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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/porting-guide.md | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/docs/porting-guide.md b/docs/porting-guide.md index 56ddbb1c..004f70d6 100644 --- a/docs/porting-guide.md +++ b/docs/porting-guide.md @@ -476,6 +476,18 @@ memory layout implies some image overlaying like in ARM standard platforms. Defines the maximum address that the TSP's progbits sections can occupy. +If the platform port uses the PL061 GPIO driver, the following constant may +optionally be defined: + +* **PLAT_PL061_MAX_GPIOS** + Maximum number of GPIOs required by the platform. This allows control how + much memory is allocated for PL061 GPIO controllers. The default value is + 32. + [For example, define the build flag in platform.mk]: + PLAT_PL061_MAX_GPIOS := 160 + $(eval $(call add_define,PLAT_PL061_MAX_GPIOS)) + + ### File : plat_macros.S [mandatory] Each platform must ensure a file of this name is in the system include path with |