Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / i2c-gpio.h

diff --git a/kernel/include/linux/i2c-gpio.h b/kernel/include/linux/i2c-gpio.h
new file mode 100644 (file)
index 0000000..c1bcb1f
--- /dev/null
+++ b/kernel/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 */