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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-19 22:15:33 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-19 22:15:33 +0300
commita84d2d2906f983fb80f5dcc3e8e7c3ad70aa9f0d (patch)
tree26d5ca2e6f2e799d858a18bccaa7c3f42f7d3fe3 /Documentation
parentb5d72dda8976e878be47415b94bca8465d1fa22d (diff)
parentbdfeb0ccea1a12b58299b95eb0f28e2aa26de4c2 (diff)
downloadlinux-a84d2d2906f983fb80f5dcc3e8e7c3ad70aa9f0d.tar.xz
Merge tag 'csky-for-linus-5.3-rc1' of git://github.com/c-sky/csky-linux
Pull arch/csky pupdates from Guo Ren: "This round of csky subsystem gives two features (ASID algorithm update, Perf pmu record support) and some fixups. ASID updates: - Revert mmu ASID mechanism - Add new asid lib code from arm - Use generic asid algorithm to implement switch_mm - Improve tlb operation with help of asid Perf pmu record support: - Init pmu as a device - Add count-width property for csky pmu - Add pmu interrupt support - Fix perf record in kernel/user space - dt-bindings: Add csky PMU bindings Fixes: - Fixup no panic in kernel for some traps - Fixup some error count in 810 & 860. - Fixup abiv1 memset error" * tag 'csky-for-linus-5.3-rc1' of git://github.com/c-sky/csky-linux: csky: Fixup abiv1 memset error csky: Improve tlb operation with help of asid csky: Use generic asid algorithm to implement switch_mm csky: Add new asid lib code from arm csky: Revert mmu ASID mechanism dt-bindings: csky: Add csky PMU bindings dt-bindings: interrupt-controller: Update csky mpintc csky: Fixup some error count in 810 & 860. csky: Fix perf record in kernel/user space csky: Add pmu interrupt support csky: Add count-width property for csky pmu csky: Init pmu as a device csky: Fixup no panic in kernel for some traps csky: Select intc & timer drivers
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/csky/pmu.txt38
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+===============================
+C-SKY Performance Monitor Units
+===============================
+
+C-SKY Performance Monitor is designed for ck807/ck810/ck860 SMP soc and
+it could count cpu's events for helping analysis performance issues.
+
+============================
+PMU node bindings definition
+============================
+
+ Description: Describes PMU
+
+ PROPERTIES
+
+ - compatible
+ Usage: required
+ Value type: <string>
+ Definition: must be "csky,csky-pmu"
+ - interrupts
+ Usage: required
+ Value type: <u32 IRQ_TYPE_XXX>
+ Definition: must be pmu irq num defined by soc
+ - count-width
+ Usage: optional
+ Value type: <u32>
+ Definition: the width of pmu counter
+
+Examples:
+---------
+#include <dt-bindings/interrupt-controller/irq.h>
+
+ pmu: performace-monitor {
+ compatible = "csky,csky-pmu";
+ interrupts = <23 IRQ_TYPE_EDGE_RISING>;
+ interrupt-parent = <&intc>;
+ count-width = <48>;
+ };