| /* |
| * 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) |
