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linux-sg2042/drivers/clk/clk.h

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clk: Provide not locked variant of of_clk_get_from_provider() Add helper functions for the of_clk_providers list locking and an unlocked variant of of_clk_get_from_provider(). These functions are intended to be used in the clkdev to avoid race condition in the device tree based clock look up in clk_get(). Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-08-23 23:03:43 +08:00
/*
* linux/drivers/clk/clk.h
*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
* Sylwester Nawrocki <s.nawrocki@samsung.com>
*
* 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.
*/
#if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK)
clk: Add of_clk_get_by_clkspec() helper This patch adds of_clk_get_by_clkspec() helper function, which does only a struct clk lookup from the clock providers. It is used in the subsequent patch where parsing of a clock from device tree and the lookup from providers needed to be split. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-05-20 01:22:50 +08:00
struct clk *of_clk_get_by_clkspec(struct of_phandle_args *clkspec);
clk: Provide not locked variant of of_clk_get_from_provider() Add helper functions for the of_clk_providers list locking and an unlocked variant of of_clk_get_from_provider(). These functions are intended to be used in the clkdev to avoid race condition in the device tree based clock look up in clk_get(). Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-08-23 23:03:43 +08:00
struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec);
void of_clk_lock(void);
void of_clk_unlock(void);
#endif