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956eb2043a
Add the yellow "lime" LED. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Michael Rolnik <mrolnik@gmail.com> Message-Id: <20210313165445.2113938-2-f4bug@amsat.org>
99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/*
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* QEMU single LED device
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*
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* Copyright (C) 2020 Philippe Mathieu-Daudé <f4bug@amsat.org>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef HW_MISC_LED_H
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#define HW_MISC_LED_H
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#include "qom/object.h"
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#include "hw/qdev-core.h"
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#define TYPE_LED "led"
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/**
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* LEDColor: Color of a LED
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*
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* This set is restricted to physically available LED colors.
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*
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* LED colors from 'Table 1. Product performance of LUXEON Rebel Color
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* Line' of the 'DS68 LUXEON Rebel Color Line' datasheet available at:
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* https://www.lumileds.com/products/color-leds/luxeon-rebel-color/
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*/
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typedef enum { /* Coarse wavelength range */
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LED_COLOR_VIOLET, /* 425 nm */
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LED_COLOR_BLUE, /* 475 nm */
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LED_COLOR_CYAN, /* 500 nm */
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LED_COLOR_GREEN, /* 535 nm */
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LED_COLOR_YELLOW, /* 567 nm */
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LED_COLOR_AMBER, /* 590 nm */
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LED_COLOR_ORANGE, /* 615 nm */
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LED_COLOR_RED, /* 630 nm */
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} LEDColor;
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struct LEDState {
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/* Private */
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DeviceState parent_obj;
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/* Public */
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uint8_t intensity_percent;
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qemu_irq irq;
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/* Properties */
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char *description;
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char *color;
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/*
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* Determines whether a GPIO is using a positive (active-high)
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* logic (when used with GPIO, the intensity at reset is related
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* to the GPIO polarity).
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*/
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bool gpio_active_high;
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};
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typedef struct LEDState LEDState;
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DECLARE_INSTANCE_CHECKER(LEDState, LED, TYPE_LED)
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/**
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* led_set_intensity: Set the intensity of a LED device
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* @s: the LED object
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* @intensity_percent: intensity as percentage in range 0 to 100.
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*/
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void led_set_intensity(LEDState *s, unsigned intensity_percent);
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/**
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* led_get_intensity:
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* @s: the LED object
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*
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* Returns: The LED intensity as percentage in range 0 to 100.
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*/
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unsigned led_get_intensity(LEDState *s);
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/**
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* led_set_state: Set the state of a LED device
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* @s: the LED object
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* @is_emitting: boolean indicating whether the LED is emitting
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*
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* This utility is meant for LED connected to GPIO.
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*/
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void led_set_state(LEDState *s, bool is_emitting);
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/**
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* led_create_simple: Create and realize a LED device
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* @parentobj: the parent object
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* @gpio_polarity: GPIO polarity
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* @color: color of the LED
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* @description: description of the LED (optional)
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*
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* Create the device state structure, initialize it, and
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* drop the reference to it (the device is realized).
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*
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* Returns: The newly allocated and instantiated LED object.
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*/
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LEDState *led_create_simple(Object *parentobj,
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GpioPolarity gpio_polarity,
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LEDColor color,
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const char *description);
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#endif /* HW_MISC_LED_H */
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