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author | Lucas Stach <dev@lynxeye.de> | 2014-05-14 22:45:28 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-05-15 14:17:11 +0200 |
commit | 45b95b50cd0b6fc587c459be4c2defce41ba4ac5 (patch) | |
tree | 63d5282bc2d874da16000dac0872cbc7c4ef84d7 /include/linux/reset-controller.h | |
parent | caa31714b55a542dad81d59c271c87fdadff6e1a (diff) | |
download | barebox-45b95b50cd0b6fc587c459be4c2defce41ba4ac5.tar.gz barebox-45b95b50cd0b6fc587c459be4c2defce41ba4ac5.tar.xz |
reset: add reset controller framework
Add stripped sown version of the reset controller
framework from the Linux kernel.
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include/linux/reset-controller.h')
-rw-r--r-- | include/linux/reset-controller.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/include/linux/reset-controller.h b/include/linux/reset-controller.h new file mode 100644 index 0000000000..d8265486a0 --- /dev/null +++ b/include/linux/reset-controller.h @@ -0,0 +1,50 @@ +#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 device_node; +struct of_phandle_args; + +/** + * 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 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 |