3192f14124
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230714174651.4058753-1-robh@kernel.org Signed-off-by: Lee Jones <lee@kernel.org>
134 lines
3.0 KiB
C
134 lines
3.0 KiB
C
// SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0-or-later
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/*
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* Dell Wyse 3020 a.k.a. "Ariel" Embedded Controller LED Driver
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*
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* Copyright (C) 2020 Lubomir Rintel
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*/
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#include <linux/module.h>
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#include <linux/leds.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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enum ec_index {
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EC_BLUE_LED = 0x01,
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EC_AMBER_LED = 0x02,
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EC_GREEN_LED = 0x03,
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};
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enum {
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EC_LED_OFF = 0x00,
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EC_LED_STILL = 0x01,
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EC_LED_FADE = 0x02,
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EC_LED_BLINK = 0x03,
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};
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struct ariel_led {
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struct regmap *ec_ram;
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enum ec_index ec_index;
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struct led_classdev led_cdev;
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};
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#define led_cdev_to_ariel_led(c) container_of(c, struct ariel_led, led_cdev)
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static enum led_brightness ariel_led_get(struct led_classdev *led_cdev)
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{
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struct ariel_led *led = led_cdev_to_ariel_led(led_cdev);
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unsigned int led_status = 0;
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if (regmap_read(led->ec_ram, led->ec_index, &led_status))
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return LED_OFF;
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if (led_status == EC_LED_STILL)
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return LED_FULL;
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else
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return LED_OFF;
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}
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static void ariel_led_set(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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struct ariel_led *led = led_cdev_to_ariel_led(led_cdev);
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if (brightness == LED_OFF)
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regmap_write(led->ec_ram, led->ec_index, EC_LED_OFF);
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else
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regmap_write(led->ec_ram, led->ec_index, EC_LED_STILL);
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}
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static int ariel_blink_set(struct led_classdev *led_cdev,
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unsigned long *delay_on, unsigned long *delay_off)
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{
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struct ariel_led *led = led_cdev_to_ariel_led(led_cdev);
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if (*delay_on == 0 && *delay_off == 0)
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return -EINVAL;
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if (*delay_on == 0) {
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regmap_write(led->ec_ram, led->ec_index, EC_LED_OFF);
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} else if (*delay_off == 0) {
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regmap_write(led->ec_ram, led->ec_index, EC_LED_STILL);
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} else {
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*delay_on = 500;
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*delay_off = 500;
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regmap_write(led->ec_ram, led->ec_index, EC_LED_BLINK);
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}
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return 0;
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}
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#define NLEDS 3
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static int ariel_led_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct ariel_led *leds;
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struct regmap *ec_ram;
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int ret;
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int i;
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ec_ram = dev_get_regmap(dev->parent, "ec_ram");
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if (!ec_ram)
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return -ENODEV;
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leds = devm_kcalloc(dev, NLEDS, sizeof(*leds), GFP_KERNEL);
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if (!leds)
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return -ENOMEM;
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leds[0].ec_index = EC_BLUE_LED;
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leds[0].led_cdev.name = "blue:power";
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leds[0].led_cdev.default_trigger = "default-on";
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leds[1].ec_index = EC_AMBER_LED;
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leds[1].led_cdev.name = "amber:status";
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leds[2].ec_index = EC_GREEN_LED;
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leds[2].led_cdev.name = "green:status";
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leds[2].led_cdev.default_trigger = "default-on";
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for (i = 0; i < NLEDS; i++) {
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leds[i].ec_ram = ec_ram;
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leds[i].led_cdev.brightness_get = ariel_led_get;
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leds[i].led_cdev.brightness_set = ariel_led_set;
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leds[i].led_cdev.blink_set = ariel_blink_set;
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ret = devm_led_classdev_register(dev, &leds[i].led_cdev);
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if (ret)
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return ret;
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}
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return 0;
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}
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static struct platform_driver ariel_led_driver = {
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.probe = ariel_led_probe,
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.driver = {
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.name = "dell-wyse-ariel-led",
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},
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};
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module_platform_driver(ariel_led_driver);
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MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
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MODULE_DESCRIPTION("Dell Wyse 3020 Status LEDs Driver");
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MODULE_LICENSE("Dual BSD/GPL");
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