diff options
| author | Lee Jones <lee.jones@linaro.org> | 2017-02-20 23:13:58 +0530 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2017-03-31 10:24:52 +0200 |
| commit | 03b103d45f148f8d254bba76befbe49c5b0311e1 (patch) | |
| tree | 430de7de4a284931b8e3c984ea493f3c2c39a443 /include | |
| parent | 943dd8a82f13c2e31a7f243bb15ae64edf45b7fa (diff) | |
drivers/base: add bus for System-on-Chip devices
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>
(cherry picked from commit 74d1d82cdaaec727f5072eb1c9f49b7e920e076f)
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sys_soc.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/include/linux/sys_soc.h b/include/linux/sys_soc.h new file mode 100644 index 000000000000..2739ccb69571 --- /dev/null +++ b/include/linux/sys_soc.h @@ -0,0 +1,37 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson. + * License terms: GNU General Public License (GPL), version 2 + */ +#ifndef __SOC_BUS_H +#define __SOC_BUS_H + +#include <linux/device.h> + +struct soc_device_attribute { + const char *machine; + const char *family; + const char *revision; + const char *soc_id; +}; + +/** + * soc_device_register - register SoC as a device + * @soc_plat_dev_attr: Attributes passed from platform to be attributed to a SoC + */ +struct soc_device *soc_device_register( + struct soc_device_attribute *soc_plat_dev_attr); + +/** + * soc_device_unregister - unregister SoC device + * @dev: SoC device to be unregistered + */ +void soc_device_unregister(struct soc_device *soc_dev); + +/** + * soc_device_to_device - helper function to fetch struct device + * @soc: Previously registered SoC device container + */ +struct device *soc_device_to_device(struct soc_device *soc); + +#endif /* __SOC_BUS_H */ |