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From: Atish Patra <atish.patra@wdc.com>
To: linux-kernel@vger.kernel.org
Cc: Atish Patra <atish.patra@wdc.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Anup Patel <anup.patel@wdc.com>, Ard Biesheuvel <ardb@kernel.org>,
	"Darrick J. Wong" <djwong@kernel.org>,
	devicetree@vger.kernel.org, Guo Ren <guoren@linux.alibaba.com>,
	Heinrich Schuchardt <xypron.glpk@gmx.de>,
	Jiri Olsa <jolsa@redhat.com>, John Garry <john.garry@huawei.com>,
	Jonathan Corbet <corbet@lwn.net>,
	linux-doc@vger.kernel.org, linux-perf-users@vger.kernel.org,
	linux-riscv@lists.infradead.org,
	Nick Kossifidis <mick@ics.forth.gr>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Rob Herring <robh+dt@kernel.org>,
	Vincent Chen <vincent.chen@sifive.com>
Subject: [v3 06/10] dt-binding: pmu: Add RISC-V PMU DT bindings
Date: Fri, 10 Sep 2021 12:27:53 -0700	[thread overview]
Message-ID: <20210910192757.2309100-7-atish.patra@wdc.com> (raw)
In-Reply-To: <20210910192757.2309100-1-atish.patra@wdc.com>

This patch adds the DT bindings for RISC-V PMU driver. It also defines
the interrupt related properties to allow counter overflow interrupt.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
---
 .../devicetree/bindings/perf/riscv,pmu.yaml   | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/perf/riscv,pmu.yaml

diff --git a/Documentation/devicetree/bindings/perf/riscv,pmu.yaml b/Documentation/devicetree/bindings/perf/riscv,pmu.yaml
new file mode 100644
index 000000000000..497caad63f16
--- /dev/null
+++ b/Documentation/devicetree/bindings/perf/riscv,pmu.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pmu/riscv,pmu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RISC-V PMU
+
+maintainers:
+  - Atish Patra <atish.patra@wdc.com>
+
+description:
+  The "Sscofpmf" extension allows the RISC-V PMU counters to overflow and
+  generate a local interrupt so that event sampling can be done from user-space.
+  The above said ISA extension is an optional extension to maintain backward
+  compatibility and will be included in privilege specification v1.12 . That's
+  why the interrupt property is marked as optional. The platforms with sscofpmf
+  extension should add this property to enable event sampling.
+  The device tree node with the compatible string is mandatory for any platform
+  that wants to use pmu counter start/stop methods using SBI PMU extension.
+
+properties:
+  compatible:
+    enum:
+      - riscv,pmu
+
+    description:
+      Should be "riscv,pmu".
+
+  interrupts-extended:
+    minItems: 1
+    maxItems: 4095
+
+additionalProperties: false
+
+required:
+  - None
+optional:
+  - compatible
+  - interrupts-extended
+
+examples:
+  - |
+    pmu {
+      compatible = "riscv,pmu";
+      interrupts-extended = <&cpu0intc 13>,
+                            <&cpu1intc 13>,
+                            <&cpu2intc 13>,
+                            <&cpu3intc 13>;
+    };
+...
-- 
2.31.1


  parent reply	other threads:[~2021-09-10 19:29 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-10 19:27 [v3 00/10] Improve RISC-V Perf support using SBI PMU and sscofpmf extension Atish Patra
2021-09-10 19:27 ` [v3 01/10] RISC-V: Remove the current perf implementation Atish Patra
     [not found]   ` <238571632287002@mail.yandex.ru>
2021-09-22  5:25     ` Nikita Shubin
2021-09-10 19:27 ` [v3 02/10] RISC-V: Add CSR encodings for all HPMCOUNTERS Atish Patra
2021-09-10 19:27 ` [v3 03/10] RISC-V: Add a perf core library for pmu drivers Atish Patra
2021-09-10 19:27 ` [v3 04/10] RISC-V: Add a simple platform driver for RISC-V legacy perf Atish Patra
2021-09-10 19:27 ` [v3 05/10] RISC-V: Add RISC-V SBI PMU extension definitions Atish Patra
2021-09-10 19:27 ` Atish Patra [this message]
2021-09-13 12:18   ` [v3 06/10] dt-binding: pmu: Add RISC-V PMU DT bindings Rob Herring
2021-09-14 15:50   ` Rob Herring
2021-09-10 19:27 ` [v3 07/10] RISC-V: Add perf platform driver based on SBI PMU extension Atish Patra
2021-09-10 19:27 ` [v3 08/10] RISC-V: Add interrupt support for perf Atish Patra
2021-09-10 19:27 ` [v3 09/10] Documentation: riscv: Remove the old documentation Atish Patra
2021-09-10 19:27 ` [v3 10/10] MAINTAINERS: Add entry for RISC-V PMU drivers Atish Patra
2021-10-04 18:20 ` [v3 00/10] Improve RISC-V Perf support using SBI PMU and sscofpmf extension Palmer Dabbelt
2021-10-06 18:27   ` Atish Patra
2021-10-05  9:17 ` Nikita Shubin
2021-10-06 18:28   ` Atish Patra

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