1 /* 2 * Simple Reset Controller ops 3 * 4 * Based on Allwinner SoCs Reset Controller driver 5 * 6 * Copyright 2013 Maxime Ripard 7 * 8 * Maxime Ripard <maxime.ripard@free-electrons.com> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 */ 15 16 #ifndef __RESET_SIMPLE_H__ 17 #define __RESET_SIMPLE_H__ 18 19 #include <linux/io.h> 20 #include <linux/reset-controller.h> 21 #include <linux/spinlock.h> 22 23 /** 24 * struct reset_simple_data - driver data for simple reset controllers 25 * @lock: spinlock to protect registers during read-modify-write cycles 26 * @membase: memory mapped I/O register range 27 * @rcdev: reset controller device base structure 28 * @active_low: if true, bits are cleared to assert the reset. Otherwise, bits 29 * are set to assert the reset. Note that this says nothing about 30 * the voltage level of the actual reset line. 31 * @status_active_low: if true, bits read back as cleared while the reset is 32 * asserted. Otherwise, bits read back as set while the 33 * reset is asserted. 34 */ 35 struct reset_simple_data { 36 spinlock_t lock; 37 void __iomem *membase; 38 struct reset_controller_dev rcdev; 39 bool active_low; 40 bool status_active_low; 41 }; 42 43 extern const struct reset_control_ops reset_simple_ops; 44 45 #endif /* __RESET_SIMPLE_H__ */ 46