^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Backlight Driver for Intel-based Apples
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) Red Hat <mjg@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Based on code from Pommed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2006 Nicolas Boichat <nicolas @boichat.ch>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2006 Felipe Alfaro Solana <felipe_alfaro @linuxmail.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 2007 Julien BLACHE <jb@jblache.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * This driver triggers SMIs which cause the firmware to change the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * backlight brightness. This is icky in many ways, but it's impractical to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * get at the firmware code in order to figure out what it's actually doing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/backlight.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/apple_bl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static struct backlight_device *apple_backlight_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct hw_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /* I/O resource to allocate. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) unsigned long iostart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) unsigned long iolen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /* Backlight operations structure. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) const struct backlight_ops backlight_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) void (*set_brightness)(int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static const struct hw_data *hw_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* Module parameters. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int debug;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) module_param_named(debug, debug, int, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) MODULE_PARM_DESC(debug, "Set to one to enable debugging messages.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * Implementation for machines with Intel chipset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static void intel_chipset_set_brightness(int intensity)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) outb(0x04 | (intensity << 4), 0xb3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) outb(0xbf, 0xb2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static int intel_chipset_send_intensity(struct backlight_device *bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) int intensity = bd->props.brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (debug)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) pr_debug("setting brightness to %d\n", intensity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) intel_chipset_set_brightness(intensity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static int intel_chipset_get_intensity(struct backlight_device *bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int intensity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) outb(0x03, 0xb3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) outb(0xbf, 0xb2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) intensity = inb(0xb3) >> 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (debug)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) pr_debug("read brightness of %d\n", intensity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return intensity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static const struct hw_data intel_chipset_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .iostart = 0xb2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .iolen = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) .backlight_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) .options = BL_CORE_SUSPENDRESUME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .get_brightness = intel_chipset_get_intensity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .update_status = intel_chipset_send_intensity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .set_brightness = intel_chipset_set_brightness,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * Implementation for machines with Nvidia chipset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static void nvidia_chipset_set_brightness(int intensity)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) outb(0x04 | (intensity << 4), 0x52f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) outb(0xbf, 0x52e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static int nvidia_chipset_send_intensity(struct backlight_device *bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) int intensity = bd->props.brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (debug)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) pr_debug("setting brightness to %d\n", intensity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) nvidia_chipset_set_brightness(intensity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static int nvidia_chipset_get_intensity(struct backlight_device *bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int intensity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) outb(0x03, 0x52f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) outb(0xbf, 0x52e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) intensity = inb(0x52f) >> 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (debug)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) pr_debug("read brightness of %d\n", intensity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return intensity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static const struct hw_data nvidia_chipset_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .iostart = 0x52e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .iolen = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .backlight_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .options = BL_CORE_SUSPENDRESUME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .get_brightness = nvidia_chipset_get_intensity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .update_status = nvidia_chipset_send_intensity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .set_brightness = nvidia_chipset_set_brightness,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static int apple_bl_add(struct acpi_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) struct backlight_properties props;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) struct pci_dev *host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) int intensity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) host = pci_get_domain_bus_and_slot(0, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (!host) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) pr_err("unable to find PCI host\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return -ENODEV;
^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) if (host->vendor == PCI_VENDOR_ID_INTEL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) hw_data = &intel_chipset_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) else if (host->vendor == PCI_VENDOR_ID_NVIDIA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) hw_data = &nvidia_chipset_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) pci_dev_put(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (!hw_data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) pr_err("unknown hardware\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /* Check that the hardware responds - this may not work under EFI */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) intensity = hw_data->backlight_ops.get_brightness(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (!intensity) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) hw_data->set_brightness(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (!hw_data->backlight_ops.get_brightness(NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) hw_data->set_brightness(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (!request_region(hw_data->iostart, hw_data->iolen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) "Apple backlight"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) memset(&props, 0, sizeof(struct backlight_properties));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) props.type = BACKLIGHT_PLATFORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) props.max_brightness = 15;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) apple_backlight_device = backlight_device_register("apple_backlight",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) NULL, NULL, &hw_data->backlight_ops, &props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (IS_ERR(apple_backlight_device)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) release_region(hw_data->iostart, hw_data->iolen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) return PTR_ERR(apple_backlight_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) apple_backlight_device->props.brightness =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) hw_data->backlight_ops.get_brightness(apple_backlight_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) backlight_update_status(apple_backlight_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static int apple_bl_remove(struct acpi_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) backlight_device_unregister(apple_backlight_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) release_region(hw_data->iostart, hw_data->iolen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) hw_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static const struct acpi_device_id apple_bl_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {"APP0002", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {"", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static struct acpi_driver apple_bl_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) .name = "Apple backlight",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) .ids = apple_bl_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) .ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) .add = apple_bl_add,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) .remove = apple_bl_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static atomic_t apple_bl_registered = ATOMIC_INIT(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) int apple_bl_register(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (atomic_xchg(&apple_bl_registered, 1) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return acpi_bus_register_driver(&apple_bl_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) EXPORT_SYMBOL_GPL(apple_bl_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) void apple_bl_unregister(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (atomic_xchg(&apple_bl_registered, 0) == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) acpi_bus_unregister_driver(&apple_bl_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) EXPORT_SYMBOL_GPL(apple_bl_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static int __init apple_bl_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return apple_bl_register();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static void __exit apple_bl_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) apple_bl_unregister();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) module_init(apple_bl_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) module_exit(apple_bl_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) MODULE_DESCRIPTION("Apple Backlight Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) MODULE_DEVICE_TABLE(acpi, apple_bl_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) MODULE_ALIAS("mbp_nvidia_bl");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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