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// SPDX-License-Identifier: GPL-2.0-only
#include <common.h>
#include <driver.h>
#include <poweroff.h>
#include <restart.h>
#include <mach/linux.h>
#include <asm/reset_source.h>
#include <linux/nvmem-consumer.h>
struct sandbox_power {
struct restart_handler rst_hang, rst_reexec;
struct poweroff_handler poweroff;
struct nvmem_cell *reset_source_cell;
};
static void sandbox_poweroff(struct poweroff_handler *poweroff)
{
struct sandbox_power *power = container_of(poweroff, struct sandbox_power, poweroff);
sandbox_save_reset_source(power->reset_source_cell, RESET_POR);
linux_exit();
}
static void sandbox_rst_hang(struct restart_handler *rst)
{
linux_hang();
}
static void sandbox_rst_reexec(struct restart_handler *rst)
{
struct sandbox_power *power = container_of(rst, struct sandbox_power, rst_reexec);
sandbox_save_reset_source(power->reset_source_cell, RESET_RST);
linux_reexec();
}
static int sandbox_power_probe(struct device *dev)
{
struct sandbox_power *power = xzalloc(sizeof(*power));
size_t len;
u8 *rst;
power->poweroff = (struct poweroff_handler) {
.name = "exit",
.poweroff = sandbox_poweroff
};
poweroff_handler_register(&power->poweroff);
power->rst_hang = (struct restart_handler) {
.name = "hang",
.restart = sandbox_rst_hang
};
power->rst_reexec = (struct restart_handler) {
.name = "reexec", .priority = 200,
.restart = sandbox_rst_reexec,
};
restart_handler_register(&power->rst_hang);
if (IS_ENABLED(CONFIG_SANDBOX_REEXEC))
restart_handler_register(&power->rst_reexec);
power->reset_source_cell = of_nvmem_cell_get(dev->of_node,
"reset-source");
if (IS_ERR(power->reset_source_cell)) {
if (PTR_ERR(power->reset_source_cell) != -EPROBE_DEFER)
dev_warn(dev, "No reset source info available: %pe\n",
power->reset_source_cell);
power->reset_source_cell = NULL;
return 0;
}
rst = nvmem_cell_read(power->reset_source_cell, &len);
if (!IS_ERR(rst)) {
reset_source_set_prinst(*rst, RESET_SOURCE_DEFAULT_PRIORITY, 0);
free(rst);
}
return 0;
}
static __maybe_unused struct of_device_id sandbox_power_dt_ids[] = {
{ .compatible = "barebox,sandbox-power" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sandbox_power_dt_ids);
static struct driver sandbox_power_drv = {
.name = "sandbox-power",
.of_compatible = sandbox_power_dt_ids,
.probe = sandbox_power_probe,
};
coredevice_platform_driver(sandbox_power_drv);
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