mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright 2017 Google, Inc
|
|
* Copyright 2020 ASPEED Technology Inc.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <log.h>
|
|
#include <misc.h>
|
|
#include <reset.h>
|
|
#include <reset-uclass.h>
|
|
#include <linux/err.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/scu_ast2500.h>
|
|
|
|
struct ast2500_reset_priv {
|
|
struct ast2500_scu *scu;
|
|
};
|
|
|
|
static int ast2500_reset_request(struct reset_ctl *reset_ctl)
|
|
{
|
|
debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
|
|
reset_ctl->dev, reset_ctl->id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ast2500_reset_free(struct reset_ctl *reset_ctl)
|
|
{
|
|
debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
|
|
reset_ctl->dev, reset_ctl->id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ast2500_reset_assert(struct reset_ctl *reset_ctl)
|
|
{
|
|
struct ast2500_reset_priv *priv = dev_get_priv(reset_ctl->dev);
|
|
struct ast2500_scu *scu = priv->scu;
|
|
|
|
debug("%s: reset_ctl->id: %lu\n", __func__, reset_ctl->id);
|
|
|
|
if (reset_ctl->id < 32)
|
|
setbits_le32(&scu->sysreset_ctrl1, BIT(reset_ctl->id));
|
|
else
|
|
setbits_le32(&scu->sysreset_ctrl2, BIT(reset_ctl->id - 32));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ast2500_reset_deassert(struct reset_ctl *reset_ctl)
|
|
{
|
|
struct ast2500_reset_priv *priv = dev_get_priv(reset_ctl->dev);
|
|
struct ast2500_scu *scu = priv->scu;
|
|
|
|
debug("%s: reset_ctl->id: %lu\n", __func__, reset_ctl->id);
|
|
|
|
if (reset_ctl->id < 32)
|
|
clrbits_le32(&scu->sysreset_ctrl1, BIT(reset_ctl->id));
|
|
else
|
|
clrbits_le32(&scu->sysreset_ctrl2, BIT(reset_ctl->id - 32));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ast2500_reset_probe(struct udevice *dev)
|
|
{
|
|
int rc;
|
|
struct ast2500_reset_priv *priv = dev_get_priv(dev);
|
|
struct udevice *scu_dev;
|
|
|
|
/* get SCU base from clock device */
|
|
rc = uclass_get_device_by_driver(UCLASS_CLK,
|
|
DM_GET_DRIVER(aspeed_ast2500_scu), &scu_dev);
|
|
if (rc) {
|
|
debug("%s: clock device not found, rc=%d\n", __func__, rc);
|
|
return rc;
|
|
}
|
|
|
|
priv->scu = devfdt_get_addr_ptr(scu_dev);
|
|
if (IS_ERR_OR_NULL(priv->scu)) {
|
|
debug("%s: invalid SCU base pointer\n", __func__);
|
|
return PTR_ERR(priv->scu);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id ast2500_reset_ids[] = {
|
|
{ .compatible = "aspeed,ast2500-reset" },
|
|
{ }
|
|
};
|
|
|
|
struct reset_ops ast2500_reset_ops = {
|
|
.request = ast2500_reset_request,
|
|
.rfree = ast2500_reset_free,
|
|
.rst_assert = ast2500_reset_assert,
|
|
.rst_deassert = ast2500_reset_deassert,
|
|
};
|
|
|
|
U_BOOT_DRIVER(ast2500_reset) = {
|
|
.name = "ast2500_reset",
|
|
.id = UCLASS_RESET,
|
|
.of_match = ast2500_reset_ids,
|
|
.probe = ast2500_reset_probe,
|
|
.ops = &ast2500_reset_ops,
|
|
.priv_auto = sizeof(struct ast2500_reset_priv),
|
|
};
|