be48308a24
The generic GPIO extcon driver (an external connector device based on GPIO control) and imported from Android kernel. switch: switch class and GPIO drivers. (splitted) Author: Mike Lockwood <lockwood@android.com> switch: gpio: Don't call request_irq with interrupts disabled Author: Arve Hjønnevåg <arve@android.com> switch_gpio: Add missing #include <linux/interrupt.h> Author: Mike Lockwood <lockwood@android.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> -- Changed from v7: - Style updates mentioned by Stephen Boyd and Mark Brown Changed from v5: - Splitted at v5 from the main extcon patch. - Added debounce time for irq handlers. - Use request_any_context_irq instead of request_irq - User needs to specify irq flags for GPIO interrupts (was fixed to IRQF_TRIGGER_LOW before) - Use module_platform_driver(). Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
/*
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* External connector (extcon) class generic GPIO driver
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*
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* Copyright (C) 2012 Samsung Electronics
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* Author: MyungJoo Ham <myungjoo.ham@samsung.com>
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*
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* based on switch class driver
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* Copyright (C) 2008 Google, Inc.
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* Author: Mike Lockwood <lockwood@android.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef __EXTCON_GPIO_H__
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#define __EXTCON_GPIO_H__ __FILE__
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#include <linux/extcon.h>
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/**
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* struct gpio_extcon_platform_data - A simple GPIO-controlled extcon device.
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* @name The name of this GPIO extcon device.
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* @gpio Corresponding GPIO.
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* @debounce Debounce time for GPIO IRQ in ms.
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* @irq_flags IRQ Flags (e.g., IRQF_TRIGGER_LOW).
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* @state_on print_state is overriden with state_on if attached. If Null,
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* default method of extcon class is used.
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* @state_off print_state is overriden with state_on if dettached. If Null,
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* default method of extcon class is used.
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*
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* Note that in order for state_on or state_off to be valid, both state_on
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* and state_off should be not NULL. If at least one of them is NULL,
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* the print_state is not overriden.
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*/
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struct gpio_extcon_platform_data {
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const char *name;
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unsigned gpio;
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unsigned long debounce;
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unsigned long irq_flags;
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/* if NULL, "0" or "1" will be printed */
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const char *state_on;
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const char *state_off;
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};
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#endif /* __EXTCON_GPIO_H__ */
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