drivers/reset/reset-simple.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Simple Reset Controller ops
   4  *
   5  * Based on Allwinner SoCs Reset Controller driver
   6  *
   7  * Copyright 2013 Maxime Ripard
   8  *
   9  * Maxime Ripard <maxime.ripard@free-electrons.com>
  10  */
  11
  12 #ifndef __RESET_SIMPLE_H__
  13 #define __RESET_SIMPLE_H__
  14
  15 #include <linux/io.h>
  16 #include <linux/reset-controller.h>
  17 #include <linux/spinlock.h>
  18
  19 /**
  20  * struct reset_simple_data - driver data for simple reset controllers
  21  * @lock: spinlock to protect registers during read-modify-write cycles
  22  * @membase: memory mapped I/O register range
  23  * @rcdev: reset controller device base structure
  24  * @active_low: if true, bits are cleared to assert the reset. Otherwise, bits
  25  *              are set to assert the reset. Note that this says nothing about
  26  *              the voltage level of the actual reset line.
  27  * @status_active_low: if true, bits read back as cleared while the reset is
  28  *                     asserted. Otherwise, bits read back as set while the
  29  *                     reset is asserted.
  30  */
  31 struct reset_simple_data {
  32         spinlock_t                      lock;
  33         void __iomem                    *membase;
  34         struct reset_controller_dev     rcdev;
  35         bool                            active_low;
  36         bool                            status_active_low;
  37 };
  38
  39 extern const struct reset_control_ops reset_simple_ops;
  40
  41 #endif /* __RESET_SIMPLE_H__ */