// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2022 Rockchip Electronics Co. Ltd.
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/list.h>
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#include <linux/uaccess.h>
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#include <linux/ioctl.h>
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#include <linux/types.h>
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#include <linux/miscdevice.h>
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#include <linux/slab.h>
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#include <linux/gpio/driver.h>
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#include <uapi/linux/rk-iomux.h>
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#include "../../pinctrl/pinctrl-rockchip.h"
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struct rk_iomux_device {
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struct miscdevice dev;
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};
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static long rk_iomux_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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struct iomux_ioctl_data data;
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int ret = 0;
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if (_IOC_SIZE(cmd) > sizeof(data))
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return -EINVAL;
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if (copy_from_user(&data, (void __user *)arg, _IOC_SIZE(cmd)))
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return -EFAULT;
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if (!(_IOC_DIR(cmd) & _IOC_WRITE))
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memset(&data, 0, sizeof(data));
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switch (cmd) {
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case IOMUX_IOC_MUX_SET:
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ret = rk_iomux_set(data.bank, data.pin, data.mux);
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if (ret)
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return ret;
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break;
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case IOMUX_IOC_MUX_GET:
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ret = rk_iomux_get(data.bank, data.pin, &data.mux);
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if (ret)
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return ret;
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break;
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default:
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return -ENOTTY;
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}
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if (_IOC_DIR(cmd) & _IOC_READ) {
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if (copy_to_user((void __user *)arg, &data, _IOC_SIZE(cmd)))
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return -EFAULT;
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}
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return ret;
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}
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static const struct file_operations rk_iomux_fops = {
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.owner = THIS_MODULE,
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.unlocked_ioctl = rk_iomux_ioctl,
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.compat_ioctl = compat_ptr_ioctl,
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};
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static __init int rk_iomux_device_create(void)
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{
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struct rk_iomux_device *cdev;
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int ret;
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cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
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if (!cdev)
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return -ENOMEM;
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cdev->dev.minor = MISC_DYNAMIC_MINOR;
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cdev->dev.name = "iomux";
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cdev->dev.fops = &rk_iomux_fops;
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cdev->dev.parent = NULL;
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ret = misc_register(&cdev->dev);
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if (ret) {
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pr_err("failed to register iomux device (%d)\n", ret);
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return ret;
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}
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return 0;
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}
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late_initcall(rk_iomux_device_create);
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