linux-kernel - [PATCH V2 4/4] dt-bindings: lpspi: New property in document DT bindings for LPSPI

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200727031513.31774-1-xiaoning.wang@nxp.com>
Date:   Mon, 27 Jul 2020 11:15:13 +0800
From:   Clark Wang <xiaoning.wang@....com>
To:     broonie@...nel.org, robh+dt@...nel.org, Anson.Huang@....com
Cc:     linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH V2 4/4] dt-bindings: lpspi: New property in document DT bindings for LPSPI

Add "fsl,spi-only-use-cs1-sel" to fit i.MX8DXL-EVK.
Spi common code does not support use of CS signals discontinuously.
It only uses CS1 without using CS0. So, add this property to re-config
chipselect value.

Signed-off-by: Clark Wang <xiaoning.wang@....com>
---
Changes:
V2:
 - New patch added in the v2 patchset.
---
 Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml
index 143b94a1883a..22882e769e26 100644
--- a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml
@@ -34,6 +34,12 @@ properties:
       - const: per
       - const: ipg
 
+  fsl,spi-only-use-cs1-sel:
+    description:
+      spi common code does not support use of CS signals discontinuously.
+      i.MX8DXL-EVK board only uses CS1 without using CS0. Therefore, add
+      this property to re-config the chipselect value in the LPSPI driver.
+
 required:
   - compatible
   - reg
@@ -57,4 +63,5 @@ examples:
                  <&clks IMX7ULP_CLK_DUMMY>;
         clock-names = "per", "ipg";
         spi-slave;
+        fsl,spi-only-use-cs1-sel;
     };
-- 
2.17.1