drivers/misc/gdsys_soc.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * (C) Copyright 2017
   4  * Mario Six,  Guntermann & Drunck GmbH, mario.six@gdsys.cc
   5  */
   6
   7 #ifndef _GDSYS_SOC_H_
   8 #define _GDSYS_SOC_H_
   9
  10 /**
  11  * gdsys_soc_get_fpga() - Retrieve pointer to parent bus' FPGA device
  12  * @child:      The child device on the FPGA bus needing access to the FPGA.
  13  * @fpga:       Pointer to the retrieved FPGA device.
  14  *
  15  * To access their register maps, devices on gdsys soc buses usually have
  16  * facilitate the accessor function of the IHS FPGA their parent bus is
  17  * attached to. To access the FPGA device from within the bus' children, this
  18  * function returns a pointer to it.
  19  *
  20  * Return: 0 on success, -ve on failure
  21  */
  22 int gdsys_soc_get_fpga(struct udevice *child, struct udevice **fpga);
  23 #endif /* _GDSYS_SOC_H_ */