^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: BSD-2-Clause OR 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 Wyse 3020 a.k.a. "Ariel" Embedded Controller LED Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2020 Lubomir Rintel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) enum ec_index {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) EC_BLUE_LED = 0x01,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) EC_AMBER_LED = 0x02,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) EC_GREEN_LED = 0x03,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) EC_LED_OFF = 0x00,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) EC_LED_STILL = 0x01,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) EC_LED_FADE = 0x02,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) EC_LED_BLINK = 0x03,
^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) struct ariel_led {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct regmap *ec_ram;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) enum ec_index ec_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct led_classdev led_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define led_cdev_to_ariel_led(c) container_of(c, struct ariel_led, led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static enum led_brightness ariel_led_get(struct led_classdev *led_cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct ariel_led *led = led_cdev_to_ariel_led(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) unsigned int led_status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (regmap_read(led->ec_ram, led->ec_index, &led_status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return LED_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (led_status == EC_LED_STILL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return LED_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return LED_OFF;
^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) static void ariel_led_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) enum led_brightness brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct ariel_led *led = led_cdev_to_ariel_led(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (brightness == LED_OFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) regmap_write(led->ec_ram, led->ec_index, EC_LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) regmap_write(led->ec_ram, led->ec_index, EC_LED_STILL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static int ariel_blink_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) unsigned long *delay_on, unsigned long *delay_off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct ariel_led *led = led_cdev_to_ariel_led(led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (*delay_on == 0 && *delay_off == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (*delay_on == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) regmap_write(led->ec_ram, led->ec_index, EC_LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) } else if (*delay_off == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) regmap_write(led->ec_ram, led->ec_index, EC_LED_STILL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) *delay_on = 500;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) *delay_off = 500;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) regmap_write(led->ec_ram, led->ec_index, EC_LED_BLINK);
^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) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #define NLEDS 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static int ariel_led_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct ariel_led *leds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct regmap *ec_ram;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) ec_ram = dev_get_regmap(dev->parent, "ec_ram");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (!ec_ram)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) leds = devm_kcalloc(dev, NLEDS, sizeof(*leds), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (!leds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) leds[0].ec_index = EC_BLUE_LED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) leds[0].led_cdev.name = "blue:power",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) leds[0].led_cdev.default_trigger = "default-on";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) leds[1].ec_index = EC_AMBER_LED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) leds[1].led_cdev.name = "amber:status",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) leds[2].ec_index = EC_GREEN_LED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) leds[2].led_cdev.name = "green:status",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) leds[2].led_cdev.default_trigger = "default-on";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) for (i = 0; i < NLEDS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) leds[i].ec_ram = ec_ram;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) leds[i].led_cdev.brightness_get = ariel_led_get;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) leds[i].led_cdev.brightness_set = ariel_led_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) leds[i].led_cdev.blink_set = ariel_blink_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) ret = devm_led_classdev_register(dev, &leds[i].led_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^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 struct platform_driver ariel_led_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .probe = ariel_led_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .name = "dell-wyse-ariel-led",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) module_platform_driver(ariel_led_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) MODULE_DESCRIPTION("Dell Wyse 3020 Status LEDs Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) MODULE_LICENSE("Dual BSD/GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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