projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| da5a70f3 LJ |
1 | What: /sys/devices/socX |
| 2 | Date: January 2012 | |
| 3 | contact: Lee Jones <lee.jones@linaro.org> | |
| 4 | Description: | |
| 5 | The /sys/devices/ directory contains a sub-directory for each | |
| 6 | System-on-Chip (SoC) device on a running platform. Information | |
| 7 | regarding each SoC can be obtained by reading sysfs files. This | |
| 8 | functionality is only available if implemented by the platform. | |
| 9 | ||
| 10 | The directory created for each SoC will also house information | |
| 11 | about devices which are commonly contained in /sys/devices/platform. | |
| 12 | It has been agreed that if an SoC device exists, its supported | |
| 13 | devices would be better suited to appear as children of that SoC. | |
| 14 | ||
| 15 | What: /sys/devices/socX/machine | |
| 16 | Date: January 2012 | |
| 17 | contact: Lee Jones <lee.jones@linaro.org> | |
| 18 | Description: | |
| 19 | Read-only attribute common to all SoCs. Contains the SoC machine | |
| 20 | name (e.g. Ux500). | |
| 21 | ||
| 22 | What: /sys/devices/socX/family | |
| 23 | Date: January 2012 | |
| 24 | contact: Lee Jones <lee.jones@linaro.org> | |
| 25 | Description: | |
| 26 | Read-only attribute common to all SoCs. Contains SoC family name | |
| 27 | (e.g. DB8500). | |
| 28 | ||
| 29 | What: /sys/devices/socX/soc_id | |
| 30 | Date: January 2012 | |
| 31 | contact: Lee Jones <lee.jones@linaro.org> | |
| 32 | Description: | |
| 33 | Read-only attribute supported by most SoCs. In the case of | |
| 34 | ST-Ericsson's chips this contains the SoC serial number. | |
| 35 | ||
| 36 | What: /sys/devices/socX/revision | |
| 37 | Date: January 2012 | |
| 38 | contact: Lee Jones <lee.jones@linaro.org> | |
| 39 | Description: | |
| 40 | Read-only attribute supported by most SoCs. Contains the SoC's | |
| 41 | manufacturing revision number. | |
| 42 | ||
| 43 | What: /sys/devices/socX/process | |
| 44 | Date: January 2012 | |
| 45 | contact: Lee Jones <lee.jones@linaro.org> | |
| 46 | Description: | |
| 47 | Read-only attribute supported ST-Ericsson's silicon. Contains the | |
| 48 | the process by which the silicon chip was manufactured. | |
| 49 | ||
| 50 | What: /sys/bus/soc | |
| 51 | Date: January 2012 | |
| 52 | contact: Lee Jones <lee.jones@linaro.org> | |
| 53 | Description: | |
| 54 | The /sys/bus/soc/ directory contains the usual sub-folders | |
| 55 | expected under most buses. /sys/bus/soc/devices is of particular | |
| 56 | interest, as it contains a symlink for each SoC device found on | |
| 57 | the system. Each symlink points back into the aforementioned | |
| 58 | /sys/devices/socX devices. |