linux-kernel - [PATCH v2 5/5] dt-bindings: Update the isa string description

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Date:   Tue, 30 Jul 2019 18:24:18 -0700
From:   Atish Patra <atish.patra@....com>
To:     linux-kernel@...r.kernel.org
Cc:     Atish Patra <atish.patra@....com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Alexios Zavras <alexios.zavras@...el.com>,
        Allison Randal <allison@...utok.net>,
        Anup Patel <anup.patel@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        devicetree@...r.kernel.org, Enrico Weigelt <info@...ux.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Johan Hovold <johan@...nel.org>,
        linux-riscv@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Rob Herring <robh+dt@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH v2 5/5] dt-bindings: Update the isa string description

The yaml documentation description of isa strings section doesn't
specify anything about the case sensitiveness of the isa strings.
The RISC-V specification clearly specifies it to be case insensitive.
However, Linux kernel supports only lower case isa strings.

Update the yaml documentation accordingly to avoid any confusion.

Signed-off-by: Atish Patra <atish.patra@....com>
---
 Documentation/devicetree/bindings/riscv/cpus.yaml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index c899111aa5e3..e22a2b7ebafa 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -46,10 +46,14 @@ properties:
           - rv64imafdc
     description:
       Identifies the specific RISC-V instruction set architecture
-      supported by the hart.  These are documented in the RISC-V
+      supported by the hart. These are documented in the RISC-V
       User-Level ISA document, available from
       https://riscv.org/specifications/
 
+      Linux kernel only supports lower case isa strings. Thus,
+      isa strings must be specified in lower case in device tree
+      as well.
+
   timebase-frequency:
     type: integer
     minimum: 1
-- 
2.21.0