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authorLinus Torvalds <torvalds@linux-foundation.org>2018-11-02 00:45:38 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-11-02 00:45:38 +0300
commit34c7685a177a7bc98066f7e5daa42eef621d0bdb (patch)
tree0f0394724a4c068fd733b4a6a7248d4fe7c79fd1 /Documentation
parentb5b1de3537e2cd8f52971224a1be24bb3ce34a65 (diff)
parentc961cb3be9064d1097ccc019390f8b5739daafc6 (diff)
downloadlinux-34c7685a177a7bc98066f7e5daa42eef621d0bdb.tar.xz
Merge tag 'devicetree-fixes-for-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull Devicetree fixes from Rob Herring: - fix cpu node iterator for powerpc systems - clarify ARM CPU binding 'capacities-dmips-mhz' property calculations * tag 'devicetree-fixes-for-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: of: Fix cpu node iterator to not ignore disabled cpu nodes dt-bindings: arm: Explain capacities-dmips-mhz calculations in example
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/arm/cpu-capacity.txt8
1 files changed, 5 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/arm/cpu-capacity.txt b/Documentation/devicetree/bindings/arm/cpu-capacity.txt
index 9b5685a1d15d..84262cdb8d29 100644
--- a/Documentation/devicetree/bindings/arm/cpu-capacity.txt
+++ b/Documentation/devicetree/bindings/arm/cpu-capacity.txt
@@ -59,9 +59,11 @@ mhz values (normalized w.r.t. the highest value found while parsing the DT).
===========================================
Example 1 (ARM 64-bit, 6-cpu system, two clusters):
-capacities-dmips-mhz are scaled w.r.t. 1024 (cpu@0 and cpu@1)
-supposing cluster0@max-freq=1100 and custer1@max-freq=850,
-final capacities are 1024 for cluster0 and 446 for cluster1
+The capacities-dmips-mhz or DMIPS/MHz values (scaled to 1024)
+are 1024 and 578 for cluster0 and cluster1. Further normalization
+is done by the operating system based on cluster0@max-freq=1100 and
+custer1@max-freq=850, final capacities are 1024 for cluster0 and
+446 for cluster1 (576*850/1100).
cpus {
#address-cells = <2>;