include/linux/reset-controller.h

   1 #ifndef _LINUX_RESET_CONTROLLER_H_
   2 #define _LINUX_RESET_CONTROLLER_H_
   3
   4 #include <linux/list.h>
   5
   6 struct reset_controller_dev;
   7
   8 /**
   9  * struct reset_control_ops
  10  *
  11  * @reset: for self-deasserting resets, does all necessary
  12  *         things to reset the device
  13  * @assert: manually assert the reset line, if supported
  14  * @deassert: manually deassert the reset line, if supported
  15  */
  16 struct reset_control_ops {
  17         int (*reset)(struct reset_controller_dev *rcdev, unsigned long id);
  18         int (*assert)(struct reset_controller_dev *rcdev, unsigned long id);
  19         int (*deassert)(struct reset_controller_dev *rcdev, unsigned long id);
  20 };
  21
  22 struct module;
  23 struct device_node;
  24
  25 /**
  26  * struct reset_controller_dev - reset controller entity that might
  27  *                               provide multiple reset controls
  28  * @ops: a pointer to device specific struct reset_control_ops
  29  * @owner: kernel module of the reset controller driver
  30  * @list: internal list of reset controller devices
  31  * @of_node: corresponding device tree node as phandle target
  32  * @of_reset_n_cells: number of cells in reset line specifiers
  33  * @of_xlate: translation function to translate from specifier as found in the
  34  *            device tree to id as given to the reset control ops
  35  * @nr_resets: number of reset controls in this reset controller device
  36  */
  37 struct reset_controller_dev {
  38         struct reset_control_ops *ops;
  39         struct module *owner;
  40         struct list_head list;
  41         struct device_node *of_node;
  42         int of_reset_n_cells;
  43         int (*of_xlate)(struct reset_controller_dev *rcdev,
  44                         const struct of_phandle_args *reset_spec);
  45         unsigned int nr_resets;
  46 };
  47
  48 int reset_controller_register(struct reset_controller_dev *rcdev);
  49 void reset_controller_unregister(struct reset_controller_dev *rcdev);
  50
  51 #endif