| Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Haavard Skinnemoen | 1c23af9 | 2007-05-01 23:26:34 +0200 | [diff] [blame] | 2 | /* |
| 3 | * i2c-gpio interface to platform code |
| 4 | * |
| 5 | * Copyright (C) 2007 Atmel Corporation |
| Haavard Skinnemoen | 1c23af9 | 2007-05-01 23:26:34 +0200 | [diff] [blame] | 6 | */ |
| 7 | #ifndef _LINUX_I2C_GPIO_H |
| 8 | #define _LINUX_I2C_GPIO_H |
| 9 | |
| 10 | /** |
| 11 | * struct i2c_gpio_platform_data - Platform-dependent data for i2c-gpio |
| Haavard Skinnemoen | 1c23af9 | 2007-05-01 23:26:34 +0200 | [diff] [blame] | 12 | * @udelay: signal toggle delay. SCL frequency is (500 / udelay) kHz |
| 13 | * @timeout: clock stretching timeout in jiffies. If the slave keeps |
| 14 | * SCL low for longer than this, the transfer will time out. |
| 15 | * @sda_is_open_drain: SDA is configured as open drain, i.e. the pin |
| 16 | * isn't actively driven high when setting the output value high. |
| 17 | * gpio_get_value() must return the actual pin state even if the |
| 18 | * pin is configured as an output. |
| 19 | * @scl_is_open_drain: SCL is set up as open drain. Same requirements |
| 20 | * as for sda_is_open_drain apply. |
| 21 | * @scl_is_output_only: SCL output drivers cannot be turned off. |
| 22 | */ |
| 23 | struct i2c_gpio_platform_data { |
| Haavard Skinnemoen | 1c23af9 | 2007-05-01 23:26:34 +0200 | [diff] [blame] | 24 | int udelay; |
| 25 | int timeout; |
| 26 | unsigned int sda_is_open_drain:1; |
| 27 | unsigned int scl_is_open_drain:1; |
| 28 | unsigned int scl_is_output_only:1; |
| 29 | }; |
| 30 | |
| 31 | #endif /* _LINUX_I2C_GPIO_H */ |