diff options
| -rw-r--r-- | drivers/clk/clk.c | 36 | ||||
| -rw-r--r-- | include/linux/clk.h | 10 |
2 files changed, 46 insertions, 0 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 48931f442de8..6cf59e3c31b4 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -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) { diff --git a/include/linux/clk.h b/include/linux/clk.h index 7fd6a1febcf4..f53afdf8198b 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -110,6 +110,16 @@ 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. * @clk: clock source |