da2348b161
Optimize the reset driver to prevent the use of the timer function before the timer driver initialization is completed, which resloves the following warning messages: sbi_timer_delay_loop: called without timer device Signed-off-by: haijiao.liu <haijiao.liu@sophgo.com>
94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
/*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2023 Lin Chunzhi <chunzhi.lin@sophgo.com>
|
|
*/
|
|
|
|
#include <libfdt.h>
|
|
#include <sbi/sbi_hart.h>
|
|
#include <sbi/sbi_types.h>
|
|
#include <sbi/sbi_error.h>
|
|
#include <sbi/sbi_system.h>
|
|
#include <sbi/sbi_console.h>
|
|
#include <sbi_utils/fdt/fdt_helper.h>
|
|
#include <sbi_utils/reset/fdt_reset.h>
|
|
#include <sbi_utils/i2c/fdt_i2c.h>
|
|
|
|
#define REG_CMD 0x03
|
|
|
|
#define CMD_POWEROFF 0x02
|
|
#define CMD_RESET 0x03
|
|
#define CMD_REBOOT 0x07
|
|
|
|
static struct i2c_adapter *mcu_adapter = NULL;
|
|
static uint32_t mcu_reg = 0;
|
|
|
|
static int sg2042_mcu_reset_check(u32 type, u32 reason)
|
|
{
|
|
switch (type) {
|
|
case SBI_SRST_RESET_TYPE_SHUTDOWN:
|
|
return 1;
|
|
case SBI_SRST_RESET_TYPE_COLD_REBOOT:
|
|
case SBI_SRST_RESET_TYPE_WARM_REBOOT:
|
|
return 255;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sg2042_mcu_reset(u32 type, u32 reason)
|
|
{
|
|
switch (type) {
|
|
case SBI_SRST_RESET_TYPE_SHUTDOWN:
|
|
i2c_adapter_reg_write(mcu_adapter, mcu_reg,
|
|
REG_CMD, CMD_POWEROFF);
|
|
break;
|
|
case SBI_SRST_RESET_TYPE_COLD_REBOOT:
|
|
case SBI_SRST_RESET_TYPE_WARM_REBOOT:
|
|
i2c_adapter_reg_write(mcu_adapter, mcu_reg,
|
|
REG_CMD, CMD_REBOOT);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static struct sbi_system_reset_device sg2042_mcu_reset_device = {
|
|
.name = "sg2042-mcu-reset",
|
|
.system_reset_check = sg2042_mcu_reset_check,
|
|
.system_reset = sg2042_mcu_reset
|
|
};
|
|
|
|
static int sg2042_mcu_reset_init(const void *fdt, int nodeoff,
|
|
const struct fdt_match *match)
|
|
{
|
|
int ret, i2c_bus;
|
|
uint64_t addr;
|
|
|
|
ret = fdt_get_node_addr_size(fdt, nodeoff, 0, &addr, NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mcu_reg = addr;
|
|
|
|
i2c_bus = fdt_parent_offset(fdt, nodeoff);
|
|
if (i2c_bus < 0)
|
|
return i2c_bus;
|
|
|
|
ret = fdt_i2c_adapter_get(fdt, i2c_bus, &mcu_adapter);
|
|
if (ret)
|
|
return ret;
|
|
|
|
sbi_system_reset_add_device(&sg2042_mcu_reset_device);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct fdt_match sg2042_mcu_reset_match[] = {
|
|
{ .compatible = "sophgo,sg2042-hwmon-mcu", .data = (void *)true},
|
|
{ },
|
|
};
|
|
|
|
const struct fdt_driver fdt_reset_sg2042_mcu = {
|
|
.match_table = sg2042_mcu_reset_match,
|
|
.init = sg2042_mcu_reset_init,
|
|
};
|