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author | Paul Mackerras <paulus@samba.org> | 2007-05-08 03:37:51 (GMT) |
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committer | Paul Mackerras <paulus@samba.org> | 2007-05-08 03:37:51 (GMT) |
commit | 02bbc0f09c90cefdb2837605c96a66c5ce4ba2e1 (patch) | |
tree | 04ef573cd4de095c500c9fc3477f4278c0b36300 /include/linux/i2c-gpio.h | |
parent | 7487a2245b8841c77ba9db406cf99a483b9334e9 (diff) | |
parent | 5b94f675f57e4ff16c8fda09088d7480a84dcd91 (diff) | |
download | linux-fsl-qoriq-02bbc0f09c90cefdb2837605c96a66c5ce4ba2e1.tar.xz |
Merge branch '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 0000000..c1bcb1f --- /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 */ |