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1d80c14248
Start our new clock infrastructure by adding the registration code, common structure and common code. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/20160629190535.11855-3-maxime.ripard@free-electrons.com
56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/*
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* Copyright (C) 2016 Maxime Ripard
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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
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*/
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#include <linux/io.h>
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#include <linux/reset-controller.h>
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#include "ccu_reset.h"
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static int ccu_reset_assert(struct reset_controller_dev *rcdev,
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unsigned long id)
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{
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struct ccu_reset *ccu = rcdev_to_ccu_reset(rcdev);
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const struct ccu_reset_map *map = &ccu->reset_map[id];
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unsigned long flags;
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u32 reg;
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spin_lock_irqsave(ccu->lock, flags);
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reg = readl(ccu->base + map->reg);
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writel(reg & ~map->bit, ccu->base + map->reg);
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spin_unlock_irqrestore(ccu->lock, flags);
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return 0;
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}
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static int ccu_reset_deassert(struct reset_controller_dev *rcdev,
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unsigned long id)
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{
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struct ccu_reset *ccu = rcdev_to_ccu_reset(rcdev);
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const struct ccu_reset_map *map = &ccu->reset_map[id];
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unsigned long flags;
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u32 reg;
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spin_lock_irqsave(ccu->lock, flags);
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reg = readl(ccu->base + map->reg);
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writel(reg | map->bit, ccu->base + map->reg);
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spin_unlock_irqrestore(ccu->lock, flags);
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return 0;
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}
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const struct reset_control_ops ccu_reset_ops = {
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.assert = ccu_reset_assert,
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.deassert = ccu_reset_deassert,
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};
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