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| author | Jon Hunter <jonathanh@nvidia.com> | 2016-03-15 11:33:40 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-03-17 02:32:04 +0100 |
| commit | 02113ba93ea414b7113d64e42b87dc0720e3e578 (patch) | |
| tree | d4a1c34d81214dbd79695c80b90a621d0d2f364f /include/linux/pm_clock.h | |
| parent | b562e44f507e863c6792946e4e1b1449fbbac85d (diff) | |
| download | lwn-02113ba93ea414b7113d64e42b87dc0720e3e578.tar.gz lwn-02113ba93ea414b7113d64e42b87dc0720e3e578.zip | |
PM / clk: Add support for obtaining clocks from device-tree
The PM clocks framework requires clients to pass either a con-id or a
valid clk pointer in order to add a clock to a device. Add a new
function of_pm_clk_add_clks() to allows device clocks to be retrieved
from device-tree and populated for a given device. Note that it is
not necessary to make the compilation of this new function dependent
upon CONFIG_OF because there are stubs functions for the device-tree
APIs used.
In order to handle errors encountered when adding clocks from
device-tree, add a function pm_clk_remove_clk() to remove any clocks
(using a pointer to the clk structure) that have been added
successfully before the error occurred.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/pm_clock.h')
| -rw-r--r-- | include/linux/pm_clock.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/pm_clock.h b/include/linux/pm_clock.h index 25266c600021..308d6044f153 100644 --- a/include/linux/pm_clock.h +++ b/include/linux/pm_clock.h @@ -42,7 +42,9 @@ extern int pm_clk_create(struct device *dev); extern void pm_clk_destroy(struct device *dev); extern int pm_clk_add(struct device *dev, const char *con_id); extern int pm_clk_add_clk(struct device *dev, struct clk *clk); +extern int of_pm_clk_add_clks(struct device *dev); extern void pm_clk_remove(struct device *dev, const char *con_id); +extern void pm_clk_remove_clk(struct device *dev, struct clk *clk); extern int pm_clk_suspend(struct device *dev); extern int pm_clk_resume(struct device *dev); #else @@ -69,11 +71,18 @@ static inline int pm_clk_add_clk(struct device *dev, struct clk *clk) { return -EINVAL; } +static inline int of_pm_clk_add_clks(struct device *dev) +{ + return -EINVAL; +} static inline void pm_clk_remove(struct device *dev, const char *con_id) { } #define pm_clk_suspend NULL #define pm_clk_resume NULL +static inline void pm_clk_remove_clk(struct device *dev, struct clk *clk) +{ +} #endif #ifdef CONFIG_HAVE_CLK |