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author | Dmitry Torokhov | 2007-05-08 07:31:11 +0200 |
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committer | Dmitry Torokhov | 2007-05-08 07:31:11 +0200 |
commit | 334d0dd8b660557608142f0f77abc6812b48f08b (patch) | |
tree | 9393a9aa099d7d42deda5f9f5054796c0c769be7 /include/linux/i2c-gpio.h | |
parent | Input: aaed2000_kbd - convert to use polldev library (diff) | |
parent | Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 (diff) | |
download | kernel-qcow2-linux-334d0dd8b660557608142f0f77abc6812b48f08b.tar.gz kernel-qcow2-linux-334d0dd8b660557608142f0f77abc6812b48f08b.tar.xz kernel-qcow2-linux-334d0dd8b660557608142f0f77abc6812b48f08b.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'include/linux/i2c-gpio.h')
-rw-r--r-- | include/linux/i2c-gpio.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/linux/i2c-gpio.h b/include/linux/i2c-gpio.h new file mode 100644 index 000000000000..c1bcb1f1d73b --- /dev/null +++ b/include/linux/i2c-gpio.h @@ -0,0 +1,38 @@ +/* + * i2c-gpio interface to platform code + * + * Copyright (C) 2007 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _LINUX_I2C_GPIO_H +#define _LINUX_I2C_GPIO_H + +/** + * struct i2c_gpio_platform_data - Platform-dependent data for i2c-gpio + * @sda_pin: GPIO pin ID to use for SDA + * @scl_pin: GPIO pin ID to use for SCL + * @udelay: signal toggle delay. SCL frequency is (500 / udelay) kHz + * @timeout: clock stretching timeout in jiffies. If the slave keeps + * SCL low for longer than this, the transfer will time out. + * @sda_is_open_drain: SDA is configured as open drain, i.e. the pin + * isn't actively driven high when setting the output value high. + * gpio_get_value() must return the actual pin state even if the + * pin is configured as an output. + * @scl_is_open_drain: SCL is set up as open drain. Same requirements + * as for sda_is_open_drain apply. + * @scl_is_output_only: SCL output drivers cannot be turned off. + */ +struct i2c_gpio_platform_data { + unsigned int sda_pin; + unsigned int scl_pin; + int udelay; + int timeout; + unsigned int sda_is_open_drain:1; + unsigned int scl_is_open_drain:1; + unsigned int scl_is_output_only:1; +}; + +#endif /* _LINUX_I2C_GPIO_H */ |