81c22ad0cc
Copy reusable parts from the sunxi driver, to add a driver for simple reset controllers with reset lines that can be controlled by toggling bits in exclusive, contiguous register ranges using read-modify-write cycles under a spinlock. The following patches will replace compatible reset drivers with reset-simple, extending it where necessary. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Alexandru Gagniuc <alex.g@adaptrum.com> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/*
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* Simple Reset Controller ops
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*
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* Based on Allwinner SoCs Reset Controller driver
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*
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* Copyright 2013 Maxime Ripard
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*
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* Maxime Ripard <maxime.ripard@free-electrons.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __RESET_SIMPLE_H__
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#define __RESET_SIMPLE_H__
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#include <linux/io.h>
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#include <linux/reset-controller.h>
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#include <linux/spinlock.h>
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/**
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* struct reset_simple_data - driver data for simple reset controllers
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* @lock: spinlock to protect registers during read-modify-write cycles
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* @membase: memory mapped I/O register range
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* @rcdev: reset controller device base structure
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* @active_low: if true, bits are cleared to assert the reset. Otherwise, bits
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* are set to assert the reset. Note that this says nothing about
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* the voltage level of the actual reset line.
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*/
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struct reset_simple_data {
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spinlock_t lock;
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void __iomem *membase;
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struct reset_controller_dev rcdev;
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bool active_low;
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};
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extern const struct reset_control_ops reset_simple_ops;
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#endif /* __RESET_SIMPLE_H__ */
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