From be48308a24c7651bf968b561dbd590edb8166d62 Mon Sep 17 00:00:00 2001 From: MyungJoo Ham Date: Fri, 20 Apr 2012 14:16:23 +0900 Subject: Extcon: support generic GPIO extcon driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 switch: gpio: Don't call request_irq with interrupts disabled Author: Arve Hjønnevåg switch_gpio: Add missing #include Author: Mike Lockwood Signed-off-by: MyungJoo Ham Signed-off-by: Kyungmin Park Reviewed-by: Mark Brown -- 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 --- include/linux/extcon/extcon_gpio.h | 52 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 include/linux/extcon/extcon_gpio.h (limited to 'include/linux/extcon') diff --git a/include/linux/extcon/extcon_gpio.h b/include/linux/extcon/extcon_gpio.h new file mode 100644 index 0000000..a2129b7 --- /dev/null +++ b/include/linux/extcon/extcon_gpio.h @@ -0,0 +1,52 @@ +/* + * External connector (extcon) class generic GPIO driver + * + * Copyright (C) 2012 Samsung Electronics + * Author: MyungJoo Ham + * + * based on switch class driver + * Copyright (C) 2008 Google, Inc. + * Author: Mike Lockwood + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * +*/ +#ifndef __EXTCON_GPIO_H__ +#define __EXTCON_GPIO_H__ __FILE__ + +#include + +/** + * struct gpio_extcon_platform_data - A simple GPIO-controlled extcon device. + * @name The name of this GPIO extcon device. + * @gpio Corresponding GPIO. + * @debounce Debounce time for GPIO IRQ in ms. + * @irq_flags IRQ Flags (e.g., IRQF_TRIGGER_LOW). + * @state_on print_state is overriden with state_on if attached. If Null, + * default method of extcon class is used. + * @state_off print_state is overriden with state_on if dettached. If Null, + * default method of extcon class is used. + * + * Note that in order for state_on or state_off to be valid, both state_on + * and state_off should be not NULL. If at least one of them is NULL, + * the print_state is not overriden. + */ +struct gpio_extcon_platform_data { + const char *name; + unsigned gpio; + unsigned long debounce; + unsigned long irq_flags; + + /* if NULL, "0" or "1" will be printed */ + const char *state_on; + const char *state_off; +}; + +#endif /* __EXTCON_GPIO_H__ */ -- cgit v1.1