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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-05-01 19:36:57 +0900 |
|---|---|---|
| committer | Philipp Zabel <p.zabel@pengutronix.de> | 2016-05-30 09:37:47 +0200 |
| commit | 8d5b5d5ce58ee1b90110f4e358eefe3c3a6b08a2 (patch) | |
| tree | d91f638964d516a2a0dd7eee28e1e02f24e069b6 | |
| parent | 1a695a905c18548062509178b98bc91e67510864 (diff) | |
| download | lwn-8d5b5d5ce58ee1b90110f4e358eefe3c3a6b08a2.tar.gz lwn-8d5b5d5ce58ee1b90110f4e358eefe3c3a6b08a2.zip | |
reset: add devm_reset_controller_register API
Add a device managed API for reset_controller_register().
This helps in reducing code in .remove callbacks and sometimes
dropping .remove callbacks entirely.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
| -rw-r--r-- | Documentation/driver-model/devres.txt | 4 | ||||
| -rw-r--r-- | drivers/reset/core.c | 37 | ||||
| -rw-r--r-- | include/linux/reset-controller.h | 4 |
3 files changed, 45 insertions, 0 deletions
diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt index c63eea0c1c8c..f5e522342ee5 100644 --- a/Documentation/driver-model/devres.txt +++ b/Documentation/driver-model/devres.txt @@ -352,6 +352,10 @@ REGULATOR devm_regulator_put() devm_regulator_register() +RESET + devm_reset_control_get() + devm_reset_controller_register() + SLAVE DMA ENGINE devm_acpi_dma_controller_register() diff --git a/drivers/reset/core.c b/drivers/reset/core.c index 72b32bd15549..395dc9ce492e 100644 --- a/drivers/reset/core.c +++ b/drivers/reset/core.c @@ -93,6 +93,43 @@ void reset_controller_unregister(struct reset_controller_dev *rcdev) } EXPORT_SYMBOL_GPL(reset_controller_unregister); +static void devm_reset_controller_release(struct device *dev, void *res) +{ + reset_controller_unregister(*(struct reset_controller_dev **)res); +} + +/** + * devm_reset_controller_register - resource managed reset_controller_register() + * @dev: device that is registering this reset controller + * @rcdev: a pointer to the initialized reset controller device + * + * Managed reset_controller_register(). For reset controllers registered by + * this function, reset_controller_unregister() is automatically called on + * driver detach. See reset_controller_register() for more information. + */ +int devm_reset_controller_register(struct device *dev, + struct reset_controller_dev *rcdev) +{ + struct reset_controller_dev **rcdevp; + int ret; + + rcdevp = devres_alloc(devm_reset_controller_release, sizeof(*rcdevp), + GFP_KERNEL); + if (!rcdevp) + return -ENOMEM; + + ret = reset_controller_register(rcdev); + if (!ret) { + *rcdevp = rcdev; + devres_add(dev, rcdevp); + } else { + devres_free(rcdevp); + } + + return ret; +} +EXPORT_SYMBOL_GPL(devm_reset_controller_register); + /** * reset_control_reset - reset the controlled device * @rstc: reset controller diff --git a/include/linux/reset-controller.h b/include/linux/reset-controller.h index b91ba932bbd4..db1fe6772ad5 100644 --- a/include/linux/reset-controller.h +++ b/include/linux/reset-controller.h @@ -53,4 +53,8 @@ struct reset_controller_dev { int reset_controller_register(struct reset_controller_dev *rcdev); void reset_controller_unregister(struct reset_controller_dev *rcdev); +struct device; +int devm_reset_controller_register(struct device *dev, + struct reset_controller_dev *rcdev); + #endif |