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authorLee Jones <lee.jones@linaro.org>2012-02-06 11:22:23 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-02-10 11:42:25 -0800
commitda5a70f3519fd6f73ece3eea261a861c9a4d6bbd (patch)
tree088f3a935895970e0a928509d8bcce55456f24f0 /Documentation/ABI
parent74d1d82cdaaec727f5072eb1c9f49b7e920e076f (diff)
Documentation: add information for new sysfs soc bus functionality
This change applies the required documentation for each new attribute recenty added by the new System-On-Chip (SoC) information export bus driver. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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+What: /sys/devices/socX
+Date: January 2012
+contact: Lee Jones <lee.jones@linaro.org>
+Description:
+ The /sys/devices/ directory contains a sub-directory for each
+ System-on-Chip (SoC) device on a running platform. Information
+ regarding each SoC can be obtained by reading sysfs files. This
+ functionality is only available if implemented by the platform.
+
+ The directory created for each SoC will also house information
+ about devices which are commonly contained in /sys/devices/platform.
+ It has been agreed that if an SoC device exists, its supported
+ devices would be better suited to appear as children of that SoC.
+
+What: /sys/devices/socX/machine
+Date: January 2012
+contact: Lee Jones <lee.jones@linaro.org>
+Description:
+ Read-only attribute common to all SoCs. Contains the SoC machine
+ name (e.g. Ux500).
+
+What: /sys/devices/socX/family
+Date: January 2012
+contact: Lee Jones <lee.jones@linaro.org>
+Description:
+ Read-only attribute common to all SoCs. Contains SoC family name
+ (e.g. DB8500).
+
+What: /sys/devices/socX/soc_id
+Date: January 2012
+contact: Lee Jones <lee.jones@linaro.org>
+Description:
+ Read-only attribute supported by most SoCs. In the case of
+ ST-Ericsson's chips this contains the SoC serial number.
+
+What: /sys/devices/socX/revision
+Date: January 2012
+contact: Lee Jones <lee.jones@linaro.org>
+Description:
+ Read-only attribute supported by most SoCs. Contains the SoC's
+ manufacturing revision number.
+
+What: /sys/devices/socX/process
+Date: January 2012
+contact: Lee Jones <lee.jones@linaro.org>
+Description:
+ Read-only attribute supported ST-Ericsson's silicon. Contains the
+ the process by which the silicon chip was manufactured.
+
+What: /sys/bus/soc
+Date: January 2012
+contact: Lee Jones <lee.jones@linaro.org>
+Description:
+ The /sys/bus/soc/ directory contains the usual sub-folders
+ expected under most buses. /sys/bus/soc/devices is of particular
+ interest, as it contains a symlink for each SoC device found on
+ the system. Each symlink points back into the aforementioned
+ /sys/devices/socX devices.