* drivers/pinctrl/pinctrl.c
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include <nuttx/fs/fs.h>
#include <nuttx/pinctrl/pinctrl.h>
* Private Function Prototypes
****************************************************************************/
static int pinctrl_open(FAR struct file *filep);
static int pinctrl_close(FAR struct file *filep);
static ssize_t pinctrl_read(FAR struct file *filep, FAR char *buffer,
size_t buflen);
static ssize_t pinctrl_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen);
static int pinctrl_ioctl(FAR struct file *filep, int cmd,
unsigned long arg);
* Private Data
****************************************************************************/
static const struct file_operations g_pinctrl_drvrops =
{
pinctrl_open,
pinctrl_close,
pinctrl_read,
pinctrl_write,
NULL,
pinctrl_ioctl
};
* Private Functions
****************************************************************************/
* Name: pinctrl_open
*
* Description:
* Standard character driver open method.
*
****************************************************************************/
static int pinctrl_open(FAR struct file *filep)
{
return OK;
}
* Name: pinctrl_close
*
* Description:
* Standard character driver close method.
*
****************************************************************************/
static int pinctrl_close(FAR struct file *filep)
{
return OK;
}
* Name: pinctrl_read
*
* Description:
* Standard character driver read method.
*
****************************************************************************/
static ssize_t pinctrl_read(FAR struct file *filep, FAR char *buffer,
size_t buflen)
{
return 0;
}
* Name: pinctrl_write
*
* Description:
* Standard character driver write method.
*
****************************************************************************/
static ssize_t pinctrl_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen)
{
return buflen;
}
* Name: pinctrl_ioctl
*
* Description:
* Standard character driver ioctl method.
*
****************************************************************************/
static int pinctrl_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
FAR struct inode *inode;
FAR struct pinctrl_dev_s *dev;
FAR struct pinctrl_param_s *param;
int ret;
DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
inode = filep->f_inode;
DEBUGASSERT(inode->i_private != NULL);
dev = inode->i_private;
switch (cmd)
{
* Description: Set the mux function of the pinctrl pin
* Argument: A pointer to an instance of struct pinctrl_param_s
*/
case PINCTRLC_SETFUNCTION:
{
param = (FAR struct pinctrl_param_s *)((uintptr_t)arg);
ret = PINCTRL_SETFUNCTION(dev, param->pin, param->para.function);
}
break;
* Description: Set the driver strength of the pinctrl pin
* Argument: A pointer to an instance of struct pinctrl_param_s
*/
case PINCTRLC_SETSTRENGTH:
{
param = (FAR struct pinctrl_param_s *)((uintptr_t)arg);
ret = PINCTRL_SETSTRENGTH(dev, param->pin, param->para.strength);
}
break;
* Description: Set the driver type of the pinctrl pin
* Argument: A pointer to an instance of struct pinctrl_param_s
*/
case PINCTRLC_SETDRIVER:
{
param = (FAR struct pinctrl_param_s *)((uintptr_t)arg);
ret = PINCTRL_SETDRIVER(dev, param->pin, param->para.type);
}
break;
* Description: Set slewrate of the pinctrl pin
* Argument: A pointer to an instance of struct pinctrl_param_s
*/
case PINCTRLC_SETSLEWRATE:
{
param = (FAR struct pinctrl_param_s *)((uintptr_t)arg);
ret = PINCTRL_SETSLEWRATE(dev, param->pin, param->para.slewrate);
}
break;
* Description: Select gpio function of pinctrl pin
* Argument: The uint32_t pinctrl number
*/
case PINCTRLC_SELECTGPIO:
{
ret = PINCTRL_SELECTGPIO(dev, arg);
}
break;
default:
ret = -ENOTTY;
break;
}
return ret;
}
* Public Functions
****************************************************************************/
* Name: pinctrl_register
*
* Description:
* Register PINCTRL device driver.
*
****************************************************************************/
int pinctrl_register(FAR struct pinctrl_dev_s *dev, int minor)
{
char devname[32];
snprintf(devname, 16, "/dev/pinctrl%u", (unsigned int)minor);
return register_driver(devname, &g_pinctrl_drvrops, 0666, dev);
}
* Name: pinctrl_unregister
*
* Description:
* Unregister PINCTRL device driver.
*
****************************************************************************/
void pinctrl_unregister(FAR struct pinctrl_dev_s *dev, int minor)
{
char devname[32];
snprintf(devname, 16, "/dev/pinctrl%u", (unsigned int)minor);
(void)unregister_driver(devname);
}