blob: 7ea6a9f198cfdac7badd839a6a2aed728ff1ba9b [file] [log] [blame]
/*
* Copyright (c) 2023 Grinn
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT maxim_max20335
#include <errno.h>
#include <zephyr/drivers/i2c.h>
#include <zephyr/sys/util.h>
#define MAX20335_REG_CHIP_ID 0x00
#define MAX20335_CHIP_ID_VAL 0x04
struct mfd_max20335_config {
struct i2c_dt_spec bus;
};
static int mfd_max20335_init(const struct device *dev)
{
const struct mfd_max20335_config *config = dev->config;
uint8_t val;
int ret;
if (!i2c_is_ready_dt(&config->bus)) {
return -ENODEV;
}
ret = i2c_reg_read_byte_dt(&config->bus, MAX20335_REG_CHIP_ID, &val);
if (ret < 0) {
return ret;
}
if (val != MAX20335_CHIP_ID_VAL) {
return -ENODEV;
}
return 0;
}
#define MFD_MA20335_DEFINE(inst) \
static const struct mfd_max20335_config mfd_max20335_config##inst = { \
.bus = I2C_DT_SPEC_INST_GET(inst), \
}; \
\
DEVICE_DT_INST_DEFINE(inst, mfd_max20335_init, NULL, NULL, \
&mfd_max20335_config##inst, POST_KERNEL, \
CONFIG_MFD_INIT_PRIORITY, NULL);
DT_INST_FOREACH_STATUS_OKAY(MFD_MA20335_DEFINE)