diff --git a/Documentation/devicetree/bindings/clock/renesas,rzg2l-cpg.yaml b/Documentation/devicetree/bindings/clock/renesas,rzg2l-cpg.yaml
index 487f74cdc749..461a04a40c81 100644
--- a/Documentation/devicetree/bindings/clock/renesas,rzg2l-cpg.yaml
+++ b/Documentation/devicetree/bindings/clock/renesas,rzg2l-cpg.yaml
@@ -27,6 +27,7 @@ properties:
       - renesas,r9a07g043-cpg # RZ/G2UL{Type-1,Type-2} and RZ/Five
       - renesas,r9a07g044-cpg # RZ/G2{L,LC}
       - renesas,r9a07g054-cpg # RZ/V2L
+      - renesas,r9a08g045-cpg # RZ/G3S
       - renesas,r9a09g011-cpg # RZ/V2M
 
   reg:
diff --git a/include/dt-bindings/clock/r9a08g045-cpg.h b/include/dt-bindings/clock/r9a08g045-cpg.h
new file mode 100644
index 000000000000..410725b778a8
--- /dev/null
+++ b/include/dt-bindings/clock/r9a08g045-cpg.h
@@ -0,0 +1,242 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+ *
+ * Copyright (C) 2023 Renesas Electronics Corp.
+ */
+#ifndef __DT_BINDINGS_CLOCK_R9A08G045_CPG_H__
+#define __DT_BINDINGS_CLOCK_R9A08G045_CPG_H__
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/* R9A08G045 CPG Core Clocks */
+#define R9A08G045_CLK_I			0
+#define R9A08G045_CLK_I2		1
+#define R9A08G045_CLK_I3		2
+#define R9A08G045_CLK_S0		3
+#define R9A08G045_CLK_SPI0		4
+#define R9A08G045_CLK_SPI1		5
+#define R9A08G045_CLK_SD0		6
+#define R9A08G045_CLK_SD1		7
+#define R9A08G045_CLK_SD2		8
+#define R9A08G045_CLK_M0		9
+#define R9A08G045_CLK_HP		10
+#define R9A08G045_CLK_TSU		11
+#define R9A08G045_CLK_ZT		12
+#define R9A08G045_CLK_P0		13
+#define R9A08G045_CLK_P1		14
+#define R9A08G045_CLK_P2		15
+#define R9A08G045_CLK_P3		16
+#define R9A08G045_CLK_P4		17
+#define R9A08G045_CLK_P5		18
+#define R9A08G045_CLK_AT		19
+#define R9A08G045_CLK_OC0		20
+#define R9A08G045_CLK_OC1		21
+#define R9A08G045_OSCCLK		22
+#define R9A08G045_OSCCLK2		23
+#define R9A08G045_SWD			24
+
+/* R9A08G045 Module Clocks */
+#define R9A08G045_OCTA_ACLK		0
+#define R9A08G045_OCTA_MCLK		1
+#define R9A08G045_CA55_SCLK		2
+#define R9A08G045_CA55_PCLK		3
+#define R9A08G045_CA55_ATCLK		4
+#define R9A08G045_CA55_GICCLK		5
+#define R9A08G045_CA55_PERICLK		6
+#define R9A08G045_CA55_ACLK		7
+#define R9A08G045_CA55_TSCLK		8
+#define R9A08G045_SRAM_ACPU_ACLK0	9
+#define R9A08G045_SRAM_ACPU_ACLK1	10
+#define R9A08G045_SRAM_ACPU_ACLK2	11
+#define R9A08G045_GIC600_GICCLK		12
+#define R9A08G045_IA55_CLK		13
+#define R9A08G045_IA55_PCLK		14
+#define R9A08G045_MHU_PCLK		15
+#define R9A08G045_SYC_CNT_CLK		16
+#define R9A08G045_DMAC_ACLK		17
+#define R9A08G045_DMAC_PCLK		18
+#define R9A08G045_OSTM0_PCLK		19
+#define R9A08G045_OSTM1_PCLK		20
+#define R9A08G045_OSTM2_PCLK		21
+#define R9A08G045_OSTM3_PCLK		22
+#define R9A08G045_OSTM4_PCLK		23
+#define R9A08G045_OSTM5_PCLK		24
+#define R9A08G045_OSTM6_PCLK		25
+#define R9A08G045_OSTM7_PCLK		26
+#define R9A08G045_MTU_X_MCK_MTU3	27
+#define R9A08G045_POE3_CLKM_POE		28
+#define R9A08G045_GPT_PCLK		29
+#define R9A08G045_POEG_A_CLKP		30
+#define R9A08G045_POEG_B_CLKP		31
+#define R9A08G045_POEG_C_CLKP		32
