clk: renesas: rzv2h: Add support for RZ/G3E SoC

The clock structure for RZ/G3E is almost identical to RZ/V2H SoC with
more IP blocks compared to RZ/V2H. For eg: VSPI, LVDS, DPI and LCDC1
are present only on the RZ/G3E SoC.

Add minimal clock and reset entries required to boot the Renesas RZ/G3E
SMARC EVK and binds it with the RZ/V2H CPG core driver.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/20241213123550.289193-3-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: bijudas

drivers/clk/renesas/Kconfig

@@ -40,6 +40,7 @@ config CLK_RENESAS
 	select CLK_R9A07G054 if ARCH_R9A07G054
 	select CLK_R9A08G045 if ARCH_R9A08G045
 	select CLK_R9A09G011 if ARCH_R9A09G011
+	select CLK_R9A09G047 if ARCH_R9A09G047
 	select CLK_R9A09G057 if ARCH_R9A09G057
 	select CLK_SH73A0 if ARCH_SH73A0
 
@@ -194,6 +195,10 @@ config CLK_R9A09G011
 	bool "RZ/V2M clock support" if COMPILE_TEST
 	select CLK_RZG2L
 
+config CLK_R9A09G047
+       bool "RZ/G3E clock support" if COMPILE_TEST
+       select CLK_RZV2H
+
 config CLK_R9A09G057
        bool "RZ/V2H(P) clock support" if COMPILE_TEST
        select CLK_RZV2H
@@ -234,7 +239,7 @@ config CLK_RZG2L
 	select RESET_CONTROLLER
 
 config CLK_RZV2H
-	bool "RZ/V2H(P) family clock support" if COMPILE_TEST
+	bool "RZ/{G3E,V2H(P)} family clock support" if COMPILE_TEST
 	select RESET_CONTROLLER
 
 config CLK_RENESAS_VBATTB

drivers/clk/renesas/Makefile

@@ -37,6 +37,7 @@ obj-$(CONFIG_CLK_R9A07G044)		+= r9a07g044-cpg.o
 obj-$(CONFIG_CLK_R9A07G054)		+= r9a07g044-cpg.o
 obj-$(CONFIG_CLK_R9A08G045)		+= r9a08g045-cpg.o
 obj-$(CONFIG_CLK_R9A09G011)		+= r9a09g011-cpg.o
+obj-$(CONFIG_CLK_R9A09G047)		+= r9a09g047-cpg.o
 obj-$(CONFIG_CLK_R9A09G057)		+= r9a09g057-cpg.o
 obj-$(CONFIG_CLK_SH73A0)		+= clk-sh73a0.o
 

