mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 10:48:51 +00:00
cd93d625fd
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2018 MediaTek Inc.
|
|
*
|
|
* Author: Ryder Lee <ryder.lee@mediatek.com>
|
|
* Weijie Gao <weijie.gao@mediatek.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <log.h>
|
|
#include <malloc.h>
|
|
#include <dm/lists.h>
|
|
#include <regmap.h>
|
|
#include <reset-uclass.h>
|
|
#include <syscon.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/err.h>
|
|
|
|
struct mediatek_reset_priv {
|
|
struct regmap *regmap;
|
|
u32 regofs;
|
|
u32 nr_resets;
|
|
};
|
|
|
|
static int mediatek_reset_request(struct reset_ctl *reset_ctl)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int mediatek_reset_free(struct reset_ctl *reset_ctl)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int mediatek_reset_assert(struct reset_ctl *reset_ctl)
|
|
{
|
|
struct mediatek_reset_priv *priv = dev_get_priv(reset_ctl->dev);
|
|
int id = reset_ctl->id;
|
|
|
|
if (id >= priv->nr_resets)
|
|
return -EINVAL;
|
|
|
|
return regmap_update_bits(priv->regmap,
|
|
priv->regofs + ((id / 32) << 2), BIT(id % 32), BIT(id % 32));
|
|
}
|
|
|
|
static int mediatek_reset_deassert(struct reset_ctl *reset_ctl)
|
|
{
|
|
struct mediatek_reset_priv *priv = dev_get_priv(reset_ctl->dev);
|
|
int id = reset_ctl->id;
|
|
|
|
if (id >= priv->nr_resets)
|
|
return -EINVAL;
|
|
|
|
return regmap_update_bits(priv->regmap,
|
|
priv->regofs + ((id / 32) << 2), BIT(id % 32), 0);
|
|
}
|
|
|
|
struct reset_ops mediatek_reset_ops = {
|
|
.request = mediatek_reset_request,
|
|
.rfree = mediatek_reset_free,
|
|
.rst_assert = mediatek_reset_assert,
|
|
.rst_deassert = mediatek_reset_deassert,
|
|
};
|
|
|
|
static int mediatek_reset_probe(struct udevice *dev)
|
|
{
|
|
struct mediatek_reset_priv *priv = dev_get_priv(dev);
|
|
|
|
if (!priv->regofs && !priv->nr_resets)
|
|
return -EINVAL;
|
|
|
|
priv->regmap = syscon_node_to_regmap(dev_ofnode(dev));
|
|
if (IS_ERR(priv->regmap))
|
|
return PTR_ERR(priv->regmap);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mediatek_reset_bind(struct udevice *pdev, u32 regofs, u32 num_regs)
|
|
{
|
|
struct udevice *rst_dev;
|
|
struct mediatek_reset_priv *priv;
|
|
int ret;
|
|
|
|
ret = device_bind_driver_to_node(pdev, "mediatek_reset", "reset",
|
|
dev_ofnode(pdev), &rst_dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
priv = malloc(sizeof(struct mediatek_reset_priv));
|
|
priv->regofs = regofs;
|
|
priv->nr_resets = num_regs * 32;
|
|
rst_dev->priv = priv;
|
|
|
|
return 0;
|
|
}
|
|
|
|
U_BOOT_DRIVER(mediatek_reset) = {
|
|
.name = "mediatek_reset",
|
|
.id = UCLASS_RESET,
|
|
.probe = mediatek_reset_probe,
|
|
.ops = &mediatek_reset_ops,
|
|
.priv_auto_alloc_size = sizeof(struct mediatek_reset_priv),
|
|
};
|