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dt-bindings: pinctrl: spacemit: add syscon property

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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@linux.spacemit.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Linus Walleij <linusw@kernel.org>
This commit is contained in:
Troy Mitchell 2026-01-08 14:42:38 +08:00 committed by Linus Walleij
parent 76d415763b
commit e817f0223d
1 changed files with 5 additions and 0 deletions
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5
Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml
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@ -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 {