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author | Olof Johansson <olof@lixom.net> | 2013-04-13 06:06:37 (GMT) |
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committer | Olof Johansson <olof@lixom.net> | 2013-04-13 06:14:09 (GMT) |
commit | c4c54da24b8ae12abb2034edaf08021894caf0d0 (patch) | |
tree | 1b32092803e05b433f124785ae1eb59ca5bd4df2 /include | |
parent | 06ff14c05426ec7b7600521c4e1ae19732797e15 (diff) | |
parent | 6034bb22d8387708075c083385e5d2e1072a4f33 (diff) | |
download | linux-fsl-qoriq-c4c54da24b8ae12abb2034edaf08021894caf0d0.tar.xz |
Merge branch 'reset/for_v3.10' of git://git.pengutronix.de/git/pza/linux into next/drivers
From Philipp Zabel, this is a series that adds a simple API for devices
to request being reset by a separate reset controller hardware, and
it implements reset signal device tree bindings.
* 'reset/for_v3.10' of git://git.pengutronix.de/git/pza/linux:
reset: NULL deref on allocation failure
reset: Add reset controller API
dt: describe base reset signal binding
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/reset-controller.h | 51 | ||||
-rw-r--r-- | include/linux/reset.h | 17 |
2 files changed, 68 insertions, 0 deletions
diff --git a/include/linux/reset-controller.h b/include/linux/reset-controller.h new file mode 100644 index 0000000..2f61311 --- /dev/null +++ b/include/linux/reset-controller.h @@ -0,0 +1,51 @@ +#ifndef _LINUX_RESET_CONTROLLER_H_ +#define _LINUX_RESET_CONTROLLER_H_ + +#include <linux/list.h> + +struct reset_controller_dev; + +/** + * struct reset_control_ops + * + * @reset: for self-deasserting resets, does all necessary + * things to reset the device + * @assert: manually assert the reset line, if supported + * @deassert: manually deassert the reset line, if supported + */ +struct reset_control_ops { + int (*reset)(struct reset_controller_dev *rcdev, unsigned long id); + int (*assert)(struct reset_controller_dev *rcdev, unsigned long id); + int (*deassert)(struct reset_controller_dev *rcdev, unsigned long id); +}; + +struct module; +struct device_node; + +/** + * struct reset_controller_dev - reset controller entity that might + * provide multiple reset controls + * @ops: a pointer to device specific struct reset_control_ops + * @owner: kernel module of the reset controller driver + * @list: internal list of reset controller devices + * @of_node: corresponding device tree node as phandle target + * @of_reset_n_cells: number of cells in reset line specifiers + * @of_xlate: translation function to translate from specifier as found in the + * device tree to id as given to the reset control ops + * @nr_resets: number of reset controls in this reset controller device + */ +struct reset_controller_dev { + struct reset_control_ops *ops; + struct module *owner; + struct list_head list; + struct device_node *of_node; + int of_reset_n_cells; + int (*of_xlate)(struct reset_controller_dev *rcdev, + const struct of_phandle_args *reset_spec); + unsigned int nr_resets; +}; + +int reset_controller_register(struct reset_controller_dev *rcdev); +void reset_controller_unregister(struct reset_controller_dev *rcdev); + +#endif diff --git a/include/linux/reset.h b/include/linux/reset.h new file mode 100644 index 0000000..6082247 --- /dev/null +++ b/include/linux/reset.h @@ -0,0 +1,17 @@ +#ifndef _LINUX_RESET_H_ +#define _LINUX_RESET_H_ + +struct device; +struct reset_control; + +int reset_control_reset(struct reset_control *rstc); +int reset_control_assert(struct reset_control *rstc); +int reset_control_deassert(struct reset_control *rstc); + +struct reset_control *reset_control_get(struct device *dev, const char *id); +void reset_control_put(struct reset_control *rstc); +struct reset_control *devm_reset_control_get(struct device *dev, const char *id); + +int device_reset(struct device *dev); + +#endif |