drivers/clk/renesas/r9a09g047-cpg.c

@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas RZ/G3E CPG driver
+ *
+ * Copyright (C) 2024 Renesas Electronics Corp.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <dt-bindings/clock/renesas,r9a09g047-cpg.h>
+
+#include "rzv2h-cpg.h"
+
+enum clk_ids {
+	/* Core Clock Outputs exported to DT */
+	LAST_DT_CORE_CLK = R9A09G047_IOTOP_0_SHCLK,
+
+	/* External Input Clocks */
+	CLK_AUDIO_EXTAL,
+	CLK_RTXIN,
+	CLK_QEXTAL,
+
+	/* PLL Clocks */
+	CLK_PLLCM33,
+	CLK_PLLDTY,
+	CLK_PLLCA55,
+
+	/* Internal Core Clocks */
+	CLK_PLLCM33_DIV16,
+	CLK_PLLDTY_ACPU,
+	CLK_PLLDTY_ACPU_DIV4,
+
+	/* Module Clocks */
+	MOD_CLK_BASE,
+};
+
+static const struct clk_div_table dtable_2_64[] = {
+	{0, 2},
+	{1, 4},
+	{2, 8},
+	{3, 16},
+	{4, 64},
+	{0, 0},
+};
+
+static const struct cpg_core_clk r9a09g047_core_clks[] __initconst = {
+	/* External Clock Inputs */
+	DEF_INPUT("audio_extal", CLK_AUDIO_EXTAL),
+	DEF_INPUT("rtxin", CLK_RTXIN),
+	DEF_INPUT("qextal", CLK_QEXTAL),
+
+	/* PLL Clocks */
+	DEF_FIXED(".pllcm33", CLK_PLLCM33, CLK_QEXTAL, 200, 3),
+	DEF_FIXED(".plldty", CLK_PLLDTY, CLK_QEXTAL, 200, 3),
+	DEF_PLL(".pllca55", CLK_PLLCA55, CLK_QEXTAL, PLL_CONF(0x64)),
+
+	/* Internal Core Clocks */
+	DEF_FIXED(".pllcm33_div16", CLK_PLLCM33_DIV16, CLK_PLLCM33, 1, 16),
+
+	DEF_DDIV(".plldty_acpu", CLK_PLLDTY_ACPU, CLK_PLLDTY, CDDIV0_DIVCTL2, dtable_2_64),
+	DEF_FIXED(".plldty_acpu_div4", CLK_PLLDTY_ACPU_DIV4, CLK_PLLDTY_ACPU, 1, 4),
+
+	/* Core Clocks */
+	DEF_FIXED("sys_0_pclk", R9A09G047_SYS_0_PCLK, CLK_QEXTAL, 1, 1),
+	DEF_FIXED("iotop_0_shclk", R9A09G047_IOTOP_0_SHCLK, CLK_PLLCM33_DIV16, 1, 1),
+};
+
+static const struct rzv2h_mod_clk r9a09g047_mod_clks[] __initconst = {
+	DEF_MOD_CRITICAL("gic_0_gicclk",	CLK_PLLDTY_ACPU_DIV4, 1, 3, 0, 19,
+						BUS_MSTOP(3, BIT(5))),
+	DEF_MOD("scif_0_clk_pck",		CLK_PLLCM33_DIV16, 8, 15, 4, 15,
+						BUS_MSTOP(3, BIT(14))),
+};
+
+static const struct rzv2h_reset r9a09g047_resets[] __initconst = {
+	DEF_RST(3, 0, 1, 1),		/* SYS_0_PRESETN */
+	DEF_RST(3, 8, 1, 9),		/* GIC_0_GICRESET_N */
+	DEF_RST(3, 9, 1, 10),		/* GIC_0_DBG_GICRESET_N */
+	DEF_RST(9, 5, 4, 6),		/* SCIF_0_RST_SYSTEM_N */
+};
+
+const struct rzv2h_cpg_info r9a09g047_cpg_info __initconst = {
+	/* Core Clocks */
+	.core_clks = r9a09g047_core_clks,
+	.num_core_clks = ARRAY_SIZE(r9a09g047_core_clks),
+	.last_dt_core_clk = LAST_DT_CORE_CLK,
+	.num_total_core_clks = MOD_CLK_BASE,
+
+	/* Module Clocks */
+	.mod_clks = r9a09g047_mod_clks,
+	.num_mod_clks = ARRAY_SIZE(r9a09g047_mod_clks),
+	.num_hw_mod_clks = 28 * 16,
+
+	/* Resets */
+	.resets = r9a09g047_resets,
+	.num_resets = ARRAY_SIZE(r9a09g047_resets),
+
+	.num_mstop_bits = 208,
+};

drivers/clk/renesas/rzv2h-cpg.c

@@ -972,6 +972,12 @@ static const struct of_device_id rzv2h_cpg_match[] = {
 		.compatible = "renesas,r9a09g057-cpg",
 		.data = &r9a09g057_cpg_info,
 	},
+#endif
+#ifdef CONFIG_CLK_R9A09G047
+	{
+		.compatible = "renesas,r9a09g047-cpg",
+		.data = &r9a09g047_cpg_info,
+	},
 #endif
 	{ /* sentinel */ }
 };

drivers/clk/renesas/rzv2h-cpg.h

@@ -218,6 +218,7 @@ struct rzv2h_cpg_info {
 	unsigned int num_mstop_bits;
 };
 
+extern const struct rzv2h_cpg_info r9a09g047_cpg_info;
 extern const struct rzv2h_cpg_info r9a09g057_cpg_info;
 
 #endif	/* __RENESAS_RZV2H_CPG_H__ */