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dkim=none (message not signed) header.d=none;dabbelt.com; dmarc=none action=none header.from=wdc.com; Received: from CO6PR04MB7812.namprd04.prod.outlook.com (2603:10b6:303:138::6) by CO6PR04MB7857.namprd04.prod.outlook.com (2603:10b6:5:35f::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4242.19; Fri, 18 Jun 2021 12:39:57 +0000 Received: from CO6PR04MB7812.namprd04.prod.outlook.com ([fe80::a153:b7f8:c87f:89f8]) by CO6PR04MB7812.namprd04.prod.outlook.com ([fe80::a153:b7f8:c87f:89f8%9]) with mapi id 15.20.4242.021; Fri, 18 Jun 2021 12:39:57 +0000 From: Anup Patel To: Palmer Dabbelt , Palmer Dabbelt , Paul Walmsley , Thomas Gleixner , Marc Zyngier , Daniel Lezcano , Rob Herring Cc: Atish Patra , Alistair Francis , Anup Patel , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Anup Patel , Bin Meng Subject: [RFC PATCH v2 09/11] dt-bindings: timer: Add ACLINT MTIMER bindings Date: Fri, 18 Jun 2021 18:08:49 +0530 Message-Id: <20210618123851.1344518-10-anup.patel@wdc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210618123851.1344518-1-anup.patel@wdc.com> References: <20210618123851.1344518-1-anup.patel@wdc.com> X-Originating-IP: [122.171.164.186] X-ClientProxiedBy: MA1PR0101CA0025.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:22::11) To CO6PR04MB7812.namprd04.prod.outlook.com (2603:10b6:303:138::6) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from wdc.com (122.171.164.186) by MA1PR0101CA0025.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:22::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4242.15 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: 500a6c3e-0a3b-40b0-275e-08d932562dfe X-MS-Exchange-CrossTenant-AuthSource: CO6PR04MB7812.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Jun 2021 12:39:57.0828 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: VMfYPaFH8Pg2B8yLlmCDEjX0YsVNNajwKaGFgyP4C9Xjf1ZLEIie9ue5YD4PFnCdRPmy3XnzlFWvVMTIdiyfTQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO6PR04MB7857 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org We add DT bindings documentation for the ACLINT MTIMER device found on RISC-V SOCs. Signed-off-by: Anup Patel Reviewed-by: Bin Meng --- .../bindings/timer/riscv,aclint-mtimer.yaml | 55 +++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/timer/riscv,aclint-mtimer.yaml diff --git a/Documentation/devicetree/bindings/timer/riscv,aclint-mtimer.yaml b/Documentation/devicetree/bindings/timer/riscv,aclint-mtimer.yaml new file mode 100644 index 000000000000..1f467c869d44 --- /dev/null +++ b/Documentation/devicetree/bindings/timer/riscv,aclint-mtimer.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/timer/riscv,aclint-mtimer.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: RISC-V ACLINT M-level Timer + +maintainers: + - Anup Patel + +description: + RISC-V SOCs include an implementation of the M-level timer (MTIMER) defined + in the RISC-V Advanced Core Local Interruptor (ACLINT) specification. The + ACLINT MTIMER device is documented in the RISC-V ACLINT specification found + at https://github.com/riscv/riscv-aclint/blob/main/riscv-aclint.adoc. + + The ACLINT MTIMER device directly connects to the M-level timer interrupt + lines of various HARTs (or CPUs) so the RISC-V per-HART (or per-CPU) local + interrupt controller is the parent interrupt controller for the ACLINT + MTIMER device. + + The clock frequency of ACLINT is specified via "timebase-frequency" DT + property of "/cpus" DT node. The "timebase-frequency" DT property is + described in Documentation/devicetree/bindings/riscv/cpus.yaml + +properties: + compatible: + items: + - const: riscv,aclint-mtimer + + description: + Should be ",-aclint-mtimer" and "riscv,aclint-mtimer". + + reg: + maxItems: 1 + + interrupts-extended: + minItems: 1 + +additionalProperties: false + +required: + - compatible + - reg + - interrupts-extended + +examples: + - | + timer@2004000 { + compatible = "riscv,aclint-mtimer"; + interrupts-extended = <&cpu1intc 7 &cpu2intc 7 &cpu3intc 7 &cpu4intc 7>; + reg = <0x2004000 0x8000>; + }; +...