else
+			kfree(fix);
 		hw = ERR_PTR(ret);
-	}
+	} else if (devm)
+		devres_add(dev, fix);
 
 	return hw;
 }
+
+/**
+ * devm_clk_hw_register_fixed_factor_index - Register a fixed factor clock with
+ * parent from DT index
+ * @dev: device that is registering this clock
+ * @name: name of this clock
+ * @index: index of phandle in @dev 'clocks' property
+ * @flags: fixed factor flags
+ * @mult: multiplier
+ * @div: divider
+ *
+ * Return: Pointer to fixed factor clk_hw structure that was registered or
+ * an error pointer.
+ */
+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)
+{
+	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);
+
+/**
+ * devm_clk_hw_register_fixed_factor_parent_hw - Register a fixed factor clock with
+ * pointer to parent clock
+ * @dev: device that is registering this clock
+ * @name: name of this clock
+ * @parent_hw: pointer to parent clk
+ * @flags: fixed factor flags
+ * @mult: multiplier
+ * @div: divider
+ *
+ * Return: Pointer to fixed factor clk_hw structure that was registered or
+ * an error pointer.
+ */
+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,
+					      &pdata, flags, mult, div, 0, 0, true);
+}
+EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor_parent_hw);
+
+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)
+{
+	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);
+
+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)
+{
+	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_hw *clk_hw_register_fixed_factor_index(struct device *dev,
+		const char *name, unsigned int index, unsigned long flags,
+		unsigned int mult, unsigned int div)
+{
+	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, false);
+}
+EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor_index);
+
 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)
@@ -142,55 +292,87 @@ void clk_hw_unregister_fixed_factor(struct clk_hw *hw)
 }
 EXPORT_SYMBOL_GPL(clk_hw_unregister_fixed_factor);
 
-#ifdef CONFIG_OF
-static const struct of_device_id set_rate_parent_matches[] = {
-	{ .compatible = "allwinner,sun4i-a10-pll3-2x-clk" },
-	{ /* Sentinel */ },
-};
+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)
+{
+	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);
 
-static struct clk *_of_fixed_factor_clk_setup(struct device_node *node)
+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 *clk;
+	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 char *parent_name;
-	unsigned long flags = 0;
+	const struct clk_parent_data pdata = { .index = 0 };
 	u32 div, mult;
 	int ret;
 
 	if (of_property_read_u32(node, "clock-div", &div)) {
-		pr_err("%s Fixed factor clock <%s> must have a clock-div property\n",
-			__func__, node->name);
+		pr_err("%s Fixed factor clock <%pOFn> must have a clock-div property\n",
+			__func__, node);
 		return ERR_PTR(-EIO);
 	}
 
 	if (of_property_read_u32(node, "clock-mult", &mult)) {
-		pr_err("%s Fixed factor clock <%s> must have a clock-mult property\n",
-			__func__, node->name);
+		pr_err("%s Fixed factor clock <%pOFn> must have a clock-mult property\n",
+			__func__, node);
 		return ERR_PTR(-EIO);
 	}
 
 	of_property_read_string(node, "clock-output-names", &clk_name);
-	parent_name = of_clk_get_parent_name(node, 0);
 
-	if (of_match_node(set_rate_parent_matches, node))
-		flags |= CLK_SET_RATE_PARENT;
-
-	clk = clk_register_fixed_factor(NULL, clk_name, parent_name, flags,
-					mult, div);
-	if (IS_ERR(clk))
-		return clk;
+	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
+		 * attempted again from probe function.
+		 */
+		of_node_clear_flag(node, OF_POPULATED);
+		return ERR_CAST(hw);
+	}
 
-	ret = of_clk_add_provider(node, of_clk_src_simple_get, clk);
+	ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, hw);
 	if (ret) {
-		clk_unregister(clk);
+		clk_hw_unregister_fixed_factor(hw);
 		return ERR_PTR(ret);
 	}
 
-	return clk;
+	return hw;
 }
 
 /**
  * of_fixed_factor_clk_setup() - Setup function for simple fixed factor clock
+ * @node:	device node for the clock
  */
 void __init of_fixed_factor_clk_setup(struct device_node *node)
 {
@@ -199,18 +381,17 @@ void __init of_fixed_factor_clk_setup(struct device_node *node)
 CLK_OF_DECLARE(fixed_factor_clk, "fixed-factor-clock",
 		of_fixed_factor_clk_setup);
 
-static int of_fixed_factor_clk_remove(struct platform_device *pdev)
+static void of_fixed_factor_clk_remove(struct platform_device *pdev)
 {
-	struct clk *clk = platform_get_drvdata(pdev);
+	struct clk_hw *clk = platform_get_drvdata(pdev);
 
-	clk_unregister_fixed_factor(clk);
-
-	return 0;
+	of_clk_del_provider(pdev->dev.of_node);
+	clk_hw_unregister_fixed_factor(clk);
 }
 
 static int of_fixed_factor_clk_probe(struct platform_device *pdev)
 {
-	struct clk *clk;
+	struct clk_hw *clk;
 
 	/*
 	 * This function is not executed when of_fixed_factor_clk_setup