dt-bindings: clock: Add RaspberryPi RP1 clock bindings

Add device tree bindings for the clock generator found in RP1 multi
function device, and relative entries in MAINTAINERS file.

Signed-off-by: Andrea della Porta <andrea.porta@suse.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/20250529135052.28398-1-andrea.porta@suse.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>

Documentation/devicetree/bindings/clock/raspberrypi,rp1-clocks.yaml

@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/raspberrypi,rp1-clocks.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RaspberryPi RP1 clock generator
+
+maintainers:
+  - A. della Porta <andrea.porta@suse.com>
+
+description: |
+  The RP1 contains a clock generator designed as three PLLs (CORE, AUDIO,
+  VIDEO), and each PLL output can be programmed through dividers to generate
+  the clocks to drive the sub-peripherals embedded inside the chipset.
+
+  Link to datasheet:
+  https://datasheets.raspberrypi.com/rp1/rp1-peripherals.pdf
+
+properties:
+  compatible:
+    const: raspberrypi,rp1-clocks
+
+  reg:
+    maxItems: 1
+
+  '#clock-cells':
+    const: 1
+    description:
+      The available clocks are defined in
+      include/dt-bindings/clock/raspberrypi,rp1-clocks.h.
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/raspberrypi,rp1-clocks.h>
+
+    rp1 {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        clocks@c040018000 {
+            compatible = "raspberrypi,rp1-clocks";
+            reg = <0xc0 0x40018000 0x0 0x10038>;
+            #clock-cells = <1>;
+            clocks = <&clk_rp1_xosc>;
+        };
+    };

include/dt-bindings/clock/raspberrypi,rp1-clocks.h

@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Copyright (C) 2021 Raspberry Pi Ltd.
+ */
+
+#ifndef __DT_BINDINGS_CLOCK_RASPBERRYPI_RP1
+#define __DT_BINDINGS_CLOCK_RASPBERRYPI_RP1
+
+#define RP1_PLL_SYS_CORE		0
+#define RP1_PLL_AUDIO_CORE		1
+#define RP1_PLL_VIDEO_CORE		2
+
+#define RP1_PLL_SYS			3
+#define RP1_PLL_AUDIO			4
+#define RP1_PLL_VIDEO			5
+
+#define RP1_PLL_SYS_PRI_PH		6
+#define RP1_PLL_SYS_SEC_PH		7
+#define RP1_PLL_AUDIO_PRI_PH		8
+
+#define RP1_PLL_SYS_SEC			9
+#define RP1_PLL_AUDIO_SEC		10
+#define RP1_PLL_VIDEO_SEC		11
+
+#define RP1_CLK_SYS			12
+#define RP1_CLK_SLOW_SYS		13
+#define RP1_CLK_DMA			14
+#define RP1_CLK_UART			15
+#define RP1_CLK_ETH			16
+#define RP1_CLK_PWM0			17
+#define RP1_CLK_PWM1			18
+#define RP1_CLK_AUDIO_IN		19
+#define RP1_CLK_AUDIO_OUT		20
+#define RP1_CLK_I2S			21
+#define RP1_CLK_MIPI0_CFG		22
+#define RP1_CLK_MIPI1_CFG		23
+#define RP1_CLK_PCIE_AUX		24
+#define RP1_CLK_USBH0_MICROFRAME	25
+#define RP1_CLK_USBH1_MICROFRAME	26
+#define RP1_CLK_USBH0_SUSPEND		27
+#define RP1_CLK_USBH1_SUSPEND		28
+#define RP1_CLK_ETH_TSU			29
+#define RP1_CLK_ADC			30
+#define RP1_CLK_SDIO_TIMER		31
+#define RP1_CLK_SDIO_ALT_SRC		32
+#define RP1_CLK_GP0			33
+#define RP1_CLK_GP1			34
+#define RP1_CLK_GP2			35
+#define RP1_CLK_GP3			36
+#define RP1_CLK_GP4			37
+#define RP1_CLK_GP5			38
+#define RP1_CLK_VEC			39
+#define RP1_CLK_DPI			40
+#define RP1_CLK_MIPI0_DPI		41
+#define RP1_CLK_MIPI1_DPI		42
+
+/* Extra PLL output channels - RP1B0 only */
+#define RP1_PLL_VIDEO_PRI_PH		43
+#define RP1_PLL_AUDIO_TERN		44
+
+#endif