u-boot/arch/x86/cpu/tangier/sysreset.c
Bin Meng 4c99ccfe13 x86: tangier: Add a sysreset driver
This adds a reset driver for tangier processor.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2018-07-20 09:33:22 +08:00

48 lines
931 B
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
*
* Reset driver for tangier processor
*/
#include <common.h>
#include <dm.h>
#include <sysreset.h>
#include <asm/scu.h>
static int tangier_sysreset_request(struct udevice *dev, enum sysreset_t type)
{
int value;
switch (type) {
case SYSRESET_WARM:
value = IPCMSG_WARM_RESET;
break;
case SYSRESET_COLD:
value = IPCMSG_COLD_RESET;
break;
default:
return -ENOSYS;
}
scu_ipc_simple_command(value, 0);
return -EINPROGRESS;
}
static const struct udevice_id tangier_sysreset_ids[] = {
{ .compatible = "intel,reset-tangier" },
{ }
};
static struct sysreset_ops tangier_sysreset_ops = {
.request = tangier_sysreset_request,
};
U_BOOT_DRIVER(tangier_sysreset) = {
.name = "tangier-sysreset",
.id = UCLASS_SYSRESET,
.of_match = tangier_sysreset_ids,
.ops = &tangier_sysreset_ops,
.flags = DM_FLAG_PRE_RELOC,
};