Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / extcon / extcon-gpio.h

diff --git a/kernel/include/linux/extcon/extcon-gpio.h b/kernel/include/linux/extcon/extcon-gpio.h
new file mode 100644 (file)
index 0000000..0b17ad4
--- /dev/null
+++ b/kernel/include/linux/extcon/extcon-gpio.h
@@ -0,0 +1,59 @@
+/*
+ *  External connector (extcon) class generic GPIO driver
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * Author: MyungJoo Ham <myungjoo.ham@samsung.com>
+ *
+ * based on switch class driver
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * 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 <linux/extcon.h>
+
+/**
+ * struct gpio_extcon_platform_data - A simple GPIO-controlled extcon device.
+ * @name:              The name of this GPIO extcon device.
+ * @gpio:              Corresponding GPIO.
+ * @gpio_active_low:   Boolean describing whether gpio active state is 1 or 0
+ *                     If true, low state of gpio means active.
+ *                     If false, high state of gpio means active.
+ * @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_off if detached.
+ *                     If NUll, default method of extcon class is used.
+ * @check_on_resume:   Boolean describing whether to check the state of gpio
+ *                     while resuming from sleep.
+ *
+ * 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;
+       bool gpio_active_low;
+       unsigned long debounce;
+       unsigned long irq_flags;
+
+       /* if NULL, "0" or "1" will be printed */
+       const char *state_on;
+       const char *state_off;
+       bool check_on_resume;
+};
+
+#endif /* __EXTCON_GPIO_H__ */