Merge tag 'spacemit-clk-for-6.16-1' of https://github.com/spacemit-com/linux into clk-spacemit

Pull SpacemiT clk driver updates from Yixun Lan:

 - Add clock driver for SpacemiT K1 SoC
 - Add TWSI8 clock, workaround the read quirk

* tag 'spacemit-clk-for-6.16-1' of https://github.com/spacemit-com/linux:
  clk: spacemit: k1: Add TWSI8 bus and function clocks
  clk: spacemit: Add clock support for SpacemiT K1 SoC
  dt-bindings: clock: spacemit: Add spacemit,k1-pll
  dt-bindings: soc: spacemit: Add spacemit,k1-syscon

Author: bebarino

Documentation/devicetree/bindings/clock/spacemit,k1-pll.yaml

@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/spacemit,k1-pll.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SpacemiT K1 PLL
+
+maintainers:
+  - Haylen Chu <heylenay@4d2.org>
+
+properties:
+  compatible:
+    const: spacemit,k1-pll
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    description: External 24MHz oscillator
+
+  spacemit,mpmu:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to the "Main PMU (MPMU)" syscon. It is used to check PLL
+      lock status.
+
+  "#clock-cells":
+    const: 1
+    description:
+      See <dt-bindings/clock/spacemit,k1-syscon.h> for valid indices.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - spacemit,mpmu
+  - "#clock-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    clock-controller@d4090000 {
+        compatible = "spacemit,k1-pll";
+        reg = <0xd4090000 0x1000>;
+        clocks = <&vctcxo_24m>;
+        spacemit,mpmu = <&sysctl_mpmu>;
+        #clock-cells = <1>;
+    };

Documentation/devicetree/bindings/soc/spacemit/spacemit,k1-syscon.yaml

@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/spacemit/spacemit,k1-syscon.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SpacemiT K1 SoC System Controller
+
+maintainers:
+  - Haylen Chu <heylenay@4d2.org>
+
+description:
+  System controllers found on SpacemiT K1 SoC, which are capable of
+  clock, reset and power-management functions.
+
+properties:
+  compatible:
+    enum:
+      - spacemit,k1-syscon-apbc
+      - spacemit,k1-syscon-apmu
+      - spacemit,k1-syscon-mpmu
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 4
+
+  clock-names:
+    items:
+      - const: osc
+      - const: vctcxo_1m
+      - const: vctcxo_3m
+      - const: vctcxo_24m
+
+  "#clock-cells":
+    const: 1
+    description:
+      See <dt-bindings/clock/spacemit,k1-syscon.h> for valid indices.
+
+  "#power-domain-cells":
+    const: 1
+
+  "#reset-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - "#clock-cells"
+  - "#reset-cells"
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: spacemit,k1-syscon-apbc
+    then:
+      properties:
+        "#power-domain-cells": false
+    else:
+      required:
+        - "#power-domain-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    system-controller@d4050000 {
+        compatible = "spacemit,k1-syscon-mpmu";
+        reg = <0xd4050000 0x209c>;
+        clocks = <&osc>, <&vctcxo_1m>, <&vctcxo_3m>, <&vctcxo_24m>;
+        clock-names = "osc", "vctcxo_1m", "vctcxo_3m", "vctcxo_24m";
+        #clock-cells = <1>;
+        #power-domain-cells = <1>;
+        #reset-cells = <1>;
+    };

drivers/clk/Kconfig

@@ -517,6 +517,7 @@ source "drivers/clk/samsung/Kconfig"
 source "drivers/clk/sifive/Kconfig"
 source "drivers/clk/socfpga/Kconfig"
 source "drivers/clk/sophgo/Kconfig"
+source "drivers/clk/spacemit/Kconfig"
 source "drivers/clk/sprd/Kconfig"
 source "drivers/clk/starfive/Kconfig"
 source "drivers/clk/sunxi/Kconfig"

drivers/clk/Makefile

@@ -145,6 +145,7 @@ obj-$(CONFIG_COMMON_CLK_SAMSUNG)	+= samsung/
 obj-$(CONFIG_CLK_SIFIVE)		+= sifive/
 obj-y					+= socfpga/
 obj-y					+= sophgo/
+obj-y					+= spacemit/
 obj-$(CONFIG_PLAT_SPEAR)		+= spear/
 obj-y					+= sprd/
 obj-$(CONFIG_ARCH_STI)			+= st/

drivers/clk/spacemit/Kconfig

@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config SPACEMIT_CCU
+	tristate "Clock support for SpacemiT SoCs"
+	depends on ARCH_SPACEMIT || COMPILE_TEST
+	select MFD_SYSCON
+	help
+	  Say Y to enable clock controller unit support for SpacemiT SoCs.
+
+if SPACEMIT_CCU
+
+config SPACEMIT_K1_CCU
+	tristate "Support for SpacemiT K1 SoC"
+	depends on ARCH_SPACEMIT || COMPILE_TEST
+	help
+	  Support for clock controller unit in SpacemiT K1 SoC.
+
+endif

drivers/clk/spacemit/Makefile

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_SPACEMIT_K1_CCU)	= spacemit-ccu-k1.o
+spacemit-ccu-k1-y		= ccu_pll.o ccu_mix.o ccu_ddn.o
+spacemit-ccu-k1-y		+= ccu-k1.o