linux-kernel - [PATCH v2 1/4] dt-bindings: Correct RISC-V's timebase-frequency

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Date:   Thu, 13 Dec 2018 15:14:26 -0800
From:   Atish Patra <atish.patra@....com>
To:     linux-kernel@...r.kernel.org
Cc:     Palmer Dabbelt <palmer@...ive.com>, Christoph Hellwig <hch@....de>,
        Atish Patra <atish.patra@....com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        devicetree@...r.kernel.org,
        Dmitriy Cherkasov <dmitriy@...-tech.org>,
        linux-riscv@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Anup Patel <anup@...infault.org>,
        Damien Le Moal <Damien.LeMoal@....com>,
        Christoph Hellwig <hch@...radead.org>
Subject: [PATCH v2 1/4] dt-bindings: Correct RISC-V's timebase-frequency

From: Palmer Dabbelt <palmer@...ive.com>

In RISC-V systems, timebase-frequency is per cpu instead of one
instance for entire SOC as there is a individual timer per each CPU.
Fix the DT binding accordingly.

Signed-off-by: Palmer Dabbelt <palmer@...ive.com>
Signed-off-by: Christoph Hellwig <hch@....de>
[Atish: Update the commit text]
Signed-off-by: Atish Patra <atish.patra@....com>
Reviewed-by: Rob Herring <robh@...nel.org>
---
 Documentation/devicetree/bindings/riscv/cpus.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/riscv/cpus.txt b/Documentation/devicetree/bindings/riscv/cpus.txt
index adf7b7af..b0b038d6 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.txt
+++ b/Documentation/devicetree/bindings/riscv/cpus.txt
@@ -93,9 +93,9 @@ Linux is allowed to run on.
         cpus {
                 #address-cells = <1>;
                 #size-cells = <0>;
-                timebase-frequency = <1000000>;
                 cpu@0 {
                         clock-frequency = <1600000000>;
+                        timebase-frequency = <1000000>;
                         compatible = "sifive,rocket0", "riscv";
                         device_type = "cpu";
                         i-cache-block-size = <64>;
@@ -113,6 +113,7 @@ Linux is allowed to run on.
                 };
                 cpu@1 {
                         clock-frequency = <1600000000>;
+                        timebase-frequency = <1000000>;
                         compatible = "sifive,rocket0", "riscv";
                         d-cache-block-size = <64>;
                         d-cache-sets = <64>;
@@ -145,6 +146,7 @@ Example: Spike ISA Simulator with 1 Hart
 This device tree matches the Spike ISA golden model as run with `spike -p1`.
 
         cpus {
+                timebase-frequency = <1000000>;
                 cpu@0 {
                         device_type = "cpu";
                         reg = <0x00000000>;
-- 
2.7.4