diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/soc/ti/ti_sci_protocol.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/include/linux/soc/ti/ti_sci_protocol.h b/include/linux/soc/ti/ti_sci_protocol.h index dd88f646ed..b2a45cd9ae 100644 --- a/include/linux/soc/ti/ti_sci_protocol.h +++ b/include/linux/soc/ti/ti_sci_protocol.h @@ -58,11 +58,92 @@ struct ti_sci_board_ops { }; /** + * struct ti_sci_dev_ops - Device control operations + * @get_device: Command to request for device managed by TISCI + * Returns 0 for successful exclusive request, else returns + * corresponding error message. + * @idle_device: Command to idle a device managed by TISCI + * Returns 0 for successful exclusive request, else returns + * corresponding error message. + * @put_device: Command to release a device managed by TISCI + * Returns 0 for successful release, else returns corresponding + * error message. + * @is_valid: Check if the device ID is a valid ID. + * Returns 0 if the ID is valid, else returns corresponding error. + * @get_context_loss_count: Command to retrieve context loss counter - this + * increments every time the device looses context. Overflow + * is possible. + * - count: pointer to u32 which will retrieve counter + * Returns 0 for successful information request and count has + * proper data, else returns corresponding error message. + * @is_idle: Reports back about device idle state + * - req_state: Returns requested idle state + * Returns 0 for successful information request and req_state and + * current_state has proper data, else returns corresponding error + * message. + * @is_stop: Reports back about device stop state + * - req_state: Returns requested stop state + * - current_state: Returns current stop state + * Returns 0 for successful information request and req_state and + * current_state has proper data, else returns corresponding error + * message. + * @is_on: Reports back about device ON(or active) state + * - req_state: Returns requested ON state + * - current_state: Returns current ON state + * Returns 0 for successful information request and req_state and + * current_state has proper data, else returns corresponding error + * message. + * @is_transitioning: Reports back if the device is in the middle of transition + * of state. + * -current_state: Returns 'true' if currently transitioning. + * @set_device_resets: Command to configure resets for device managed by TISCI. + * -reset_state: Device specific reset bit field + * Returns 0 for successful request, else returns + * corresponding error message. + * @get_device_resets: Command to read state of resets for device managed + * by TISCI. + * -reset_state: pointer to u32 which will retrieve resets + * Returns 0 for successful request, else returns + * corresponding error message. + * + * NOTE: for all these functions, the following parameters are generic in + * nature: + * -handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle + * -id: Device Identifier + * + * Request for the device - NOTE: the client MUST maintain integrity of + * usage count by balancing get_device with put_device. No refcounting is + * managed by driver for that purpose. + */ +struct ti_sci_dev_ops { + int (*get_device)(const struct ti_sci_handle *handle, u32 id); + int (*idle_device)(const struct ti_sci_handle *handle, u32 id); + int (*put_device)(const struct ti_sci_handle *handle, u32 id); + int (*is_valid)(const struct ti_sci_handle *handle, u32 id); + int (*get_context_loss_count)(const struct ti_sci_handle *handle, + u32 id, u32 *count); + int (*is_idle)(const struct ti_sci_handle *handle, u32 id, + bool *requested_state); + int (*is_stop)(const struct ti_sci_handle *handle, u32 id, + bool *req_state, bool *current_state); + int (*is_on)(const struct ti_sci_handle *handle, u32 id, + bool *req_state, bool *current_state); + int (*is_transitioning)(const struct ti_sci_handle *handle, u32 id, + bool *current_state); + int (*set_device_resets)(const struct ti_sci_handle *handle, u32 id, + u32 reset_state); + int (*get_device_resets)(const struct ti_sci_handle *handle, u32 id, + u32 *reset_state); +}; + +/** * struct ti_sci_ops - Function support for TI SCI * @board_ops: Miscellaneous operations + * @dev_ops: Device specific operations */ struct ti_sci_ops { struct ti_sci_board_ops board_ops; + struct ti_sci_dev_ops dev_ops; }; /** |