clk: add devm variant of clk_notifier_register (6d30d50d) · Commits · 戴 / test

drivers/clk/clk.c

+36 −0

Original line number	Diff line number	Diff line
		@@ -4395,6 +4395,42 @@ int clk_notifier_unregister(struct clk clk, struct notifier_block nb)
		}
		EXPORT_SYMBOL_GPL(clk_notifier_unregister);

		struct clk_notifier_devres {
		struct clk *clk;
		struct notifier_block *nb;
		};

		static void devm_clk_notifier_release(struct device dev, void res)
		{
		struct clk_notifier_devres *devres = res;

		clk_notifier_unregister(devres->clk, devres->nb);
		}

		int devm_clk_notifier_register(struct device dev, struct clk clk,
		struct notifier_block *nb)
		{
		struct clk_notifier_devres *devres;
		int ret;

		devres = devres_alloc(devm_clk_notifier_release,
		sizeof(*devres), GFP_KERNEL);

		if (!devres)
		return -ENOMEM;

		ret = clk_notifier_register(clk, nb);
		if (!ret) {
		devres->clk = clk;
		devres->nb = nb;
		} else {
		devres_free(devres);
		}

		return ret;
		}
		EXPORT_SYMBOL_GPL(devm_clk_notifier_register);

		#ifdef CONFIG_OF
		static void clk_core_reparent_orphans(void)
		{

+10 −0

Original line number	Diff line number	Diff line
		@@ -109,6 +109,16 @@ int clk_notifier_register(struct clk clk, struct notifier_block nb);
		*/
		int clk_notifier_unregister(struct clk clk, struct notifier_block nb);

		/**
		* devm_clk_notifier_register - register a managed rate-change notifier callback
		* @dev: device for clock "consumer"
		* @clk: clock whose rate we are interested in
		* @nb: notifier block with callback function pointer
		*
		* Returns 0 on success, -EERROR otherwise
		*/
		int devm_clk_notifier_register(struct device dev, struct clk clk, struct notifier_block *nb);

		/**
		* clk_get_accuracy - obtain the clock accuracy in ppb (parts per billion)
		* for a clock source.