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stm32mp1: cosmetic: add comment on psci_migrate_info_type return value

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Add explaination for the return value of psci_migrate_info_type:
  2 = Trusted OS.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Patrick Delaunay 2019-02-27 17:01:16 +01:00
parent 45ccdb6fc7
commit b496eec65d
1 changed files with 7 additions and 1 deletions
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8
arch/arm/mach-stm32mp/psci.c
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@ -103,7 +103,13 @@ int __secure psci_affinity_info(u32 function_id, u32 target_affinity,
int __secure psci_migrate_info_type(u32 function_id) int __secure psci_migrate_info_type(u32 function_id)
{ {
/* Trusted OS is either not present or does not require migration */ /*
* in Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf
* return 2 = Trusted OS is either not present or does not require
* migration, system of this type does not require the caller
* to use the MIGRATE function.
* MIGRATE function calls return NOT_SUPPORTED.
*/
return 2; return 2;
} }