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