linux-kernel - [PATCH v2 3/4] riscv: dts: spacemit: add pinctrl support for K1 SoC

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Message-Id: <20240825-02-k1-pinctrl-v2-3-ddd38a345d12@gentoo.org>
Date: Sun, 25 Aug 2024 13:10:04 +0000
From: Yixun Lan <dlan@...too.org>
To: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Conor Dooley <conor@...nel.org>
Cc: Yangyu Chen <cyy@...self.name>, Jesse Taube <jesse@...osinc.com>, 
 Jisheng Zhang <jszhang@...nel.org>, Inochi Amaoto <inochiama@...look.com>, 
 Icenowy Zheng <uwu@...nowy.me>, Meng Zhang <zhangmeng.kevin@...cemit.com>, 
 Meng Zhang <kevin.z.m@...mail.com>, devicetree@...r.kernel.org, 
 linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-gpio@...r.kernel.org, Yixun Lan <dlan@...too.org>
Subject: [PATCH v2 3/4] riscv: dts: spacemit: add pinctrl support for K1
 SoC

Add pinctrl device tree data to SpacemiT's K1 SoC.

Signed-off-by: Yixun Lan <dlan@...too.org>
---
Note, only minimal device tree data added in this series,
which just try to demonstrate this pinctrl driver, but
more dt data can be added later, in separate patches.
---
 arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi | 19 +++++++++++++++++++
 arch/riscv/boot/dts/spacemit/k1.dtsi         |  5 +++++
 2 files changed, 24 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
new file mode 100644
index 0000000000000..38ccaad1209f5
--- /dev/null
+++ b/arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (c) 2024 Yixun Lan <dlan@...too.org>
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/spacemit,k1-pinctrl.h>
+
+&pinctrl {
+	uart0_2_cfg: uart0-2-cfg {
+		uart0-2-pins {
+			pinmux = <K1_PADCONF(GPIO_68, 2)>,
+				 <K1_PADCONF(GPIO_69, 2)>;
+
+			bias-pull-up;
+			drive-strength-microamp = <32>;
+		};
+	};
+};
diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
index 0777bf9e01183..a2d5f7d4a942a 100644
--- a/arch/riscv/boot/dts/spacemit/k1.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
@@ -416,6 +416,11 @@ uart9: serial@...17800 {
 			status = "disabled";
 		};
 
+		pinctrl: pinctrl@...1e000 {
+			compatible = "spacemit,k1-pinctrl";
+			reg = <0x0 0xd401e000 0x0 0x400>;
+		};
+
 		plic: interrupt-controller@...00000 {
 			compatible = "spacemit,k1-plic", "sifive,plic-1.0.0";
 			reg = <0x0 0xe0000000 0x0 0x4000000>;

-- 
2.45.2