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  * @status: return the status of the reset line, if supported
  16  */
  17 struct reset_control_ops {
  18         int (*reset)(struct reset_controller_dev *rcdev, unsigned long id);
  19         int (*assert)(struct reset_controller_dev *rcdev, unsigned long id);
  20         int (*deassert)(struct reset_controller_dev *rcdev, unsigned long id);
  21         int (*status)(struct reset_controller_dev *rcdev, unsigned long id);
  22 };
  23
  24 struct module;
  25 struct device_node;
  26 struct of_phandle_args;
  27
  28 /**
  29  * struct reset_controller_dev - reset controller entity that might
  30  *                               provide multiple reset controls
  31  * @ops: a pointer to device specific struct reset_control_ops
  32  * @owner: kernel module of the reset controller driver
  33  * @list: internal list of reset controller devices
  34  * @reset_control_head: head of internal list of requested reset controls
  35  * @of_node: corresponding device tree node as phandle target
  36  * @of_reset_n_cells: number of cells in reset line specifiers
  37  * @of_xlate: translation function to translate from specifier as found in the
  38  *            device tree to id as given to the reset control ops
  39  * @nr_resets: number of reset controls in this reset controller device
  40  */
  41 struct reset_controller_dev {
  42         const struct reset_control_ops *ops;
  43         struct module *owner;
  44         struct list_head list;
  45         struct list_head reset_control_head;
  46         struct device_node *of_node;
  47         int of_reset_n_cells;
  48         int (*of_xlate)(struct reset_controller_dev *rcdev,
  49                         const struct of_phandle_args *reset_spec);
  50         unsigned int nr_resets;
  51 };
  52
  53 int reset_controller_register(struct reset_controller_dev *rcdev);
  54 void reset_controller_unregister(struct reset_controller_dev *rcdev);
  55
  56 struct device;
  57 int devm_reset_controller_register(struct device *dev,
  58                                    struct reset_controller_dev *rcdev);
  59
  60 #endif