generic: 6.6: backport devm_clk_get_optional_enabled_with_rate

This is needed for mac80211 v6.14.5 update.

9934a1bd45b2b clk: provide devm_clk_get_optional_enabled_with_rate()

9934a1bd45

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

target/linux/generic/backport-6.6/920-v6.12-clk-provide-devm_clk_get_optional_enabled_with_rate.patch

@@ -0,0 +1,104 @@
+From 9934a1bd45b2b03f6d1204a6ae2780d3b009799f Mon Sep 17 00:00:00 2001
+From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
+Date: Mon, 5 Aug 2024 10:57:31 +0200
+Subject: [PATCH] clk: provide devm_clk_get_optional_enabled_with_rate()
+
+There are clock users in the kernel that can't use
+devm_clk_get_optional_enabled() as they need to set rate after getting
+the clock and before enabling it. Provide a managed helper that wraps
+these operations in the correct order.
+
+Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
+Link: https://lore.kernel.org/r/20240805-clk-new-helper-v2-1-e5fdd1e1d729@linaro.org
+Signed-off-by: Stephen Boyd <sboyd@kernel.org>
+---
+ drivers/clk/clk-devres.c | 28 ++++++++++++++++++++++++++++
+ include/linux/clk.h      | 33 +++++++++++++++++++++++++++++++++
+ 2 files changed, 61 insertions(+)
+
+--- a/drivers/clk/clk-devres.c
++++ b/drivers/clk/clk-devres.c
+@@ -99,6 +99,34 @@ struct clk *devm_clk_get_optional_enable
+ }
+ EXPORT_SYMBOL_GPL(devm_clk_get_optional_enabled);
+ 
++struct clk *devm_clk_get_optional_enabled_with_rate(struct device *dev,
++						    const char *id,
++						    unsigned long rate)
++{
++	struct clk *clk;
++	int ret;
++
++	clk = __devm_clk_get(dev, id, clk_get_optional, NULL,
++			     clk_disable_unprepare);
++	if (IS_ERR(clk))
++		return ERR_CAST(clk);
++
++	ret = clk_set_rate(clk, rate);
++	if (ret)
++		goto out_put_clk;
++
++	ret = clk_prepare_enable(clk);
++	if (ret)
++		goto out_put_clk;
++
++	return clk;
++
++out_put_clk:
++	devm_clk_put(dev, clk);
++	return ERR_PTR(ret);
++}
++EXPORT_SYMBOL_GPL(devm_clk_get_optional_enabled_with_rate);
++
+ struct clk_bulk_devres {
+ 	struct clk_bulk_data *clks;
+ 	int num_clks;
+--- a/include/linux/clk.h
++++ b/include/linux/clk.h
+@@ -608,6 +608,32 @@ struct clk *devm_clk_get_optional_prepar
+ struct clk *devm_clk_get_optional_enabled(struct device *dev, const char *id);
+ 
+ /**
++ * devm_clk_get_optional_enabled_with_rate - devm_clk_get_optional() +
++ *                                           clk_set_rate() +
++ *                                           clk_prepare_enable()
++ * @dev: device for clock "consumer"
++ * @id: clock consumer ID
++ * @rate: new clock rate
++ *
++ * Context: May sleep.
++ *
++ * Return: a struct clk corresponding to the clock producer, or
++ * valid IS_ERR() condition containing errno.  The implementation
++ * uses @dev and @id to determine the clock consumer, and thereby
++ * the clock producer.  If no such clk is found, it returns NULL
++ * which serves as a dummy clk.  That's the only difference compared
++ * to devm_clk_get_enabled().
++ *
++ * The returned clk (if valid) is prepared and enabled and rate was set.
++ *
++ * The clock will automatically be disabled, unprepared and freed
++ * when the device is unbound from the bus.
++ */
++struct clk *devm_clk_get_optional_enabled_with_rate(struct device *dev,
++						    const char *id,
++						    unsigned long rate);
++
++/**
+  * devm_get_clk_from_child - lookup and obtain a managed reference to a
+  *			     clock producer from child node.
+  * @dev: device for clock "consumer"
+@@ -948,6 +974,13 @@ static inline struct clk *devm_clk_get_o
+ {
+ 	return NULL;
+ }
++
++static inline struct clk *
++devm_clk_get_optional_enabled_with_rate(struct device *dev, const char *id,
++					unsigned long rate)
++{
++	return NULL;
++}
+ 
+ static inline int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
+ 						 struct clk_bulk_data *clks)