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Diffstat (limited to 'docs/usermanual/chapters')
| -rw-r--r-- | docs/usermanual/chapters/common_use_cases.xml | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/docs/usermanual/chapters/common_use_cases.xml b/docs/usermanual/chapters/common_use_cases.xml index d86d0ca8d1..ef81b95fa9 100644 --- a/docs/usermanual/chapters/common_use_cases.xml +++ b/docs/usermanual/chapters/common_use_cases.xml @@ -94,6 +94,30 @@ SRCDATE = "20061014" </listitem> </itemizedlist></para> + <para>There are also some optional variables that can be defined: + <itemizedlist> + <listitem> + <para><command>SOC_FAMILY</command> describes a family of processors + that all share common features such as kernel versions, + bootloaders, etc. This is used to allow overrides for a whole + set of devices rather than per machine overrides being used. + The use of SOC_FAMILY as an override is currently a distribution + or local setting. + </para> + <para> + NOTE: SOC_FAMILY is different than MACHINE_CLASS in that + MACHINE_CLASS is intended to specify a grouping of devices + that may have different processors but share common features. + For example all OMAP3 devices can be described using the SOC_FAMILY + "omap3" and this value can be used in overrides to prevent + requiring multiple machine specific overrides. MACHINE_CLASS + might be used to describe a class of devices such as a cell + phone in which the processor may be different but the + features such as touchscreen, GPS, modem, etc are the same. + </para> + </listitem> + </itemizedlist></para> + <para>Next the kernel recipe needs to be added if it doesn't already exist. </para> </section> |