| /** @file |
| * @brief Modem pin setup for modem context driver |
| * |
| * GPIO-based pin handling for the modem context driver |
| */ |
| |
| /* |
| * Copyright (c) 2019 Foundries.io |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/types.h> |
| #include <device.h> |
| #include <drivers/gpio.h> |
| |
| #include "modem_context.h" |
| |
| int modem_pin_read(struct modem_context *ctx, uint32_t pin) |
| { |
| if (pin >= ctx->pins_len) { |
| return -ENODEV; |
| } |
| |
| return gpio_pin_get(ctx->pins[pin].gpio_port_dev, |
| ctx->pins[pin].pin); |
| } |
| |
| int modem_pin_write(struct modem_context *ctx, uint32_t pin, uint32_t value) |
| { |
| if (pin >= ctx->pins_len) { |
| return -ENODEV; |
| } |
| |
| return gpio_pin_set(ctx->pins[pin].gpio_port_dev, |
| ctx->pins[pin].pin, value); |
| } |
| |
| int modem_pin_config(struct modem_context *ctx, uint32_t pin, bool enable) |
| { |
| if (pin >= ctx->pins_len) { |
| return -ENODEV; |
| } |
| |
| return gpio_pin_configure(ctx->pins[pin].gpio_port_dev, |
| ctx->pins[pin].pin, |
| enable ? ctx->pins[pin].init_flags : |
| GPIO_INPUT); |
| } |
| |
| int modem_pin_init(struct modem_context *ctx) |
| { |
| int i, ret; |
| |
| /* setup port devices and pin directions */ |
| for (i = 0; i < ctx->pins_len; i++) { |
| ctx->pins[i].gpio_port_dev = |
| device_get_binding(ctx->pins[i].dev_name); |
| if (!ctx->pins[i].gpio_port_dev) { |
| return -ENODEV; |
| } |
| |
| ret = modem_pin_config(ctx, i, true); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |