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/* Copyright 2021 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
#include "gpio/gpio.h"
LOG_MODULE_REGISTER(shim_cros_gpio, LOG_LEVEL_ERR);
static const struct unused_pin_config unused_pin_configs[] = {
UNUSED_GPIO_CONFIG_LIST
};
int gpio_config_unused_pins(void)
{
for (size_t i = 0; i < ARRAY_SIZE(unused_pin_configs); ++i) {
int rv;
int flags;
const struct device *dev =
device_get_binding(unused_pin_configs[i].dev_name);
if (dev == NULL) {
LOG_ERR("Not found (%s)",
unused_pin_configs[i].dev_name);
return -ENOTSUP;
}
/*
* Set the default setting for the floating IOs. The floating
* IOs cause the leakage current. Set unused pins as input with
* internal PU to prevent extra power consumption.
*/
if (unused_pin_configs[i].flags == 0)
flags = GPIO_INPUT | GPIO_PULL_UP;
else
flags = unused_pin_configs[i].flags;
rv = gpio_pin_configure(dev, unused_pin_configs[i].pin, flags);
if (rv < 0) {
LOG_ERR("Config failed %s-%d (%d)",
unused_pin_configs[i].dev_name,
unused_pin_configs[i].pin, rv);
return rv;
}
}
return 0;
}
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