mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 17:08:52 +09:00
![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright 2017 Google, Inc
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <misc.h>
|
|
#include <reset.h>
|
|
#include <reset-uclass.h>
|
|
#include <wdt.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/scu_ast2500.h>
|
|
#include <asm/arch/wdt.h>
|
|
|
|
struct ast2500_reset_priv {
|
|
/* WDT used to perform resets. */
|
|
struct udevice *wdt;
|
|
struct ast2500_scu *scu;
|
|
};
|
|
|
|
static int ast2500_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct ast2500_reset_priv *priv = dev_get_priv(dev);
|
|
int ret;
|
|
|
|
ret = uclass_get_device_by_phandle(UCLASS_WDT, dev, "aspeed,wdt",
|
|
&priv->wdt);
|
|
if (ret) {
|
|
debug("%s: can't find WDT for reset controller", __func__);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ast2500_reset_assert(struct reset_ctl *reset_ctl)
|
|
{
|
|
struct ast2500_reset_priv *priv = dev_get_priv(reset_ctl->dev);
|
|
u32 reset_mode, reset_mask;
|
|
bool reset_sdram;
|
|
int ret;
|
|
|
|
/*
|
|
* To reset SDRAM, a specifal flag in SYSRESET register
|
|
* needs to be enabled first
|
|
*/
|
|
reset_mode = ast_reset_mode_from_flags(reset_ctl->id);
|
|
reset_mask = ast_reset_mask_from_flags(reset_ctl->id);
|
|
reset_sdram = reset_mode == WDT_CTRL_RESET_SOC &&
|
|
(reset_mask & WDT_RESET_SDRAM);
|
|
|
|
if (reset_sdram) {
|
|
ast_scu_unlock(priv->scu);
|
|
setbits_le32(&priv->scu->sysreset_ctrl1,
|
|
SCU_SYSRESET_SDRAM_WDT);
|
|
ret = wdt_expire_now(priv->wdt, reset_ctl->id);
|
|
clrbits_le32(&priv->scu->sysreset_ctrl1,
|
|
SCU_SYSRESET_SDRAM_WDT);
|
|
ast_scu_lock(priv->scu);
|
|
} else {
|
|
ret = wdt_expire_now(priv->wdt, reset_ctl->id);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
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_probe(struct udevice *dev)
|
|
{
|
|
struct ast2500_reset_priv *priv = dev_get_priv(dev);
|
|
|
|
priv->scu = ast_get_scu();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id ast2500_reset_ids[] = {
|
|
{ .compatible = "aspeed,ast2500-reset" },
|
|
{ }
|
|
};
|
|
|
|
struct reset_ops ast2500_reset_ops = {
|
|
.rst_assert = ast2500_reset_assert,
|
|
.request = ast2500_reset_request,
|
|
};
|
|
|
|
U_BOOT_DRIVER(ast2500_reset) = {
|
|
.name = "ast2500_reset",
|
|
.id = UCLASS_RESET,
|
|
.of_match = ast2500_reset_ids,
|
|
.probe = ast2500_reset_probe,
|
|
.ops = &ast2500_reset_ops,
|
|
.ofdata_to_platdata = ast2500_ofdata_to_platdata,
|
|
.priv_auto_alloc_size = sizeof(struct ast2500_reset_priv),
|
|
};
|