56 строки
1.3 KiB
C
56 строки
1.3 KiB
C
/*
|
|
* Copyright (C) 2016 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.
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/reset-controller.h>
|
|
|
|
#include "ccu_reset.h"
|
|
|
|
static int ccu_reset_assert(struct reset_controller_dev *rcdev,
|
|
unsigned long id)
|
|
{
|
|
struct ccu_reset *ccu = rcdev_to_ccu_reset(rcdev);
|
|
const struct ccu_reset_map *map = &ccu->reset_map[id];
|
|
unsigned long flags;
|
|
u32 reg;
|
|
|
|
spin_lock_irqsave(ccu->lock, flags);
|
|
|
|
reg = readl(ccu->base + map->reg);
|
|
writel(reg & ~map->bit, ccu->base + map->reg);
|
|
|
|
spin_unlock_irqrestore(ccu->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ccu_reset_deassert(struct reset_controller_dev *rcdev,
|
|
unsigned long id)
|
|
{
|
|
struct ccu_reset *ccu = rcdev_to_ccu_reset(rcdev);
|
|
const struct ccu_reset_map *map = &ccu->reset_map[id];
|
|
unsigned long flags;
|
|
u32 reg;
|
|
|
|
spin_lock_irqsave(ccu->lock, flags);
|
|
|
|
reg = readl(ccu->base + map->reg);
|
|
writel(reg | map->bit, ccu->base + map->reg);
|
|
|
|
spin_unlock_irqrestore(ccu->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct reset_control_ops ccu_reset_ops = {
|
|
.assert = ccu_reset_assert,
|
|
.deassert = ccu_reset_deassert,
|
|
};
|