^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * dell-smo8800.c - Dell Latitude ACPI SMO88XX freefall sensor driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2012 Sonal Santan <sonal.santan@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2014 Pali Rohár <pali@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * This is loosely based on lis3lv02d driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define DRIVER_NAME "smo8800"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/miscdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct smo8800_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) u32 irq; /* acpi device irq */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) atomic_t counter; /* count after last read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct miscdevice miscdev; /* for /dev/freefall */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) unsigned long misc_opened; /* whether the device is open */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) wait_queue_head_t misc_wait; /* Wait queue for the misc dev */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct device *dev; /* acpi device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static irqreturn_t smo8800_interrupt_quick(int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct smo8800_device *smo8800 = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) atomic_inc(&smo8800->counter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) wake_up_interruptible(&smo8800->misc_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return IRQ_WAKE_THREAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static irqreturn_t smo8800_interrupt_thread(int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct smo8800_device *smo8800 = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) dev_info(smo8800->dev, "detected free fall\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static acpi_status smo8800_get_resource(struct acpi_resource *resource,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) void *context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct acpi_resource_extended_irq *irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (resource->type != ACPI_RESOURCE_TYPE_EXTENDED_IRQ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) irq = &resource->data.extended_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (!irq || !irq->interrupt_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) *((u32 *)context) = irq->interrupts[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return AE_CTRL_TERMINATE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static u32 smo8800_get_irq(struct acpi_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) u32 irq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) smo8800_get_resource, &irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) dev_err(&device->dev, "acpi_walk_resources failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static ssize_t smo8800_misc_read(struct file *file, char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) size_t count, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct smo8800_device *smo8800 = container_of(file->private_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct smo8800_device, miscdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) u32 data = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) unsigned char byte_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) ssize_t retval = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (count < 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) atomic_set(&smo8800->counter, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) retval = wait_event_interruptible(smo8800->misc_wait,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) (data = atomic_xchg(&smo8800->counter, 0)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) retval = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (data < 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) byte_data = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) byte_data = 255;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (put_user(byte_data, buf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) retval = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static int smo8800_misc_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct smo8800_device *smo8800 = container_of(file->private_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct smo8800_device, miscdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (test_and_set_bit(0, &smo8800->misc_opened))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return -EBUSY; /* already open */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) atomic_set(&smo8800->counter, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static int smo8800_misc_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) struct smo8800_device *smo8800 = container_of(file->private_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct smo8800_device, miscdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) clear_bit(0, &smo8800->misc_opened); /* release the device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static const struct file_operations smo8800_misc_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .read = smo8800_misc_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .open = smo8800_misc_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .release = smo8800_misc_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static int smo8800_add(struct acpi_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct smo8800_device *smo8800;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) smo8800 = devm_kzalloc(&device->dev, sizeof(*smo8800), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (!smo8800) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) dev_err(&device->dev, "failed to allocate device data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) smo8800->dev = &device->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) smo8800->miscdev.minor = MISC_DYNAMIC_MINOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) smo8800->miscdev.name = "freefall";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) smo8800->miscdev.fops = &smo8800_misc_fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) init_waitqueue_head(&smo8800->misc_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) err = misc_register(&smo8800->miscdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) dev_err(&device->dev, "failed to register misc dev: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) device->driver_data = smo8800;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) smo8800->irq = smo8800_get_irq(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (!smo8800->irq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) dev_err(&device->dev, "failed to obtain IRQ\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) err = request_threaded_irq(smo8800->irq, smo8800_interrupt_quick,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) smo8800_interrupt_thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) IRQF_TRIGGER_RISING | IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) DRIVER_NAME, smo8800);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) dev_err(&device->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) "failed to request thread for IRQ %d: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) smo8800->irq, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) dev_dbg(&device->dev, "device /dev/freefall registered with IRQ %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) smo8800->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) misc_deregister(&smo8800->miscdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static int smo8800_remove(struct acpi_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) struct smo8800_device *smo8800 = device->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) free_irq(smo8800->irq, smo8800);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) misc_deregister(&smo8800->miscdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) dev_dbg(&device->dev, "device /dev/freefall unregistered\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) /* NOTE: Keep this list in sync with drivers/i2c/busses/i2c-i801.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static const struct acpi_device_id smo8800_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) { "SMO8800", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) { "SMO8801", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) { "SMO8810", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) { "SMO8811", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) { "SMO8820", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) { "SMO8821", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) { "SMO8830", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) { "SMO8831", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) { "", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) MODULE_DEVICE_TABLE(acpi, smo8800_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static struct acpi_driver smo8800_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) .name = DRIVER_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) .class = "Latitude",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) .ids = smo8800_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) .ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) .add = smo8800_add,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) .remove = smo8800_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) module_acpi_driver(smo8800_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) MODULE_DESCRIPTION("Dell Latitude freefall driver (ACPI SMO88XX)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) MODULE_AUTHOR("Sonal Santan, Pali Rohár");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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