6bccf755ff
This adds two sysfs attributes to /sys/bus/ibmebus which can be used to notify the ebus driver of added / removed ebus devices in the OF device tree. Echoing the device's location code (as found in the OFDT "ibm,loc-code" property) into the "probe" attribute will notify ebus of addition of the device and cause the appropriate device driver's probe function to be called on the device. Likewise, echoing the location code into the "remove" attribute will cause the device to be removed from the system. The writes will block until the respective operation has finished and return an error code if the operation failed. In addition, two minor tidbits are fixed: - The fake root device used to provide a common parent for all ebus devices is now based on device instead of of_device - it had no associated devtree node. This saves several checks throughout the ebus driver. - The sysfs attributes are now generated automagically by device_register() instead of by the ibmebus code, which saves a few compiler warnings about unused return codes. Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/*
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* IBM PowerPC eBus Infrastructure Support.
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*
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* Copyright (c) 2005 IBM Corporation
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* Joachim Fenkes <fenkes@de.ibm.com>
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* Heiko J Schick <schickhj@de.ibm.com>
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*
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* All rights reserved.
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*
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* This source code is distributed under a dual license of GPL v2.0 and OpenIB
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* BSD.
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*
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* OpenIB BSD License
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ASM_EBUS_H
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#define _ASM_EBUS_H
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#ifdef __KERNEL__
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/mod_devicetable.h>
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#include <asm/of_device.h>
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extern struct bus_type ibmebus_bus_type;
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struct ibmebus_dev {
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struct of_device ofdev;
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};
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struct ibmebus_driver {
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char *name;
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struct of_device_id *id_table;
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int (*probe) (struct ibmebus_dev *dev, const struct of_device_id *id);
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int (*remove) (struct ibmebus_dev *dev);
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struct device_driver driver;
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};
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int ibmebus_register_driver(struct ibmebus_driver *drv);
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void ibmebus_unregister_driver(struct ibmebus_driver *drv);
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int ibmebus_request_irq(struct ibmebus_dev *dev,
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u32 ist,
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irq_handler_t handler,
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unsigned long irq_flags, const char * devname,
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void *dev_id);
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void ibmebus_free_irq(struct ibmebus_dev *dev, u32 ist, void *dev_id);
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static inline struct ibmebus_driver *to_ibmebus_driver(struct device_driver *drv)
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{
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return container_of(drv, struct ibmebus_driver, driver);
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}
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static inline struct ibmebus_dev *to_ibmebus_dev(struct device *dev)
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{
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return container_of(dev, struct ibmebus_dev, ofdev.dev);
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}
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#endif /* __KERNEL__ */
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#endif /* _ASM_IBMEBUS_H */
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