c793764549
Timer configuration function added Signed-off-by: Andy Sinclair <andy.sinclair@nordicsemi.no>
129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
/*
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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_npm1300
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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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#include <zephyr/sys/byteorder.h>
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#include <zephyr/drivers/mfd/npm1300.h>
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#define TIME_BASE 0x07U
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#define TIME_OFFSET_LOAD 0x03U
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#define TIME_OFFSET_TIMER 0x08U
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#define TIMER_PRESCALER_MS 16U
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#define TIMER_MAX 0xFFFFFFU
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struct mfd_npm1300_config {
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struct i2c_dt_spec i2c;
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};
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struct mfd_npm1300_data {
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struct k_mutex mutex;
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};
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static int mfd_npm1300_init(const struct device *dev)
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{
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const struct mfd_npm1300_config *config = dev->config;
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struct mfd_npm1300_data *mfd_data = dev->data;
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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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k_mutex_init(&mfd_data->mutex);
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return 0;
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}
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int mfd_npm1300_reg_read_burst(const struct device *dev, uint8_t base, uint8_t offset, void *data,
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size_t len)
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{
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const struct mfd_npm1300_config *config = dev->config;
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uint8_t buff[] = {base, offset};
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return i2c_write_read_dt(&config->i2c, buff, sizeof(buff), data, len);
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}
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int mfd_npm1300_reg_read(const struct device *dev, uint8_t base, uint8_t offset, uint8_t *data)
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{
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return mfd_npm1300_reg_read_burst(dev, base, offset, data, 1U);
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}
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int mfd_npm1300_reg_write(const struct device *dev, uint8_t base, uint8_t offset, uint8_t data)
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{
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const struct mfd_npm1300_config *config = dev->config;
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uint8_t buff[] = {base, offset, data};
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return i2c_write_dt(&config->i2c, buff, sizeof(buff));
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}
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int mfd_npm1300_reg_write2(const struct device *dev, uint8_t base, uint8_t offset, uint8_t data1,
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uint8_t data2)
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{
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const struct mfd_npm1300_config *config = dev->config;
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uint8_t buff[] = {base, offset, data1, data2};
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return i2c_write_dt(&config->i2c, buff, sizeof(buff));
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}
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int mfd_npm1300_reg_update(const struct device *dev, uint8_t base, uint8_t offset, uint8_t data,
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uint8_t mask)
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{
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struct mfd_npm1300_data *mfd_data = dev->data;
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uint8_t reg;
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int ret;
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k_mutex_lock(&mfd_data->mutex, K_FOREVER);
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ret = mfd_npm1300_reg_read(dev, base, offset, ®);
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if (ret == 0) {
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reg = (reg & ~mask) | (data & mask);
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ret = mfd_npm1300_reg_write(dev, base, offset, reg);
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}
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k_mutex_unlock(&mfd_data->mutex);
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return ret;
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}
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int mfd_npm1300_set_timer(const struct device *dev, uint32_t time_ms)
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{
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const struct mfd_npm1300_config *config = dev->config;
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uint8_t buff[5] = {TIME_BASE, TIME_OFFSET_TIMER};
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uint32_t ticks = time_ms / TIMER_PRESCALER_MS;
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if (ticks > TIMER_MAX) {
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return -EINVAL;
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}
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sys_put_be24(ticks, &buff[2]);
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int ret = i2c_write_dt(&config->i2c, buff, sizeof(buff));
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if (ret != 0) {
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return ret;
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}
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return mfd_npm1300_reg_write(dev, TIME_BASE, TIME_OFFSET_LOAD, 1U);
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}
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#define MFD_NPM1300_DEFINE(inst) \
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static struct mfd_npm1300_data data_##inst; \
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\
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static const struct mfd_npm1300_config config##inst = { \
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.i2c = I2C_DT_SPEC_INST_GET(inst), \
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}; \
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\
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DEVICE_DT_INST_DEFINE(inst, mfd_npm1300_init, NULL, &data_##inst, &config##inst, \
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POST_KERNEL, CONFIG_MFD_INIT_PRIORITY, NULL);
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DT_INST_FOREACH_STATUS_OKAY(MFD_NPM1300_DEFINE)
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