Commit b9d33fa0 authored by Simon Glass's avatar Simon Glass
Browse files

sandbox: Add a warm and cold reset driver



Add drivers for sandbox. One can only perform a warm reset (which does
nothing). The other can perform a cold reset or a power reset (the
latter will quit U-Boot). These can be used for testing the reset uclass.
Signed-off-by: default avatarSimon Glass <sjg@chromium.org>
parent 1704d083
......@@ -22,6 +22,7 @@ obj-$(CONFIG_MXC_OCOTP) += mxc_ocotp.o
obj-$(CONFIG_MXS_OCOTP) += mxs_ocotp.o
obj-$(CONFIG_NS87308) += ns87308.o
obj-$(CONFIG_PDSP188x) += pdsp188x.o
obj-$(CONFIG_SANDBOX) += reset_sandbox.o
ifdef CONFIG_DM_I2C
obj-$(CONFIG_SANDBOX) += i2c_eeprom_emul.o
endif
......
/*
* 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 <reset.h>
#include <asm/state.h>
#include <asm/test.h>
DECLARE_GLOBAL_DATA_PTR;
static int sandbox_warm_reset_request(struct udevice *dev, enum reset_t type)
{
struct sandbox_state *state = state_get_current();
switch (type) {
case RESET_WARM:
state->last_reset = type;
break;
default:
return -ENOSYS;
}
if (!state->reset_allowed[type])
return -EACCES;
return -EINPROGRESS;
}
static int sandbox_reset_request(struct udevice *dev, enum reset_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 (gd->fdt_blob && dev->of_offset == -1)
return -ENODEV;
switch (type) {
case RESET_COLD:
state->last_reset = type;
break;
case RESET_POWER:
state->last_reset = type;
if (!state->reset_allowed[type])
return -EACCES;
/* TODO: sandbox_exit(); */
break;
default:
return -ENOSYS;
}
if (!state->reset_allowed[type])
return -EACCES;
return -EINPROGRESS;
}
static struct reset_ops sandbox_reset_ops = {
.request = sandbox_reset_request,
};
static const struct udevice_id sandbox_reset_ids[] = {
{ .compatible = "sandbox,reset" },
{ }
};
U_BOOT_DRIVER(reset_sandbox) = {
.name = "reset_sandbox",
.id = UCLASS_RESET,
.of_match = sandbox_reset_ids,
.ops = &sandbox_reset_ops,
};
static struct reset_ops sandbox_warm_reset_ops = {
.request = sandbox_warm_reset_request,
};
static const struct udevice_id sandbox_warm_reset_ids[] = {
{ .compatible = "sandbox,warm-reset" },
{ }
};
U_BOOT_DRIVER(warm_reset_sandbox) = {
.name = "warm_reset_sandbox",
.id = UCLASS_RESET,
.of_match = sandbox_warm_reset_ids,
.ops = &sandbox_warm_reset_ops,
};
/* This is here in case we don't have a device tree */
U_BOOT_DEVICE(reset_sandbox_non_fdt) = {
.name = "reset_sandbox",
};
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