[PATCH v3] riscv: dts: spacemit: k3: Add QSPI support for Pico-ITX board

[Zhengyu He]

Enable QSPI with proper pinmux on the Pico-ITX board, and describe the
NOR flash wired to it.

Tested-by: Aurelien Jarno <aurelien at aurel32.net>
Reviewed-by: Aurelien Jarno <aurelien at aurel32.net>
Signed-off-by: Cody Kang <cody.kang.hk at outlook.com>
Signed-off-by: Zhengyu He <hezhy472013 at gmail.com>
---
Changes in v3:
- Drop the already applied binding patch.
- Update the subject and simplify the commit message.
- Use the existing qspi_cfg label for the Pico-ITX pinctrl override.
- Rebase onto v7.2-rc2.

Changes in v2:
- Add "spacemit,k1-qspi" fallback to the K3 QSPI compatible.
- Reordered Signed-off-by trailers.

Base: v7.2-rc2

Here is version 2:
  https://lore.kernel.org/all/20260521-k3-pico-itx-qspi-v2-for-next-20260521-v2-0-52bce26e5fd8@gmail.com/

Here is version 1:
  https://lore.kernel.org/r/20260519-k3-pico-itx-qspi-v1-v1-0-c32afeeaf741@gmail.com
---
 arch/riscv/boot/dts/spacemit/k3-pico-itx.dts | 56 ++++++++++++++++++++++++++++
 arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi | 21 +++++++++++
 arch/riscv/boot/dts/spacemit/k3.dtsi         | 17 +++++++++
 3 files changed, 94 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
index b89c1521e664..fd2b154f275a 100644
--- a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
+++ b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
@@ -200,6 +200,62 @@ phy0: phy at 1 {
 	};
 };
 
+&qspi_cfg {
+	qspi-pins {
+		power-source = <1800>;
+	};
+
+	qspi-cs0-pins {
+		power-source = <1800>;
+	};
+};
+
+&qspi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&qspi_cfg>;
+	status = "okay";
+
+	flash at 0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <26500000>;
+		spi-rx-bus-width = <4>;
+		spi-tx-bus-width = <4>;
+		vcc-supply = <&aldo2>; /* PMIC_VCC1V8_QSPI */
+		m25p,fast-read;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			bootinfo at 0 {
+				reg = <0x0 0x20000>;
+			};
+
+			fsbl at 20000 {
+				reg = <0x20000 0x80000>;
+			};
+
+			env at a0000 {
+				reg = <0xa0000 0x10000>;
+			};
+
+			esos at b0000 {
+				reg = <0xb0000 0x100000>;
+			};
+
+			opensbi at 1b0000 {
+				reg = <0x1b0000 0x60000>;
+			};
+
+			uboot at 210000 {
+				reg = <0x210000 0x5f0000>;
+			};
+		};
+	};
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_0_cfg>;
diff --git a/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi b/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi
index 3ee1471f3798..846d5e8cc783 100644
--- a/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi
@@ -679,6 +679,27 @@ pwm19-2-pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	qspi_cfg: qspi-cfg {
+		qspi-pins {
+			pinmux = <K3_PADCONF(138, 0)>,	/* qspi dat0 */
+				 <K3_PADCONF(139, 0)>,	/* qspi dat1 */
+				 <K3_PADCONF(140, 0)>,	/* qspi dat2 */
+				 <K3_PADCONF(141, 0)>,	/* qspi dat3 */
+				 <K3_PADCONF(144, 0)>;	/* qspi clk */
+
+			bias-disable;
+			drive-strength = <25>;
+		};
+
+		qspi-cs0-pins {
+			pinmux = <K3_PADCONF(142, 0)>;	/* qspi cs0 */
+
+			bias-disable;
+			drive-strength = <25>;
+		};
+	};
+
 	/omit-if-no-ref/
 	uart0_0_cfg: uart0-0-cfg {
 		uart0-0-pins {
diff --git a/arch/riscv/boot/dts/spacemit/k3.dtsi b/arch/riscv/boot/dts/spacemit/k3.dtsi
index 19fc9b49668e..9a49dd8032bf 100644
--- a/arch/riscv/boot/dts/spacemit/k3.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k3.dtsi
@@ -1099,6 +1099,23 @@ pll: clock-controller at d4090000 {
 			#clock-cells = <1>;
 		};
 
+		qspi: spi at d420c000 {
+			compatible = "spacemit,k3-qspi",
+				     "spacemit,k1-qspi";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x0 0xd420c000 0x0 0x1000>,
+			      <0x0 0xb8000000 0x0 0xc00000>;
+			reg-names = "QuadSPI", "QuadSPI-memory";
+			clocks = <&syscon_apmu CLK_APMU_QSPI_BUS>,
+				 <&syscon_apmu CLK_APMU_QSPI>;
+			clock-names = "qspi_en", "qspi";
+			resets = <&syscon_apmu RESET_APMU_QSPI>,
+				 <&syscon_apmu RESET_APMU_QSPI_BUS>;
+			interrupts = <117 IRQ_TYPE_LEVEL_HIGH>;
+			status = "disabled";
+		};
+
 		syscon_apmu: system-controller at d4282800 {
 			compatible = "spacemit,k3-syscon-apmu";
 			reg = <0x0 0xd4282800 0x0 0x400>;

---
base-commit: 8cdeaa50eae8dad34885515f62559ee83e7e8dda
change-id: 20260709-k3-pico-itx-qspi-v3-7f81b2c023cc

Best regards,
-- 
Zhengyu He <hezhy472013 at gmail.com>