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5054d39e32
LEDs driver for National Semiconductor LP3944 Funlight Chip http://www.national.com/pf/LP/LP3944.html This helper chip can drive up to 8 leds, with two programmable DIM modes; it could even be used as a gpio expander but this driver assumes it is used as a led controller. The DIM modes are used to set _blink_ patterns for leds, the pattern is specified supplying two parameters: - period: from 0s to 1.6s - duty cycle: percentage of the period the led is on, from 0 to 100 LP3944 can be found on Motorola A910 smartphone, where it drives the rgb leds, the camera flash light and the displays backlights. Signed-off-by: Antonio Ospite <ospite@studenti.unina.it> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
/*
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* leds-lp3944.h - platform data structure for lp3944 led controller
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*
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* Copyright (C) 2009 Antonio Ospite <ospite@studenti.unina.it>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#ifndef __LINUX_LEDS_LP3944_H
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#define __LINUX_LEDS_LP3944_H
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#include <linux/leds.h>
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#include <linux/workqueue.h>
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#define LP3944_LED0 0
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#define LP3944_LED1 1
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#define LP3944_LED2 2
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#define LP3944_LED3 3
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#define LP3944_LED4 4
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#define LP3944_LED5 5
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#define LP3944_LED6 6
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#define LP3944_LED7 7
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#define LP3944_LEDS_MAX 8
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#define LP3944_LED_STATUS_MASK 0x03
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enum lp3944_status {
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LP3944_LED_STATUS_OFF = 0x0,
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LP3944_LED_STATUS_ON = 0x1,
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LP3944_LED_STATUS_DIM0 = 0x2,
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LP3944_LED_STATUS_DIM1 = 0x3
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};
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enum lp3944_type {
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LP3944_LED_TYPE_NONE,
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LP3944_LED_TYPE_LED,
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LP3944_LED_TYPE_LED_INVERTED,
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};
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struct lp3944_led {
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char *name;
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enum lp3944_type type;
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enum lp3944_status status;
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};
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struct lp3944_platform_data {
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struct lp3944_led leds[LP3944_LEDS_MAX];
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u8 leds_size;
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};
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#endif /* __LINUX_LEDS_LP3944_H */
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