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The of_find_i2c_device_by_node function allows you to follow a reference in the device tree to an i2c device node and then locate the linux device instantiated by the device tree. Example use: an I2S bus driver finding the i2c_device instance for a codec described by a device tree node. This was waiting for Anton's i2c patches that were just added. Signed-off-by: Jon Smirl <jonsmirl@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
24 lines
716 B
C
24 lines
716 B
C
/*
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* Generic I2C API implementation for PowerPC.
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*
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* Copyright (c) 2008 Jochen Friedrich <jochen@scram.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __LINUX_OF_I2C_H
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#define __LINUX_OF_I2C_H
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#include <linux/i2c.h>
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void of_register_i2c_devices(struct i2c_adapter *adap,
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struct device_node *adap_node);
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/* must call put_device() when done with returned i2c_client device */
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struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
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#endif /* __LINUX_OF_I2C_H */
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