arch/m68k/include/asm/mcfqspi.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Definitions for Freescale Coldfire QSPI module
   4  *
   5  * Copyright 2010 Steven King <sfking@fdwdc.com>
   6 */
   7
   8 #ifndef mcfqspi_h
   9 #define mcfqspi_h
  10
  11 /**
  12  * struct mcfqspi_cs_control - chip select control for the coldfire qspi driver
  13  * @setup: setup the control; allocate gpio's, etc. May be NULL.
  14  * @teardown: finish with the control; free gpio's, etc. May be NULL.
  15  * @select: output the signals to select the device.  Can not be NULL.
  16  * @deselect: output the signals to deselect the device. Can not be NULL.
  17  *
  18  * The QSPI module has 4 hardware chip selects.  We don't use them.  Instead
  19  * platforms are required to supply a mcfqspi_cs_control as a part of the
  20  * platform data for each QSPI master controller.  Only the select and
  21  * deselect functions are required.
  22 */
  23 struct mcfqspi_cs_control {
  24         int     (*setup)(struct mcfqspi_cs_control *);
  25         void    (*teardown)(struct mcfqspi_cs_control *);
  26         void    (*select)(struct mcfqspi_cs_control *, u8, bool);
  27         void    (*deselect)(struct mcfqspi_cs_control *, u8, bool);
  28 };
  29
  30 /**
  31  * struct mcfqspi_platform_data - platform data for the coldfire qspi driver
  32  * @bus_num: board specific identifier for this qspi driver.
  33  * @num_chipselects: number of chip selects supported by this qspi driver.
  34  * @cs_control: platform dependent chip select control.
  35 */
  36 struct mcfqspi_platform_data {
  37         s16     bus_num;
  38         u16     num_chipselect;
  39         struct mcfqspi_cs_control *cs_control;
  40 };
  41
  42 #endif /* mcfqspi_h */