| Haavard Skinnemoen | 1c23af9 | 2007-05-01 23:26:34 +0200 | [diff] [blame] | 1 | /* |
| 2 | * i2c-gpio interface to platform code |
| 3 | * |
| 4 | * Copyright (C) 2007 Atmel Corporation |
| 5 | * |
| 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 |
| 12 | |
| 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. |
| 27 | */ |
| 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; |
| 36 | }; |
| 37 | |
| 38 | #endif /* _LINUX_I2C_GPIO_H */ |