diff options
author | Mark Brown <broonie@sirena.org.uk> | 2012-04-05 10:42:09 (GMT) |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-04-19 18:34:18 (GMT) |
commit | a8a97db984bdc5e89d42e41891543d2daaf314cb (patch) | |
tree | f265e535723e3e2b7011f7e16d782d24e3589e02 /drivers | |
parent | e816b57a337ea3b755de72bec38c10c864f23015 (diff) | |
download | linux-a8a97db984bdc5e89d42e41891543d2daaf314cb.tar.xz |
ARM: 7376/1: clkdev: Implement managed clk_get()
Allow clk API users to simplify their cleanup paths by providing a
managed version of clk_get() and clk_put().
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/clk/clkdev.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c index 6db161f..a9a1137 100644 --- a/drivers/clk/clkdev.c +++ b/drivers/clk/clkdev.c @@ -89,6 +89,51 @@ void clk_put(struct clk *clk) } EXPORT_SYMBOL(clk_put); +static void devm_clk_release(struct device *dev, void *res) +{ + clk_put(*(struct clk **)res); +} + +struct clk *devm_clk_get(struct device *dev, const char *id) +{ + struct clk **ptr, *clk; + + ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + clk = clk_get(dev, id); + if (!IS_ERR(clk)) { + *ptr = clk; + devres_add(dev, ptr); + } else { + devres_free(ptr); + } + + return clk; +} +EXPORT_SYMBOL(devm_clk_get); + +static int devm_clk_match(struct device *dev, void *res, void *data) +{ + struct clk **c = res; + if (!c || !*c) { + WARN_ON(!c || !*c); + return 0; + } + return *c == data; +} + +void devm_clk_put(struct device *dev, struct clk *clk) +{ + int ret; + + ret = devres_destroy(dev, devm_clk_release, devm_clk_match, clk); + + WARN_ON(ret); +} +EXPORT_SYMBOL(devm_clk_put); + void clkdev_add(struct clk_lookup *cl) { mutex_lock(&clocks_mutex); |