^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Bachmann ot200 leds driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Christian Gmeiner <christian.gmeiner@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * License: GPL as published by the FSF.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct ot200_led {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct led_classdev cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) unsigned long port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) u8 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * The device has three leds on the back panel (led_err, led_init and led_run)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * and can handle up to seven leds on the front panel.
^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 struct ot200_led leds[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) .name = "led_run",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .port = 0x5a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .mask = BIT(0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .name = "led_init",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .port = 0x5a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .mask = BIT(1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .name = "led_err",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .port = 0x5a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) .mask = BIT(2),
^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) .name = "led_1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .port = 0x49,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) .mask = BIT(6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .name = "led_2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) .port = 0x49,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) .mask = BIT(5),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .name = "led_3",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) .port = 0x49,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) .mask = BIT(4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .name = "led_4",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) .port = 0x49,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) .mask = BIT(3),
^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) .name = "led_5",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) .port = 0x49,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .mask = BIT(2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) .name = "led_6",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) .port = 0x49,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .mask = BIT(1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) .name = "led_7",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) .port = 0x49,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) .mask = BIT(0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static DEFINE_SPINLOCK(value_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * we need to store the current led states, as it is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * possible to read the current led state via inb().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static u8 leds_back;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static u8 leds_front;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static void ot200_led_brightness_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) enum led_brightness value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct ot200_led *led = container_of(led_cdev, struct ot200_led, cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) u8 *val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) spin_lock_irqsave(&value_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (led->port == 0x49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) val = &leds_front;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) else if (led->port == 0x5a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) val = &leds_back;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (value == LED_OFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) *val &= ~led->mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) *val |= led->mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) outb(*val, led->port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) spin_unlock_irqrestore(&value_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static int ot200_led_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) for (i = 0; i < ARRAY_SIZE(leds); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) leds[i].cdev.name = leds[i].name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) leds[i].cdev.brightness_set = ot200_led_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) ret = devm_led_classdev_register(&pdev->dev, &leds[i].cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return ret;
^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) leds_front = 0; /* turn off all front leds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) leds_back = BIT(1); /* turn on init led */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) outb(leds_front, 0x49);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) outb(leds_back, 0x5a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static struct platform_driver ot200_led_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) .probe = ot200_led_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .name = "leds-ot200",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) module_platform_driver(ot200_led_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) MODULE_AUTHOR("Sebastian A. Siewior <bigeasy@linutronix.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) MODULE_DESCRIPTION("ot200 LED driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) MODULE_ALIAS("platform:leds-ot200");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags