ACPI: simplify acpi_pci_irq_add_prt() API
[linux-2.6/linux-acpi-2.6.git] / include / linux / i2c-gpio.h
blobc1bcb1f1d73b5b04ac39def6625e55c570b2bda7
1 /*
2 * i2c-gpio interface to platform code
4 * Copyright (C) 2007 Atmel Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10 #ifndef _LINUX_I2C_GPIO_H
11 #define _LINUX_I2C_GPIO_H
13 /**
14 * struct i2c_gpio_platform_data - Platform-dependent data for i2c-gpio
15 * @sda_pin: GPIO pin ID to use for SDA
16 * @scl_pin: GPIO pin ID to use for SCL
17 * @udelay: signal toggle delay. SCL frequency is (500 / udelay) kHz
18 * @timeout: clock stretching timeout in jiffies. If the slave keeps
19 * SCL low for longer than this, the transfer will time out.
20 * @sda_is_open_drain: SDA is configured as open drain, i.e. the pin
21 * isn't actively driven high when setting the output value high.
22 * gpio_get_value() must return the actual pin state even if the
23 * pin is configured as an output.
24 * @scl_is_open_drain: SCL is set up as open drain. Same requirements
25 * as for sda_is_open_drain apply.
26 * @scl_is_output_only: SCL output drivers cannot be turned off.
28 struct i2c_gpio_platform_data {
29 unsigned int sda_pin;
30 unsigned int scl_pin;
31 int udelay;
32 int timeout;
33 unsigned int sda_is_open_drain:1;
34 unsigned int scl_is_open_drain:1;
35 unsigned int scl_is_output_only:1;
38 #endif /* _LINUX_I2C_GPIO_H */