^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) * Copyright (c) Intel Corp. 2007.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * develop this driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This file is part of the Carillo Ranch video subsystem driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Alan Hourihane <alanh-at-tungstengraphics-dot-com>
^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/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/backlight.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/lcd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /* The LVDS- and panel power controls sits on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * GPIO port of the ISA bridge.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define CRVML_DEVICE_LPC 0x27B8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define CRVML_REG_GPIOBAR 0x48
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define CRVML_REG_GPIOEN 0x4C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define CRVML_GPIOEN_BIT (1 << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define CRVML_PANEL_PORT 0x38
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define CRVML_LVDS_ON 0x00000001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define CRVML_PANEL_ON 0x00000002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define CRVML_BACKLIGHT_OFF 0x00000004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* The PLL Clock register sits on Host bridge */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define CRVML_DEVICE_MCH 0x5001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define CRVML_REG_MCHBAR 0x44
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define CRVML_REG_MCHEN 0x54
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define CRVML_MCHEN_BIT (1 << 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define CRVML_MCHMAP_SIZE 4096
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define CRVML_REG_CLOCK 0xc3c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define CRVML_CLOCK_SHIFT 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define CRVML_CLOCK_MASK 0x00000f00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static struct pci_dev *lpc_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static u32 gpio_bar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct cr_panel {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct backlight_device *cr_backlight_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct lcd_device *cr_lcd_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int cr_backlight_set_intensity(struct backlight_device *bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) u32 addr = gpio_bar + CRVML_PANEL_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) u32 cur = inl(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (backlight_get_brightness(bd) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* OFF */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) cur |= CRVML_BACKLIGHT_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) outl(cur, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* FULL ON */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) cur &= ~CRVML_BACKLIGHT_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) outl(cur, addr);
^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 0;
^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 int cr_backlight_get_intensity(struct backlight_device *bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) u32 addr = gpio_bar + CRVML_PANEL_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) u32 cur = inl(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) u8 intensity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (cur & CRVML_BACKLIGHT_OFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) intensity = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) intensity = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return intensity;
^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) static const struct backlight_ops cr_backlight_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .get_brightness = cr_backlight_get_intensity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .update_status = cr_backlight_set_intensity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) static void cr_panel_on(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) u32 addr = gpio_bar + CRVML_PANEL_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) u32 cur = inl(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (!(cur & CRVML_PANEL_ON)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /* Make sure LVDS controller is down. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (cur & 0x00000001) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) cur &= ~CRVML_LVDS_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) outl(cur, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) /* Power up Panel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) schedule_timeout(HZ / 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) cur |= CRVML_PANEL_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) outl(cur, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /* Power up LVDS controller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (!(cur & CRVML_LVDS_ON)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) schedule_timeout(HZ / 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) outl(cur | CRVML_LVDS_ON, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static void cr_panel_off(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) u32 addr = gpio_bar + CRVML_PANEL_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) u32 cur = inl(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* Power down LVDS controller first to avoid high currents */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (cur & CRVML_LVDS_ON) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) cur &= ~CRVML_LVDS_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) outl(cur, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (cur & CRVML_PANEL_ON) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) schedule_timeout(HZ / 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) outl(cur & ~CRVML_PANEL_ON, addr);
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static int cr_lcd_set_power(struct lcd_device *ld, int power)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (power == FB_BLANK_UNBLANK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) cr_panel_on();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (power == FB_BLANK_POWERDOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) cr_panel_off();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static struct lcd_ops cr_lcd_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) .set_power = cr_lcd_set_power,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static int cr_backlight_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct backlight_properties props;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct backlight_device *bdp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct lcd_device *ldp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct cr_panel *crp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) u8 dev_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) lpc_dev = pci_get_device(PCI_VENDOR_ID_INTEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) CRVML_DEVICE_LPC, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) if (!lpc_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) pr_err("INTEL CARILLO RANCH LPC not found.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) pci_read_config_byte(lpc_dev, CRVML_REG_GPIOEN, &dev_en);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (!(dev_en & CRVML_GPIOEN_BIT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) pr_err("Carillo Ranch GPIO device was not enabled.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) pci_dev_put(lpc_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return -ENODEV;
^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) memset(&props, 0, sizeof(struct backlight_properties));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) props.type = BACKLIGHT_RAW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) bdp = devm_backlight_device_register(&pdev->dev, "cr-backlight",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) &pdev->dev, NULL, &cr_backlight_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) &props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (IS_ERR(bdp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) pci_dev_put(lpc_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return PTR_ERR(bdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) ldp = devm_lcd_device_register(&pdev->dev, "cr-lcd", &pdev->dev, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) &cr_lcd_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (IS_ERR(ldp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) pci_dev_put(lpc_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return PTR_ERR(ldp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) pci_read_config_dword(lpc_dev, CRVML_REG_GPIOBAR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) &gpio_bar);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) gpio_bar &= ~0x3F;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) crp = devm_kzalloc(&pdev->dev, sizeof(*crp), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (!crp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) pci_dev_put(lpc_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) crp->cr_backlight_device = bdp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) crp->cr_lcd_device = ldp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) crp->cr_backlight_device->props.power = FB_BLANK_UNBLANK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) crp->cr_backlight_device->props.brightness = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) cr_backlight_set_intensity(crp->cr_backlight_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) cr_lcd_set_power(crp->cr_lcd_device, FB_BLANK_UNBLANK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) platform_set_drvdata(pdev, crp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static int cr_backlight_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct cr_panel *crp = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) crp->cr_backlight_device->props.power = FB_BLANK_POWERDOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) crp->cr_backlight_device->props.brightness = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) crp->cr_backlight_device->props.max_brightness = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) cr_backlight_set_intensity(crp->cr_backlight_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) cr_lcd_set_power(crp->cr_lcd_device, FB_BLANK_POWERDOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) pci_dev_put(lpc_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static struct platform_driver cr_backlight_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) .probe = cr_backlight_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) .remove = cr_backlight_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) .name = "cr_backlight",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) static struct platform_device *crp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static int __init cr_backlight_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) int ret = platform_driver_register(&cr_backlight_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) crp = platform_device_register_simple("cr_backlight", -1, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) if (IS_ERR(crp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) platform_driver_unregister(&cr_backlight_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return PTR_ERR(crp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) pr_info("Carillo Ranch Backlight Driver Initialized.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static void __exit cr_backlight_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) platform_device_unregister(crp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) platform_driver_unregister(&cr_backlight_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) module_init(cr_backlight_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) module_exit(cr_backlight_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) MODULE_AUTHOR("Tungsten Graphics Inc.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) MODULE_DESCRIPTION("Carillo Ranch Backlight Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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