+#define R9A08G045_POEG_D_CLKP		33
+#define R9A08G045_WDT0_PCLK		34
+#define R9A08G045_WDT0_CLK		35
+#define R9A08G045_WDT1_PCLK		36
+#define R9A08G045_WDT1_CLK		37
+#define R9A08G045_WDT2_PCLK		38
+#define R9A08G045_WDT2_CLK		39
+#define R9A08G045_SPI_HCLK		40
+#define R9A08G045_SPI_ACLK		41
+#define R9A08G045_SPI_CLK		42
+#define R9A08G045_SPI_CLKX2		43
+#define R9A08G045_SDHI0_IMCLK		44
+#define R9A08G045_SDHI0_IMCLK2		45
+#define R9A08G045_SDHI0_CLK_HS		46
+#define R9A08G045_SDHI0_ACLK		47
+#define R9A08G045_SDHI1_IMCLK		48
+#define R9A08G045_SDHI1_IMCLK2		49
+#define R9A08G045_SDHI1_CLK_HS		50
+#define R9A08G045_SDHI1_ACLK		51
+#define R9A08G045_SDHI2_IMCLK		52
+#define R9A08G045_SDHI2_IMCLK2		53
+#define R9A08G045_SDHI2_CLK_HS		54
+#define R9A08G045_SDHI2_ACLK		55
+#define R9A08G045_SSI0_PCLK2		56
+#define R9A08G045_SSI0_PCLK_SFR		57
+#define R9A08G045_SSI1_PCLK2		58
+#define R9A08G045_SSI1_PCLK_SFR		59
+#define R9A08G045_SSI2_PCLK2		60
+#define R9A08G045_SSI2_PCLK_SFR		61
+#define R9A08G045_SSI3_PCLK2		62
+#define R9A08G045_SSI3_PCLK_SFR		63
+#define R9A08G045_SRC_CLKP		64
+#define R9A08G045_USB_U2H0_HCLK		65
+#define R9A08G045_USB_U2H1_HCLK		66
+#define R9A08G045_USB_U2P_EXR_CPUCLK	67
+#define R9A08G045_USB_PCLK		68
+#define R9A08G045_ETH0_CLK_AXI		69
+#define R9A08G045_ETH0_CLK_CHI		70
+#define R9A08G045_ETH0_REFCLK		71
+#define R9A08G045_ETH1_CLK_AXI		72
+#define R9A08G045_ETH1_CLK_CHI		73
+#define R9A08G045_ETH1_REFCLK		74
+#define R9A08G045_I2C0_PCLK		75
+#define R9A08G045_I2C1_PCLK		76
+#define R9A08G045_I2C2_PCLK		77
+#define R9A08G045_I2C3_PCLK		78
+#define R9A08G045_SCIF0_CLK_PCK		79
+#define R9A08G045_SCIF1_CLK_PCK		80
+#define R9A08G045_SCIF2_CLK_PCK		81
+#define R9A08G045_SCIF3_CLK_PCK		82
+#define R9A08G045_SCIF4_CLK_PCK		83
+#define R9A08G045_SCIF5_CLK_PCK		84
+#define R9A08G045_SCI0_CLKP		85
+#define R9A08G045_SCI1_CLKP		86
+#define R9A08G045_IRDA_CLKP		87
+#define R9A08G045_RSPI0_CLKB		88
+#define R9A08G045_RSPI1_CLKB		89
+#define R9A08G045_RSPI2_CLKB		90
+#define R9A08G045_RSPI3_CLKB		91
+#define R9A08G045_RSPI4_CLKB		92
+#define R9A08G045_CANFD_PCLK		93
+#define R9A08G045_CANFD_CLK_RAM		94
+#define R9A08G045_GPIO_HCLK		95
+#define R9A08G045_ADC_ADCLK		96
+#define R9A08G045_ADC_PCLK		97
+#define R9A08G045_TSU_PCLK		98
+#define R9A08G045_PDM_PCLK		99
+#define R9A08G045_PDM_CCLK		100
+#define R9A08G045_PCI_ACLK		101
+#define R9A08G045_PCI_CLKL1PM		102
+#define R9A08G045_SPDIF_PCLK		103
+#define R9A08G045_I3C_PCLK		104
+#define R9A08G045_I3C_TCLK		105
+#define R9A08G045_VBAT_BCLK		106
+
+/* R9A08G045 Resets */
+#define R9A08G045_CA55_RST_1_0		0
+#define R9A08G045_CA55_RST_3_0		1
+#define R9A08G045_CA55_RST_4		2
+#define R9A08G045_CA55_RST_5		3
+#define R9A08G045_CA55_RST_6		4
+#define R9A08G045_CA55_RST_7		5
+#define R9A08G045_CA55_RST_8		6
+#define R9A08G045_CA55_RST_9		7
+#define R9A08G045_CA55_RST_10		8
+#define R9A08G045_CA55_RST_11		9
+#define R9A08G045_CA55_RST_12		10
+#define R9A08G045_SRAM_ACPU_ARESETN0	11
