1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2# Copyright (C) 2020 BAIKAL ELECTRONICS, JSC 3%YAML 1.2 4--- 5$id: http://devicetree.org/schemas/cache/baikal,bt1-l2-ctl.yaml# 6$schema: http://devicetree.org/meta-schemas/core.yaml# 7 8title: Baikal-T1 L2-cache Control Block 9 10maintainers: 11 - Serge Semin <fancer.lancer@gmail.com> 12 13description: | 14 By means of the System Controller Baikal-T1 SoC exposes a few settings to 15 tune the MIPS P5600 CM2 L2 cache performance up. In particular it's possible 16 to change the Tag, Data and Way-select RAM access latencies. Baikal-T1 17 L2-cache controller block is responsible for the tuning. Its DT node is 18 supposed to be a child of the system controller. 19 20properties: 21 compatible: 22 const: baikal,bt1-l2-ctl 23 24 reg: 25 maxItems: 1 26 27 baikal,l2-ws-latency: 28 $ref: /schemas/types.yaml#/definitions/uint32 29 description: Cycles of latency for Way-select RAM accesses 30 default: 0 31 minimum: 0 32 maximum: 3 33 34 baikal,l2-tag-latency: 35 $ref: /schemas/types.yaml#/definitions/uint32 36 description: Cycles of latency for Tag RAM accesses 37 default: 0 38 minimum: 0 39 maximum: 3 40 41 baikal,l2-data-latency: 42 $ref: /schemas/types.yaml#/definitions/uint32 43 description: Cycles of latency for Data RAM accesses 44 default: 1 45 minimum: 0 46 maximum: 3 47 48additionalProperties: false 49 50required: 51 - compatible 52 53examples: 54 - | 55 l2@1f04d028 { 56 compatible = "baikal,bt1-l2-ctl"; 57 reg = <0x1f04d028 0x004>; 58 59 baikal,l2-ws-latency = <1>; 60 baikal,l2-tag-latency = <1>; 61 baikal,l2-data-latency = <2>; 62 }; 63... 64