[PW_SID:1120188] Add UFS Host driver support for SpacemiT K3 SoC

Documentation/devicetree/bindings/ufs/spacemit,k3-ufshc.yaml

@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ufs/spacemit,k3-ufshc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SpacemiT K3 SoC UFS Host Controller
+
+maintainers:
+  - Yixun Lan <dlan@kernel.org>
+
+properties:
+  compatible:
+    const: spacemit,k3-ufshc
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: aclk
+      - const: ref_clk
+
+  resets:
+    maxItems: 1
+
+required:
+  - reg
+  - clocks
+  - clock-names
+  - resets
+
+allOf:
+  - $ref: ufs-common.yaml
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/spacemit,k3-clocks.h>
+    #include <dt-bindings/reset/spacemit,k3-resets.h>
+    ufs@c0e00000 {
+        compatible = "spacemit,k3-ufshc";
+        reg = <0xc0e00000 0x40000>;
+        clocks = <&syscon_apmu CLK_APMU_UFS_ACLK>,
+        <&syscon_apmu CLK_APMU_UFS_REFCLK>;
+        clock-names = "aclk", "ref_clk";
+        resets = <&syscon_apmu RESET_APMU_UFS_ACLK>;
+        freq-table-hz = <491520000 491520000 19200000 19200000>;
+        lanes-per-direction = <2>;
+    };

arch/riscv/boot/dts/spacemit/k3-com260-ifx.dts

@@ -19,3 +19,7 @@
 		stdout-path = "serial0:115200n8";
 	};
 };
+
+&ufshc {
+	status = "okay";
+};

arch/riscv/boot/dts/spacemit/k3-pico-itx.dts

@@ -221,3 +221,7 @@
 &usb2_phy {
 	status = "okay";
 };
+
+&ufshc {
+	status = "okay";
+};

arch/riscv/boot/dts/spacemit/k3.dtsi

@@ -1186,5 +1186,18 @@
 			riscv,num-sources = <512>;
 			status = "reserved";
 		};
+
+		ufshc: ufshc@c0e00000 {
+			compatible = "spacemit,k3-ufshc";
+			reg = <0x0 0xc0e00000 0x0 0x40000>;
+			clocks = <&syscon_apmu CLK_APMU_UFS_ACLK>,
+				 <&syscon_apmu CLK_APMU_UFS_REFCLK>;
+			clock-names = "aclk", "ref_clk";
+			resets = <&syscon_apmu RESET_APMU_UFS_ACLK>;
+			interrupts = <135 IRQ_TYPE_LEVEL_HIGH>;
+			freq-table-hz = <491520000 491520000 19200000 19200000>;
+			lanes-per-direction = <2>;
+			status = "disabled";
+		};
 	};
 };

drivers/ufs/host/Kconfig

@@ -132,6 +132,18 @@ config SCSI_UFS_VARIABLE_SG_ENTRY_SIZE
 	bool
 	default y if SCSI_UFS_EXYNOS && SCSI_UFS_CRYPTO
 
+config SCSI_UFS_SPACEMIT
+	tristate "SpacemiT UFS controller driver"
+	depends on SCSI_UFSHCD_PLATFORM && ARCH_SPACEMIT
+	help
+	  This selects the SpacemiT specific additions to UFSHCD platform driver.
+	  UFS host on SpacemiT needs some vendor specific configuration before
+	  accessing the hardware which includes PHY configuration and vendor
+	  specific registers.
+
+	  Select this if you have UFS controller on SpacemiT chipset.
+	  If unsure, say N.
+
 config SCSI_UFS_SPRD
 	tristate "Unisoc specific hooks to UFS controller platform driver"
 	depends on SCSI_UFSHCD_PLATFORM && (ARCH_SPRD || COMPILE_TEST)

drivers/ufs/host/Makefile

@@ -11,6 +11,7 @@ obj-$(CONFIG_SCSI_UFS_HISI) += ufs-hisi.o
 obj-$(CONFIG_SCSI_UFS_MEDIATEK) += ufs-mediatek.o
 obj-$(CONFIG_SCSI_UFS_RENESAS) += ufs-renesas.o
 obj-$(CONFIG_SCSI_UFS_ROCKCHIP) += ufs-rockchip.o
+obj-$(CONFIG_SCSI_UFS_SPACEMIT) += ufs-spacemit.o
 obj-$(CONFIG_SCSI_UFS_SPRD) += ufs-sprd.o
 obj-$(CONFIG_SCSI_UFS_TI_J721E) += ti-j721e-ufs.o
 obj-$(CONFIG_SCSI_UFS_AMD_VERSAL2) += ufs-amd-versal2.o ufshcd-dwc.o