+#define R9A08G045_SRAM_ACPU_ARESETN1	12
+#define R9A08G045_SRAM_ACPU_ARESETN2	13
+#define R9A08G045_GIC600_GICRESET_N	14
+#define R9A08G045_GIC600_DBG_GICRESET_N	15
+#define R9A08G045_IA55_RESETN		16
+#define R9A08G045_MHU_RESETN		17
+#define R9A08G045_DMAC_ARESETN		18
+#define R9A08G045_DMAC_RST_ASYNC	19
+#define R9A08G045_SYC_RESETN		20
+#define R9A08G045_OSTM0_PRESETZ		21
+#define R9A08G045_OSTM1_PRESETZ		22
+#define R9A08G045_OSTM2_PRESETZ		23
+#define R9A08G045_OSTM3_PRESETZ		24
+#define R9A08G045_OSTM4_PRESETZ		25
+#define R9A08G045_OSTM5_PRESETZ		26
+#define R9A08G045_OSTM6_PRESETZ		27
+#define R9A08G045_OSTM7_PRESETZ		28
+#define R9A08G045_MTU_X_PRESET_MTU3	29
+#define R9A08G045_POE3_RST_M_REG	30
+#define R9A08G045_GPT_RST_C		31
+#define R9A08G045_POEG_A_RST		32
+#define R9A08G045_POEG_B_RST		33
+#define R9A08G045_POEG_C_RST		34
+#define R9A08G045_POEG_D_RST		35
+#define R9A08G045_WDT0_PRESETN		36
+#define R9A08G045_WDT1_PRESETN		37
+#define R9A08G045_WDT2_PRESETN		38
+#define R9A08G045_SPI_HRESETN		39
+#define R9A08G045_SPI_ARESETN		40
+#define R9A08G045_SDHI0_IXRST		41
+#define R9A08G045_SDHI1_IXRST		42
+#define R9A08G045_SDHI2_IXRST		43
+#define R9A08G045_SSI0_RST_M2_REG	44
+#define R9A08G045_SSI1_RST_M2_REG	45
+#define R9A08G045_SSI2_RST_M2_REG	46
+#define R9A08G045_SSI3_RST_M2_REG	47
+#define R9A08G045_SRC_RST		48
+#define R9A08G045_USB_U2H0_HRESETN	49
+#define R9A08G045_USB_U2H1_HRESETN	50
+#define R9A08G045_USB_U2P_EXL_SYSRST	51
+#define R9A08G045_USB_PRESETN		52
+#define R9A08G045_ETH0_RST_HW_N		53
+#define R9A08G045_ETH1_RST_HW_N		54
+#define R9A08G045_I2C0_MRST		55
+#define R9A08G045_I2C1_MRST		56
+#define R9A08G045_I2C2_MRST		57
+#define R9A08G045_I2C3_MRST		58
+#define R9A08G045_SCIF0_RST_SYSTEM_N	59
+#define R9A08G045_SCIF1_RST_SYSTEM_N	60
+#define R9A08G045_SCIF2_RST_SYSTEM_N	61
+#define R9A08G045_SCIF3_RST_SYSTEM_N	62
+#define R9A08G045_SCIF4_RST_SYSTEM_N	63
+#define R9A08G045_SCIF5_RST_SYSTEM_N	64
+#define R9A08G045_SCI0_RST		65
+#define R9A08G045_SCI1_RST		66
+#define R9A08G045_IRDA_RST		67
+#define R9A08G045_RSPI0_RST		68
+#define R9A08G045_RSPI1_RST		69
+#define R9A08G045_RSPI2_RST		70
+#define R9A08G045_RSPI3_RST		71
+#define R9A08G045_RSPI4_RST		72
+#define R9A08G045_CANFD_RSTP_N		73
+#define R9A08G045_CANFD_RSTC_N		74
+#define R9A08G045_GPIO_RSTN		75
+#define R9A08G045_GPIO_PORT_RESETN	76
+#define R9A08G045_GPIO_SPARE_RESETN	77
+#define R9A08G045_ADC_PRESETN		78
+#define R9A08G045_ADC_ADRST_N		79
+#define R9A08G045_TSU_PRESETN		80
+#define R9A08G045_OCTA_ARESETN		81
+#define R9A08G045_PDM0_PRESETNT		82
+#define R9A08G045_PCI_ARESETN		83
+#define R9A08G045_PCI_RST_B		84
+#define R9A08G045_PCI_RST_GP_B		85
+#define R9A08G045_PCI_RST_PS_B		86
+#define R9A08G045_PCI_RST_RSM_B		87
+#define R9A08G045_PCI_RST_CFG_B		88
+#define R9A08G045_PCI_RST_LOAD_B	89
+#define R9A08G045_SPDIF_RST		90
+#define R9A08G045_I3C_TRESETN		91
+#define R9A08G045_I3C_PRESETN		92
+#define R9A08G045_VBAT_BRESETN		93
+
+#endif /* __DT_BINDINGS_CLOCK_R9A08G045_CPG_H__ */
