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Diffstat (limited to 'include/linux/platform_data/i2c-hid.h')
| -rw-r--r-- | include/linux/platform_data/i2c-hid.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/include/linux/platform_data/i2c-hid.h b/include/linux/platform_data/i2c-hid.h new file mode 100644 index 000000000000..1fb088239d12 --- /dev/null +++ b/include/linux/platform_data/i2c-hid.h @@ -0,0 +1,42 @@ +/* + * HID over I2C protocol implementation + * + * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com> + * Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + */ + +#ifndef __LINUX_I2C_HID_H +#define __LINUX_I2C_HID_H + +#include <linux/types.h> + +struct regulator; + +/** + * struct i2chid_platform_data - used by hid over i2c implementation. + * @hid_descriptor_address: i2c register where the HID descriptor is stored. + * @supply: regulator for powering on the device. + * @post_power_delay_ms: delay after powering on before device is usable. + * + * Note that it is the responsibility of the platform driver (or the acpi 5.0 + * driver, or the flattened device tree) to setup the irq related to the gpio in + * the struct i2c_board_info. + * The platform driver should also setup the gpio according to the device: + * + * A typical example is the following: + * irq = gpio_to_irq(intr_gpio); + * hkdk4412_i2c_devs5[0].irq = irq; // store the irq in i2c_board_info + * gpio_request(intr_gpio, "elan-irq"); + * s3c_gpio_setpull(intr_gpio, S3C_GPIO_PULL_UP); + */ +struct i2c_hid_platform_data { + u16 hid_descriptor_address; + struct regulator *supply; + int post_power_delay_ms; +}; + +#endif /* __LINUX_I2C_HID_H */ |