c9f822df27
Remove the register access wrappers used to read/write the NCT38xx register space. Signed-off-by: Keith Short <keithshort@google.com>
135 lines
4.2 KiB
C
135 lines
4.2 KiB
C
/*
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* Copyright (c) 2021 Nuvoton Technology Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT nuvoton_nct38xx_gpio
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#include <zephyr/device.h>
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/drivers/gpio/gpio_nct38xx.h>
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#include <zephyr/drivers/mfd/nct38xx.h>
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#include <zephyr/kernel.h>
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#include <zephyr/sys/util_macro.h>
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#include "gpio_nct38xx.h"
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(gpio_ntc38xx, CONFIG_GPIO_LOG_LEVEL);
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/* Driver config */
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struct gpio_nct38xx_config {
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/* Multi-function device, parent to the NCT38xx GPIO controller */
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const struct device *mfd;
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/* GPIO ports */
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const struct device **sub_gpio_dev;
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uint8_t sub_gpio_port_num;
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/* Alert handler */
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const struct device *alert_dev;
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};
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/* Driver data */
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struct gpio_nct38xx_data {
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/* NCT38XX device */
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const struct device *dev;
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/* lock NCT38xx register access */
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struct k_sem *lock;
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/* I2C device for the MFD parent */
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const struct i2c_dt_spec *i2c_dev;
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};
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void nct38xx_gpio_alert_handler(const struct device *dev)
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{
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const struct gpio_nct38xx_config *const config = dev->config;
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for (int i = 0; i < config->sub_gpio_port_num; i++) {
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gpio_nct38xx_dispatch_port_isr(config->sub_gpio_dev[i]);
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}
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}
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static int nct38xx_init_interrupt(const struct device *dev)
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{
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uint16_t alert, alert_mask = 0;
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int ret = 0;
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struct gpio_nct38xx_data *data = dev->data;
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k_sem_take(data->lock, K_FOREVER);
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/* Disable all interrupt */
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if (i2c_burst_write_dt(data->i2c_dev, NCT38XX_REG_ALERT_MASK, (uint8_t *)&alert_mask,
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sizeof(alert_mask))) {
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ret = -EIO;
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goto unlock;
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}
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/* Enable vendor-defined alert for GPIO. */
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alert_mask |= BIT(NCT38XX_REG_ALERT_MASK_VENDOR_DEFINDED_ALERT);
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/* Clear alert */
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if (i2c_burst_read_dt(data->i2c_dev, NCT38XX_REG_ALERT, (uint8_t *)&alert, sizeof(alert))) {
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ret = -EIO;
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goto unlock;
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}
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alert &= alert_mask;
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if (alert) {
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if (i2c_burst_write_dt(data->i2c_dev, NCT38XX_REG_ALERT, (uint8_t *)&alert,
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sizeof(alert))) {
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ret = -EIO;
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goto unlock;
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}
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}
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if (i2c_burst_write_dt(data->i2c_dev, NCT38XX_REG_ALERT_MASK, (uint8_t *)&alert_mask,
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sizeof(alert_mask))) {
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ret = -EIO;
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goto unlock;
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}
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unlock:
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k_sem_give(data->lock);
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return ret;
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}
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static int nct38xx_gpio_init(const struct device *dev)
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{
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const struct gpio_nct38xx_config *const config = dev->config;
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struct gpio_nct38xx_data *data = dev->data;
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/* Verify multi-function parent is ready */
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if (!device_is_ready(config->mfd)) {
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LOG_ERR("%s device not ready", config->mfd->name);
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return -ENODEV;
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}
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data->lock = mfd_nct38xx_get_lock_reference(config->mfd);
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data->i2c_dev = mfd_nct38xx_get_i2c_dt_spec(config->mfd);
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if (IS_ENABLED(CONFIG_GPIO_NCT38XX_ALERT)) {
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nct38xx_init_interrupt(dev);
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}
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return 0;
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}
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#define GPIO_NCT38XX_DEVICE_INSTANCE(inst) \
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static const struct device *sub_gpio_dev_##inst[] = { \
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DT_INST_FOREACH_CHILD_STATUS_OKAY_SEP(inst, DEVICE_DT_GET, (,)) \
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}; \
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static const struct gpio_nct38xx_config gpio_nct38xx_cfg_##inst = { \
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.mfd = DEVICE_DT_GET(DT_INST_PARENT(inst)), \
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.sub_gpio_dev = sub_gpio_dev_##inst, \
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.sub_gpio_port_num = ARRAY_SIZE(sub_gpio_dev_##inst), \
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}; \
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static struct gpio_nct38xx_data gpio_nct38xx_data_##inst = { \
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.dev = DEVICE_DT_INST_GET(inst), \
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}; \
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DEVICE_DT_INST_DEFINE(inst, nct38xx_gpio_init, NULL, &gpio_nct38xx_data_##inst, \
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&gpio_nct38xx_cfg_##inst, POST_KERNEL, \
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CONFIG_GPIO_NCT38XX_INIT_PRIORITY, NULL);
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DT_INST_FOREACH_STATUS_OKAY(GPIO_NCT38XX_DEVICE_INSTANCE)
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/* The nct38xx MFD parent must be initialized before this driver */
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BUILD_ASSERT(CONFIG_GPIO_NCT38XX_INIT_PRIORITY > CONFIG_MFD_INIT_PRIORITY);
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