mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-17 15:38:51 +09:00
![Stephen Warren](/assets/img/avatar_default.png)
The current reset API implements a method to reset the entire system. In the near future, I'd like to introduce code that implements the device tree reset bindings; i.e. the equivalent of the Linux kernel's reset API. This controls resets to individual HW blocks or external chips with reset signals. It doesn't make sense to merge the two APIs into one since they have different semantic purposes. Resolve the naming conflict by renaming the existing reset API to sysreset instead, so the new reset API can be called just reset. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
102 lines
2.2 KiB
C
102 lines
2.2 KiB
C
/*
|
|
* Copyright (c) 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <sysreset.h>
|
|
#include <asm/state.h>
|
|
#include <asm/test.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static int sandbox_warm_sysreset_request(struct udevice *dev,
|
|
enum sysreset_t type)
|
|
{
|
|
struct sandbox_state *state = state_get_current();
|
|
|
|
switch (type) {
|
|
case SYSRESET_WARM:
|
|
state->last_sysreset = type;
|
|
break;
|
|
default:
|
|
return -ENOSYS;
|
|
}
|
|
if (!state->sysreset_allowed[type])
|
|
return -EACCES;
|
|
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
static int sandbox_sysreset_request(struct udevice *dev, enum sysreset_t type)
|
|
{
|
|
struct sandbox_state *state = state_get_current();
|
|
|
|
/*
|
|
* If we have a device tree, the device we created from platform data
|
|
* (see the U_BOOT_DEVICE() declaration below) should not do anything.
|
|
* If we are that device, return an error.
|
|
*/
|
|
if (state->fdt_fname && dev->of_offset == -1)
|
|
return -ENODEV;
|
|
|
|
switch (type) {
|
|
case SYSRESET_COLD:
|
|
state->last_sysreset = type;
|
|
break;
|
|
case SYSRESET_POWER:
|
|
state->last_sysreset = type;
|
|
if (!state->sysreset_allowed[type])
|
|
return -EACCES;
|
|
sandbox_exit();
|
|
break;
|
|
default:
|
|
return -ENOSYS;
|
|
}
|
|
if (!state->sysreset_allowed[type])
|
|
return -EACCES;
|
|
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
static struct sysreset_ops sandbox_sysreset_ops = {
|
|
.request = sandbox_sysreset_request,
|
|
};
|
|
|
|
static const struct udevice_id sandbox_sysreset_ids[] = {
|
|
{ .compatible = "sandbox,reset" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(sysreset_sandbox) = {
|
|
.name = "sysreset_sandbox",
|
|
.id = UCLASS_SYSRESET,
|
|
.of_match = sandbox_sysreset_ids,
|
|
.ops = &sandbox_sysreset_ops,
|
|
};
|
|
|
|
static struct sysreset_ops sandbox_warm_sysreset_ops = {
|
|
.request = sandbox_warm_sysreset_request,
|
|
};
|
|
|
|
static const struct udevice_id sandbox_warm_sysreset_ids[] = {
|
|
{ .compatible = "sandbox,warm-reset" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(warm_sysreset_sandbox) = {
|
|
.name = "warm_sysreset_sandbox",
|
|
.id = UCLASS_SYSRESET,
|
|
.of_match = sandbox_warm_sysreset_ids,
|
|
.ops = &sandbox_warm_sysreset_ops,
|
|
};
|
|
|
|
/* This is here in case we don't have a device tree */
|
|
U_BOOT_DEVICE(sysreset_sandbox_non_fdt) = {
|
|
.name = "sysreset_sandbox",
|
|
};
|