reset-mtmips.c
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2019 MediaTek Inc. All Rights Reserved.
*
* Author: Weijie Gao <weijie.gao@mediatek.com>
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <reset-uclass.h>
#include <linux/io.h>
struct mtmips_reset_priv {
void __iomem *base;
};
static int mtmips_reset_request(struct reset_ctl *reset_ctl)
{
return 0;
}
static int mtmips_reset_free(struct reset_ctl *reset_ctl)
{
return 0;
}
static int mtmips_reset_assert(struct reset_ctl *reset_ctl)
{
struct mtmips_reset_priv *priv = dev_get_priv(reset_ctl->dev);
setbits_32(priv->base, BIT(reset_ctl->id));
return 0;
}
static int mtmips_reset_deassert(struct reset_ctl *reset_ctl)
{
struct mtmips_reset_priv *priv = dev_get_priv(reset_ctl->dev);
clrbits_32(priv->base, BIT(reset_ctl->id));
return 0;
}
static const struct reset_ops mtmips_reset_ops = {
.request = mtmips_reset_request,
.rfree = mtmips_reset_free,
.rst_assert = mtmips_reset_assert,
.rst_deassert = mtmips_reset_deassert,
};
static int mtmips_reset_probe(struct udevice *dev)
{
return 0;
}
static int mtmips_reset_ofdata_to_platdata(struct udevice *dev)
{
struct mtmips_reset_priv *priv = dev_get_priv(dev);
priv->base = (void __iomem *)dev_remap_addr_index(dev, 0);
if (!priv->base)
return -EINVAL;
return 0;
}
static const struct udevice_id mtmips_reset_ids[] = {
{ .compatible = "mediatek,mtmips-reset" },
{ }
};
U_BOOT_DRIVER(mtmips_reset) = {
.name = "mtmips-reset",
.id = UCLASS_RESET,
.of_match = mtmips_reset_ids,
.ofdata_to_platdata = mtmips_reset_ofdata_to_platdata,
.probe = mtmips_reset_probe,
.priv_auto_alloc_size = sizeof(struct mtmips_reset_priv),
.ops = &mtmips_reset_ops,
};