[PW_SID:1054702] Add Tenstorrent Atlantis Clock/Reset Controller

Documentation/devicetree/bindings/clock/tenstorrent,atlantis-prcm-rcpu.yaml

@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/tenstorrent,atlantis-prcm-rcpu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Tenstorrent Atlantis PRCM (Power, Reset, Clock Management) Module
+
+maintainers:
+  - Anirudh Srinivasan <asrinivasan@oss.tenstorrent.com>
+
+description:
+  Multifunctional register block found in Tenstorrent Atlantis SoC whose main
+  function is to control clocks and resets. This block is instantiated multiple
+  times in the SoC, each block controls clock and resets for a different
+  subsystem. RCPU prcm serves low speed IO interfaces.
+
+properties:
+  compatible:
+    enum:
+      - tenstorrent,atlantis-prcm-rcpu
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  "#clock-cells":
+    const: 1
+    description:
+      See <dt-bindings/clock/tenstorrent,atlantis-prcm-rcpu.h> for valid indices.
+
+  "#reset-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - "#clock-cells"
+  - "#reset-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    clock-controller@a8000000 {
+      compatible = "tenstorrent,atlantis-prcm-rcpu";
+      reg = <0xa8000000 0x10000>;
+      clocks = <&osc_24m>;
+      #clock-cells = <1>;
+      #reset-cells = <1>;
+    };

MAINTAINERS

@@ -22555,8 +22555,12 @@ M:	Joel Stanley <jms@oss.tenstorrent.com>
 L:	linux-riscv@lists.infradead.org
 S:	Maintained
 T:	git https://github.com/tenstorrent/linux.git
+F:	Documentation/devicetree/bindings/clock/tenstorrent,atlantis-prcm-rcpu.yaml
 F:	Documentation/devicetree/bindings/riscv/tenstorrent.yaml
 F:	arch/riscv/boot/dts/tenstorrent/
+F:	drivers/clk/tenstorrent/
+F:	drivers/reset/reset-tenstorrent-atlantis.c
+F:	include/dt-bindings/clock/tenstorrent,atlantis-prcm-rcpu.h
 
 RISC-V THEAD SoC SUPPORT
 M:	Drew Fustini <fustini@kernel.org>

drivers/clk/Kconfig

@@ -542,6 +542,7 @@ source "drivers/clk/starfive/Kconfig"
 source "drivers/clk/sunxi/Kconfig"
 source "drivers/clk/sunxi-ng/Kconfig"
 source "drivers/clk/tegra/Kconfig"
+source "drivers/clk/tenstorrent/Kconfig"
 source "drivers/clk/thead/Kconfig"
 source "drivers/clk/stm32/Kconfig"
 source "drivers/clk/ti/Kconfig"

drivers/clk/Makefile

@@ -156,6 +156,7 @@ obj-y					+= starfive/
 obj-$(CONFIG_ARCH_SUNXI)		+= sunxi/
 obj-y					+= sunxi-ng/
 obj-$(CONFIG_ARCH_TEGRA)		+= tegra/
+obj-y					+= tenstorrent/
 obj-$(CONFIG_ARCH_THEAD)		+= thead/
 obj-y					+= ti/
 obj-$(CONFIG_CLK_UNIPHIER)		+= uniphier/

drivers/clk/tenstorrent/Kconfig

@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config TENSTORRENT_ATLANTIS_PRCM
+	tristate "Support for Tenstorrent Atlantis PRCM Clock Controller"
+	depends on ARCH_TENSTORRENT || COMPILE_TEST
+	default ARCH_TENSTORRENT
+	select REGMAP_MMIO
+	select AUXILIARY_BUS
+	select MFD_SYSCON
+	help
+	  Say yes here to support the different clock
+	  controllers found in the Tenstorrent Atlantis SoC.
+	  This includes the clocks from the RCPU, HSIO, MMIO
+	  and PCIE domain.

drivers/clk/tenstorrent/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_TENSTORRENT_ATLANTIS_PRCM)	+= atlantis-prcm.o