linux-kernel - [PATCH v2 1/3] dt-bindings: pinctrl: spacemit: add syscon property

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: <20260108-kx-pinctrl-aib-io-pwr-domain-v2-1-6bcb46146e53@linux.spacemit.com>
Date: Thu, 08 Jan 2026 14:42:38 +0800
From: Troy Mitchell <troy.mitchell@...ux.spacemit.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Yixun Lan <dlan@...too.org>, 
 Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, 
 Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>, 
 Linus Walleij <linusw@...nel.org>
Cc: devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 spacemit@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 linux-gpio@...r.kernel.org, 
 Troy Mitchell <troy.mitchell@...ux.spacemit.com>
Subject: [PATCH v2 1/3] dt-bindings: pinctrl: spacemit: add syscon property

In order to access the protected IO power domain registers, a valid
unlock sequence must be performed by writing the required keys to the
AIB Secure Access Register (ASAR).

The ASAR register resides within the APBC register address space.
A corresponding syscon property is added to allow the pinctrl driver
to access this register.

Signed-off-by: Troy Mitchell <troy.mitchell@...ux.spacemit.com>
---
Changelog in v2:
- add `spacemmit` prefix in the subject
- remove offset in syscon property
- remove `spacemit,apbc` property in required
- Link to v1: https://lore.kernel.org/spacemit/20260108042753-GYA2796@gentoo.org/T/#m2ab46cd63cbb1b110eb317ee5b9d540d39cbd82b
---
 Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml
index 9a76cffcbaee8eb465ebaad3f92c929c2a6815db..141dcedb81fba31bcad39b2fa267224b84ba0535 100644
--- a/Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml
@@ -32,6 +32,10 @@ properties:
   resets:
     maxItems: 1
 
+  spacemit,apbc:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: Phandle to syscon that access the protected register
+
 patternProperties:
   '-cfg$':
     type: object
@@ -138,6 +142,7 @@ examples:
             clocks = <&syscon_apbc 42>,
                      <&syscon_apbc 94>;
             clock-names = "func", "bus";
+            spacemit,apbc = <&syscon_apbc>;
 
             uart0_2_cfg: uart0-2-cfg {
                 uart0-2-pins {

-- 
2.52.0