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/* Copyright 2021 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <drivers/cros_bbram.h>
#include <logging/log.h>
#include "system.h"
#define GET_BBRAM_OFFSET(node) \
DT_PROP(DT_PATH(named_bbram_regions, node), offset)
#define GET_BBRAM_SIZE(node) DT_PROP(DT_PATH(named_bbram_regions, node), size)
LOG_MODULE_REGISTER(shim_ite_system, LOG_LEVEL_ERR);
const struct device *bbram_dev;
void chip_save_reset_flags(uint32_t flags)
{
if (bbram_dev == NULL) {
LOG_ERR("bbram_dev doesn't have a binding");
return;
}
cros_bbram_write(bbram_dev, GET_BBRAM_OFFSET(saved_reset_flags),
GET_BBRAM_SIZE(saved_reset_flags), (uint8_t *)&flags);
}
uint32_t chip_read_reset_flags(void)
{
uint32_t flags = 0;
if (bbram_dev == NULL) {
LOG_ERR("bbram_dev doesn't have a binding");
return 0;
}
cros_bbram_read(bbram_dev, GET_BBRAM_OFFSET(saved_reset_flags),
GET_BBRAM_SIZE(saved_reset_flags), (uint8_t *)&flags);
return flags;
}
int system_set_scratchpad(uint32_t value)
{
if (bbram_dev == NULL) {
LOG_ERR("bbram_dev doesn't have a binding");
return 0;
}
cros_bbram_write(bbram_dev, GET_BBRAM_OFFSET(scratchpad),
GET_BBRAM_SIZE(scratchpad), (uint8_t *)&value);
return EC_SUCCESS;
}
uint32_t system_get_scratchpad(void)
{
uint32_t value = 0;
if (bbram_dev == NULL) {
LOG_ERR("bbram_dev doesn't have a binding");
return 0;
}
cros_bbram_read(bbram_dev, GET_BBRAM_OFFSET(scratchpad),
GET_BBRAM_SIZE(scratchpad), (uint8_t *)&value);
return value;
}
static int chip_system_init(const struct device *unused)
{
ARG_UNUSED(unused);
bbram_dev = device_get_binding(DT_LABEL(DT_NODELABEL(bbram)));
if (!bbram_dev) {
LOG_ERR("bbram_dev get binding failed");
return -1;
}
return 0;
}
SYS_INIT(chip_system_init, PRE_KERNEL_1, 15);
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