blob: 9108c4d916ac8f916106cd02521f5e9f91c7d4c1 [file] [log] [blame]
/*
* Copyright (c) 2024 SILA Embedded Solutions GmbH
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT infineon_tle9104_gpio
#include <errno.h>
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/init.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/gpio/gpio_utils.h>
#include <zephyr/drivers/mfd/tle9104.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(gpio_tle9104, CONFIG_GPIO_LOG_LEVEL);
struct tle9104_gpio_config {
/* gpio_driver_config needs to be first */
struct gpio_driver_config common;
/* parent MFD */
const struct device *parent;
};
struct tle9104_gpio_data {
/* gpio_driver_data needs to be first */
struct gpio_driver_data common;
/* each bit is one output channel, bit 0 = OUT1, ... */
uint8_t state;
/* each bit defines if the output channel is configured, see state */
uint8_t configured;
struct k_mutex lock;
};
static int tle9104_gpio_pin_configure(const struct device *dev, gpio_pin_t pin, gpio_flags_t flags)
{
const struct tle9104_gpio_config *config = dev->config;
struct tle9104_gpio_data *data = dev->data;
int result;
/* cannot execute a bus operation in an ISR context */
if (k_is_in_isr()) {
return -EWOULDBLOCK;
}
if (pin >= TLE9104_GPIO_COUNT) {
LOG_ERR("invalid pin number %i", pin);
return -EINVAL;
}
if ((flags & GPIO_INPUT) != 0) {
LOG_ERR("cannot configure pin as input");
return -ENOTSUP;
}
if ((flags & GPIO_OUTPUT) == 0) {
LOG_ERR("pin must be configured as an output");
return -ENOTSUP;
}
if ((flags & GPIO_SINGLE_ENDED) == 0) {
LOG_ERR("pin must be configured as single ended");
return -ENOTSUP;
}
if ((flags & GPIO_LINE_OPEN_DRAIN) == 0) {
LOG_ERR("pin must be configured as open drain");
return -ENOTSUP;
}
if ((flags & GPIO_PULL_UP) != 0) {
LOG_ERR("pin cannot have a pull up configured");
return -ENOTSUP;
}
if ((flags & GPIO_PULL_DOWN) != 0) {
LOG_ERR("pin cannot have a pull down configured");
return -ENOTSUP;
}
k_mutex_lock(&data->lock, K_FOREVER);
if ((flags & GPIO_OUTPUT_INIT_LOW) != 0) {
WRITE_BIT(data->state, pin, 0);
} else if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0) {
WRITE_BIT(data->state, pin, 1);
}
WRITE_BIT(data->configured, pin, 1);
result = tle9104_write_state(config->parent, data->state);
k_mutex_unlock(&data->lock);
return result;
}
static int tle9104_gpio_port_get_raw(const struct device *dev, uint32_t *value)
{
ARG_UNUSED(dev);
ARG_UNUSED(value);
LOG_ERR("input pins are not available");
return -ENOTSUP;
}
static int tle9104_gpio_port_set_masked_raw(const struct device *dev, uint32_t mask, uint32_t value)
{
const struct tle9104_gpio_config *config = dev->config;
struct tle9104_gpio_data *data = dev->data;
int result;
/* cannot execute a bus operation in an ISR context */
if (k_is_in_isr()) {
return -EWOULDBLOCK;
}
k_mutex_lock(&data->lock, K_FOREVER);
data->state = (data->state & ~mask) | (mask & value);
result = tle9104_write_state(config->parent, data->state);
k_mutex_unlock(&data->lock);
return result;
}
static int tle9104_gpio_port_set_bits_raw(const struct device *dev, uint32_t mask)
{
return tle9104_gpio_port_set_masked_raw(dev, mask, mask);
}
static int tle9104_gpio_port_clear_bits_raw(const struct device *dev, uint32_t mask)
{
return tle9104_gpio_port_set_masked_raw(dev, mask, 0);
}
static int tle9104_gpio_port_toggle_bits(const struct device *dev, uint32_t mask)
{
const struct tle9104_gpio_config *config = dev->config;
struct tle9104_gpio_data *data = dev->data;
int result;
/* cannot execute a bus operation in an ISR context */
if (k_is_in_isr()) {
return -EWOULDBLOCK;
}
k_mutex_lock(&data->lock, K_FOREVER);
data->state ^= mask;
result = tle9104_write_state(config->parent, data->state);
k_mutex_unlock(&data->lock);
return result;
}
static int tle9104_gpio_pin_interrupt_configure(const struct device *dev, gpio_pin_t pin,
enum gpio_int_mode mode, enum gpio_int_trig trig)
{
ARG_UNUSED(dev);
ARG_UNUSED(pin);
ARG_UNUSED(mode);
ARG_UNUSED(trig);
return -ENOTSUP;
}
static const struct gpio_driver_api api_table = {
.pin_configure = tle9104_gpio_pin_configure,
.port_get_raw = tle9104_gpio_port_get_raw,
.port_set_masked_raw = tle9104_gpio_port_set_masked_raw,
.port_set_bits_raw = tle9104_gpio_port_set_bits_raw,
.port_clear_bits_raw = tle9104_gpio_port_clear_bits_raw,
.port_toggle_bits = tle9104_gpio_port_toggle_bits,
.pin_interrupt_configure = tle9104_gpio_pin_interrupt_configure,
};
static int tle9104_gpio_init(const struct device *dev)
{
const struct tle9104_gpio_config *config = dev->config;
struct tle9104_gpio_data *data = dev->data;
LOG_DBG("initialize TLE9104 GPIO instance %s", dev->name);
if (!device_is_ready(config->parent)) {
LOG_ERR("%s: parent MFD is not ready", dev->name);
return -EINVAL;
}
int result = k_mutex_init(&data->lock);
if (result != 0) {
LOG_ERR("unable to initialize mutex");
return result;
}
return 0;
}
#define TLE9104_GPIO_INIT(inst) \
static const struct tle9104_gpio_config tle9104_gpio_##inst##_config = { \
.common = { \
.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(inst), \
}, \
.parent = DEVICE_DT_GET(DT_PARENT(DT_DRV_INST(inst))), \
}; \
\
static struct tle9104_gpio_data tle9104_gpio_##inst##_drvdata; \
\
/* This has to be initialized after the SPI peripheral. */ \
DEVICE_DT_INST_DEFINE(inst, tle9104_gpio_init, NULL, &tle9104_gpio_##inst##_drvdata, \
&tle9104_gpio_##inst##_config, POST_KERNEL, \
CONFIG_GPIO_TLE9104_INIT_PRIORITY, &api_table);
DT_INST_FOREACH_STATUS_OKAY(TLE9104_GPIO_INIT)