linux-kernel - [PATCH v2 1/5] dt-bindings: firmware: qcom-scm: Add "allow-multi-call" property

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Message-ID: <1658529438-9234-2-git-send-email-quic_gurus@quicinc.com>
Date:   Fri, 22 Jul 2022 15:37:14 -0700
From:   Guru Das Srinagesh <quic_gurus@...cinc.com>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     David Heidelberg <david@...t.cz>,
        Robert Marko <robimarko@...il.com>,
        Rajendra Nayak <quic_rjendra@...cinc.com>,
        Elliot Berman <quic_eberman@...cinc.com>,
        Guru Das Srinagesh <quic_gurus@...cinc.com>
Subject: [PATCH v2 1/5] dt-bindings: firmware: qcom-scm: Add "allow-multi-call" property

For firmware that supports it, allow multiple SCM calls to be passed
down to it by removing the serialization lock in the SCM driver.

This patch is based on this YAML conversion patch [1] that is in-flight
currently.

[1] https://lore.kernel.org/lkml/20220708090431.30437-1-david@ixit.cz/

Signed-off-by: Guru Das Srinagesh <quic_gurus@...cinc.com>
---
 Documentation/devicetree/bindings/firmware/qcom,scm.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
index 9fdeee0..e279fd2 100644
--- a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
+++ b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
@@ -70,6 +70,11 @@ properties:
   '#reset-cells':
     const: 1
 
+  allow-multi-call:
+    description:
+      Specify this flag to remove SCM call serialization. Need to ensure that
+      the firmware being used supports this feature first.
+
   qcom,dload-mode:
     $ref: /schemas/types.yaml#/definitions/phandle-array
     items:
-- 
2.7.4