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linux-sg2042/drivers/reset/reset-simple.h

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reset: add reset-simple to unify socfpga, stm32, sunxi, and zx2967 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>
2017-08-11 18:58:43 +08:00
/*
* Simple Reset Controller ops
*
* Based on Allwinner SoCs Reset Controller driver
*
* Copyright 2013 Maxime Ripard
*
* Maxime Ripard <maxime.ripard@free-electrons.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __RESET_SIMPLE_H__
#define __RESET_SIMPLE_H__
#include <linux/io.h>
#include <linux/reset-controller.h>
#include <linux/spinlock.h>
/**
* struct reset_simple_data - driver data for simple reset controllers
* @lock: spinlock to protect registers during read-modify-write cycles
* @membase: memory mapped I/O register range
* @rcdev: reset controller device base structure
* @active_low: if true, bits are cleared to assert the reset. Otherwise, bits
* are set to assert the reset. Note that this says nothing about
* the voltage level of the actual reset line.
reset: socfpga: use the reset-simple driver Add reset line status readback, inverted status support, and socfpga device tree quirks to the simple reset driver, and use it to replace the socfpga driver. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2017-08-11 19:02:19 +08:00
* @status_active_low: if true, bits read back as cleared while the reset is
* asserted. Otherwise, bits read back as set while the
* reset is asserted.
reset: add reset-simple to unify socfpga, stm32, sunxi, and zx2967 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>
2017-08-11 18:58:43 +08:00
*/
struct reset_simple_data {
spinlock_t lock;
void __iomem *membase;
struct reset_controller_dev rcdev;
bool active_low;
reset: socfpga: use the reset-simple driver Add reset line status readback, inverted status support, and socfpga device tree quirks to the simple reset driver, and use it to replace the socfpga driver. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2017-08-11 19:02:19 +08:00
bool status_active_low;
reset: add reset-simple to unify socfpga, stm32, sunxi, and zx2967 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>
2017-08-11 18:58:43 +08:00
};
extern const struct reset_control_ops reset_simple_ops;
#endif /* __RESET_SIMPLE_H__ */