56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
/*
|
|
* (C) Copyright 2016 Google, Inc
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <sysreset.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/wdt.h>
|
|
#include <linux/err.h>
|
|
|
|
/* Number of Watchdog Timer ticks before reset */
|
|
#define AST_WDT_RESET_TIMEOUT 10
|
|
#define AST_WDT_FOR_RESET 0
|
|
|
|
static int ast_sysreset_request(struct udevice *dev, enum sysreset_t type)
|
|
{
|
|
struct ast_wdt *wdt = ast_get_wdt(AST_WDT_FOR_RESET);
|
|
u32 reset_mode = 0;
|
|
|
|
if (IS_ERR(wdt))
|
|
return PTR_ERR(wdt);
|
|
|
|
switch (type) {
|
|
case SYSRESET_WARM:
|
|
reset_mode = WDT_CTRL_RESET_CPU;
|
|
break;
|
|
case SYSRESET_COLD:
|
|
reset_mode = WDT_CTRL_RESET_CHIP;
|
|
break;
|
|
default:
|
|
return -EPROTONOSUPPORT;
|
|
}
|
|
|
|
/* Clear reset mode bits */
|
|
clrsetbits_le32(&wdt->ctrl,
|
|
(WDT_CTRL_RESET_MODE_MASK << WDT_CTRL_RESET_MODE_SHIFT),
|
|
(reset_mode << WDT_CTRL_RESET_MODE_SHIFT));
|
|
wdt_start(wdt, AST_WDT_RESET_TIMEOUT);
|
|
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
static struct sysreset_ops ast_sysreset = {
|
|
.request = ast_sysreset_request,
|
|
};
|
|
|
|
U_BOOT_DRIVER(sysreset_ast) = {
|
|
.name = "ast_sysreset",
|
|
.id = UCLASS_SYSRESET,
|
|
.ops = &ast_sysreset,
|
|
};
|