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Traditionally, any System-on-Chip based platform creates a flat list of platform_devices directly under /sys/devices/platform. In order to give these some better structure, this introduces a new bus type for soc_devices that are registered with the new soc_device_register() function. All devices that are on the same chip should then be registered as child devices of the soc device. The soc bus also exports a few standardised device attributes which allow user space to query the specific type of soc. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
38 lines
952 B
C
38 lines
952 B
C
/*
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* Copyright (C) ST-Ericsson SA 2011
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* Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson.
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* License terms: GNU General Public License (GPL), version 2
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*/
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#ifndef __SOC_BUS_H
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#define __SOC_BUS_H
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#include <linux/device.h>
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struct soc_device_attribute {
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const char *machine;
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const char *family;
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const char *revision;
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const char *soc_id;
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};
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/**
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* soc_device_register - register SoC as a device
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* @soc_plat_dev_attr: Attributes passed from platform to be attributed to a SoC
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*/
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struct soc_device *soc_device_register(
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struct soc_device_attribute *soc_plat_dev_attr);
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/**
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* soc_device_unregister - unregister SoC device
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* @dev: SoC device to be unregistered
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*/
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void soc_device_unregister(struct soc_device *soc_dev);
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/**
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* soc_device_to_device - helper function to fetch struct device
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* @soc: Previously registered SoC device container
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*/
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struct device *soc_device_to_device(struct soc_device *soc);
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#endif /* __SOC_BUS_H */
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