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// SPDX-License-Identifier: GPL-2.0+
#include <linux/errno.h>
#include <linux/kernel.h>
#include <adc.h>
#include <env.h>
#define HW_ID_CHANNEL 1
struct board_model {
unsigned int low;
unsigned int high;
const char *fdtfile;
};
static const struct board_model board_models[] = {
{ 230, 270, "rockchip/rk3566-radxa-zero-3w.dtb" },
{ 400, 450, "rockchip/rk3566-radxa-zero-3e.dtb" },
};
static const struct board_model *get_board_model(void)
{
unsigned int val;
int i, ret;
ret = adc_channel_single_shot("saradc@fe720000", HW_ID_CHANNEL, &val);
if (ret)
return NULL;
for (i = 0; i < ARRAY_SIZE(board_models); i++) {
unsigned int min = board_models[i].low;
unsigned int max = board_models[i].high;
if (min <= val && val <= max)
return &board_models[i];
}
return NULL;
}
int rk_board_late_init(void)
{
const struct board_model *model = get_board_model();
if (model)
env_set("fdtfile", model->fdtfile);
return 0;
}
int board_fit_config_name_match(const char *name)
{
const struct board_model *model = get_board_model();
if (model && !strcmp(name, model->fdtfile))
return 0;
return -EINVAL;
}
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