| /* |
| * Copyright (c) 2018 Aapo Vienamo |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <init.h> |
| #include <drivers/gpio.h> |
| #include <sys/printk.h> |
| |
| #define VDD_PWR_CTRL_GPIO_PIN 30 |
| #define CCS_VDD_PWR_CTRL_GPIO_PIN 10 |
| |
| struct pwr_ctrl_cfg { |
| const char *port; |
| uint32_t pin; |
| }; |
| |
| static int pwr_ctrl_init(const struct device *dev) |
| { |
| const struct pwr_ctrl_cfg *cfg = dev->config; |
| const struct device *gpio; |
| |
| gpio = device_get_binding(cfg->port); |
| if (!gpio) { |
| printk("Could not bind device \"%s\"\n", cfg->port); |
| return -ENODEV; |
| } |
| |
| gpio_pin_configure(gpio, cfg->pin, GPIO_OUTPUT_HIGH); |
| |
| k_sleep(K_MSEC(1)); /* Wait for the rail to come up and stabilize */ |
| |
| return 0; |
| } |
| |
| /* |
| * The CCS811 sensor is connected to the CCS_VDD power rail, which is downstream |
| * from the VDD power rail. Both of these power rails need to be enabled before |
| * the sensor driver init can be performed. The VDD rail also has to be powered up |
| * before the CCS_VDD rail. These checks are to enforce the power up sequence |
| * constraints. |
| */ |
| |
| #if CONFIG_BOARD_VDD_PWR_CTRL_INIT_PRIORITY <= CONFIG_GPIO_INIT_PRIORITY |
| #error GPIO_INIT_PRIORITY must be lower than \ |
| BOARD_VDD_PWR_CTRL_INIT_PRIORITY |
| #endif |
| |
| static const struct pwr_ctrl_cfg vdd_pwr_ctrl_cfg = { |
| .port = DT_LABEL(DT_NODELABEL(gpio0)), |
| .pin = VDD_PWR_CTRL_GPIO_PIN, |
| }; |
| |
| DEVICE_DEFINE(vdd_pwr_ctrl_init, "", pwr_ctrl_init, NULL, NULL, |
| &vdd_pwr_ctrl_cfg, |
| POST_KERNEL, CONFIG_BOARD_VDD_PWR_CTRL_INIT_PRIORITY, |
| NULL); |
| |
| #ifdef CONFIG_SENSOR |
| |
| #if CONFIG_BOARD_CCS_VDD_PWR_CTRL_INIT_PRIORITY <= CONFIG_BOARD_VDD_PWR_CTRL_INIT_PRIORITY |
| #error BOARD_VDD_PWR_CTRL_INIT_PRIORITY must be lower than BOARD_CCS_VDD_PWR_CTRL_INIT_PRIORITY |
| #endif |
| |
| #if CONFIG_SENSOR_INIT_PRIORITY <= CONFIG_BOARD_CCS_VDD_PWR_CTRL_INIT_PRIORITY |
| #error BOARD_CCS_VDD_PWR_CTRL_INIT_PRIORITY must be lower than SENSOR_INIT_PRIORITY |
| #endif |
| |
| static const struct pwr_ctrl_cfg ccs_vdd_pwr_ctrl_cfg = { |
| .port = DT_LABEL(DT_INST(0, semtech_sx1509b)), |
| .pin = CCS_VDD_PWR_CTRL_GPIO_PIN, |
| }; |
| |
| DEVICE_DEFINE(ccs_vdd_pwr_ctrl_init, "", pwr_ctrl_init, NULL, NULL, |
| &ccs_vdd_pwr_ctrl_cfg, POST_KERNEL, |
| CONFIG_BOARD_CCS_VDD_PWR_CTRL_INIT_PRIORITY, NULL); |
| |
| #endif |