linux-kernel - [PATCH v2 3/3] riscv: dts: spacemit: modify pinctrl node in dtsi

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Message-Id: <20260108-kx-pinctrl-aib-io-pwr-domain-v2-3-6bcb46146e53@linux.spacemit.com>
Date: Thu, 08 Jan 2026 14:42:40 +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 3/3] riscv: dts: spacemit: modify pinctrl node in dtsi

Change the size of the reg register to 0x1000 to match the hardware.
This register range covers the IO power domain's register addresses.

The IO power domain registers are protected. 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 `spacemit,apbc` is added to allow
the pinctrl driver to access this register.

Signed-off-by: Troy Mitchell <troy.mitchell@...ux.spacemit.com>
---
 arch/riscv/boot/dts/spacemit/k1.dtsi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
index 7818ca4979b6a7755722919a5958512aa11950ab..f05429723d1bbbd718941549782461c49196ecef 100644
--- a/arch/riscv/boot/dts/spacemit/k1.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
@@ -565,10 +565,11 @@ i2c8: i2c@...1d800 {
 
 		pinctrl: pinctrl@...1e000 {
 			compatible = "spacemit,k1-pinctrl";
-			reg = <0x0 0xd401e000 0x0 0x400>;
+			reg = <0x0 0xd401e000 0x0 0x1000>;
 			clocks = <&syscon_apbc CLK_AIB>,
 				 <&syscon_apbc CLK_AIB_BUS>;
 			clock-names = "func", "bus";
+			spacemit,apbc = <&syscon_apbc>;
 		};
 
 		pwm8: pwm@...20000 {

-- 
2.52.0