linux-kernel - [PATCH 07/14] dt-bindings: pinctrl: stm32: support IO synchronization parameters

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

Message-ID: <20241022155658.1647350-8-antonio.borneo@foss.st.com>
Date: Tue, 22 Oct 2024 17:56:51 +0200
From: Antonio Borneo <antonio.borneo@...s.st.com>
To: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue
	<alexandre.torgue@...s.st.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, <linux-gpio@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
CC: Antonio Borneo <antonio.borneo@...s.st.com>,
        <linux-kernel@...r.kernel.org>,
        Clément Le Goffic
	<clement.legoffic@...s.st.com>,
        Stephane Danieau
	<stephane.danieau@...s.st.com>,
        Amelie Delaunay
	<amelie.delaunay@...s.st.com>,
        Fabien Dessenne <fabien.dessenne@...s.st.com>,
        Valentin Caron <valentin.caron@...s.st.com>,
        Gatien Chevallier
	<gatien.chevallier@...s.st.com>,
        Cheick Traore <cheick.traore@...s.st.com>,
        <linux-stm32@...md-mailman.stormreply.com>
Subject: [PATCH 07/14] dt-bindings: pinctrl: stm32: support IO synchronization parameters

From: Fabien Dessenne <fabien.dessenne@...s.st.com>

Support the following IO synchronization parameters:
- Delay (in ns)
- Delay path (input / output)
- Clock edge (single / double edge)
- Clock inversion
- Retiming

Signed-off-by: Fabien Dessenne <fabien.dessenne@...s.st.com>
Signed-off-by: Antonio Borneo <antonio.borneo@...s.st.com>
---
 .../bindings/pinctrl/st,stm32-pinctrl.yaml    | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml
index 5d17d6487ae9c..9a7ecfea6eb5b 100644
--- a/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml
@@ -207,6 +207,54 @@ patternProperties:
               3: High speed
             $ref: /schemas/types.yaml#/definitions/uint32
             enum: [0, 1, 2, 3]
+          st,io-delay-path:
+            description: |
+              IO synchronization delay path location
+              0: Delay switched into the output path
+              1: Delay switched into the input path
+            $ref: /schemas/types.yaml#/definitions/uint32
+            enum: [0, 1]
+          st,io-clk-edge:
+            description: |
+              IO synchronization clock edge
+              0: Data single-edge (changing on rising or falling clock edge)
+              1: Data double-edge (changing on both clock edges)
+            $ref: /schemas/types.yaml#/definitions/uint32
+            enum: [0, 1]
+          st,io-clk-type:
+            description: |
+              IO synchronization clock inversion
+              0: IO clocks not inverted. Data retimed to rising clock edge
+              1: IO clocks inverted. Data retimed to falling clock edge
+            $ref: /schemas/types.yaml#/definitions/uint32
+            enum: [0, 1]
+          st,io-retime:
+            description: |
+              IO synchronization data retime
+              0: Data not synchronized or retimed on clock edges
+              1: Data retimed to either rising or falling clock edge
+            $ref: /schemas/types.yaml#/definitions/uint32
+            enum: [0, 1]
+          st,io-delay:
+            description: |
+              IO synchronization delay applied to the input or output path
+              0: No delay
+              1: Delay 0.30 ns
+              2: Delay 0.50 ns
+              3: Delay 0.75 ns
+              4: Delay 1.00 ns
+              5: Delay 1.25 ns
+              6: Delay 1.50 ns
+              7: Delay 1.75 ns
+              8: Delay 2.00 ns
+              9: Delay 2.25 ns
+              10: Delay 2.50 ns
+              11: Delay 2.75 ns
+              12: Delay 3.00 ns
+              13: Delay 3.25 ns
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 13
 
         required:
           - pinmux
-- 
2.34.1