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