blob: b03b10b4cba9952044f9f45a75b27ae8b69d0886 [file] [log] [blame]
/*
* Copyright (c) 2023 Nordic Semiconductor ASA
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nordic_npm6001
#include <errno.h>
#include <zephyr/drivers/i2c.h>
#include <zephyr/sys/util.h>
/* nPM6001 registers */
#define NPM6001_SWREADY 0x01U
#define NPM6001_BUCK3SELDAC 0x44U
#define NPM6001_BUCKMODEPADCONF 0x4EU
#define NPM6001_PADDRIVESTRENGTH 0x53U
/* nPM6001 BUCKMODEPADCONF fields */
#define NPM6001_BUCKMODEPADCONF_BUCKMODE0PADTYPE_CMOS BIT(0)
#define NPM6001_BUCKMODEPADCONF_BUCKMODE1PADTYPE_CMOS BIT(1)
#define NPM6001_BUCKMODEPADCONF_BUCKMODE2PADTYPE_CMOS BIT(2)
#define NPM6001_BUCKMODEPADCONF_BUCKMODE0PULLD_ENABLED BIT(4)
#define NPM6001_BUCKMODEPADCONF_BUCKMODE1PULLD_ENABLED BIT(5)
#define NPM6001_BUCKMODEPADCONF_BUCKMODE2PULLD_ENABLED BIT(6)
/* nPM6001 PADDRIVESTRENGTH fields */
#define NPM6001_PADDRIVESTRENGTH_READY_HIGH BIT(2)
#define NPM6001_PADDRIVESTRENGTH_NINT_HIGH BIT(3)
#define NPM6001_PADDRIVESTRENGTH_SDA_HIGH BIT(5)
struct mfd_npm6001_config {
struct i2c_dt_spec i2c;
uint8_t buck_pad_val;
uint8_t pad_val;
};
static int mfd_npm6001_init(const struct device *dev)
{
const struct mfd_npm6001_config *config = dev->config;
int ret;
if (!i2c_is_ready_dt(&config->i2c)) {
return -ENODEV;
}
/* always select BUCK3 DAC (does not increase power consumption) */
ret = i2c_reg_write_byte_dt(&config->i2c, NPM6001_BUCK3SELDAC, 1U);
if (ret < 0) {
return ret;
}
/* configure pad properties */
ret = i2c_reg_write_byte_dt(&config->i2c, NPM6001_BUCKMODEPADCONF, config->buck_pad_val);
if (ret < 0) {
return ret;
}
ret = i2c_reg_write_byte_dt(&config->i2c, NPM6001_PADDRIVESTRENGTH, config->pad_val);
if (ret < 0) {
return ret;
}
/* Enable switching to hysteresis mode */
ret = i2c_reg_write_byte_dt(&config->i2c, NPM6001_SWREADY, 1U);
if (ret < 0) {
return ret;
}
return 0;
}
#define MFD_NPM6001_DEFINE(inst) \
static const struct mfd_npm6001_config config##inst = { \
.i2c = I2C_DT_SPEC_INST_GET(inst), \
.buck_pad_val = ((DT_INST_ENUM_IDX(inst, nordic_buck_mode0_input_type) * \
NPM6001_BUCKMODEPADCONF_BUCKMODE0PADTYPE_CMOS) | \
(DT_INST_ENUM_IDX(inst, nordic_buck_mode1_input_type) * \
NPM6001_BUCKMODEPADCONF_BUCKMODE1PADTYPE_CMOS) | \
(DT_INST_ENUM_IDX(inst, nordic_buck_mode2_input_type) * \
NPM6001_BUCKMODEPADCONF_BUCKMODE2PADTYPE_CMOS) | \
(DT_INST_PROP(inst, nordic_buck_mode0_pull_down) * \
NPM6001_BUCKMODEPADCONF_BUCKMODE0PULLD_ENABLED) | \
(DT_INST_PROP(inst, nordic_buck_mode1_pull_down) * \
NPM6001_BUCKMODEPADCONF_BUCKMODE1PULLD_ENABLED) | \
(DT_INST_PROP(inst, nordic_buck_mode2_pull_down) * \
NPM6001_BUCKMODEPADCONF_BUCKMODE2PULLD_ENABLED)), \
.pad_val = ((DT_INST_PROP(inst, nordic_ready_high_drive) * \
NPM6001_PADDRIVESTRENGTH_READY_HIGH) | \
(DT_INST_PROP(inst, nordic_nint_high_drive) * \
NPM6001_PADDRIVESTRENGTH_NINT_HIGH) | \
(DT_INST_PROP(inst, nordic_sda_high_drive) * \
NPM6001_PADDRIVESTRENGTH_SDA_HIGH)), \
}; \
\
DEVICE_DT_INST_DEFINE(inst, mfd_npm6001_init, NULL, NULL, &config##inst, POST_KERNEL, \
CONFIG_MFD_NPM6001_INIT_PRIORITY, NULL);
DT_INST_FOREACH_STATUS_OKAY(MFD_NPM6001_DEFINE)