[PATCH 6.12.y-cip 20/39] clk: renesas: Add support for RZ/G3L SoC

From: Biju Das <[email protected]>

[ Upstream commit 77894661c00ab99053c9606f0f7ec673065f86ac ]

The clock structure for RZ/G3L is almost identical to that of the RZ/G3S
SoC with more IP blocks such as LCDC, CRU, LVDS, and GPU.

Add minimal clock and reset entries required to boot the system on
Renesas RZ/G3L SMARC EVK and bind it with the RZ/G2L CPG core driver.

Signed-off-by: Biju Das <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Biju Das <[email protected]>
---
 drivers/clk/renesas/Kconfig         |   7 +-
 drivers/clk/renesas/Makefile        |   1 +
 drivers/clk/renesas/r9a08g046-cpg.c | 153 ++++++++++++++++++++++++++++
 drivers/clk/renesas/rzg2l-cpg.c     |   6 ++
 drivers/clk/renesas/rzg2l-cpg.h     |   1 +
 5 files changed, 167 insertions(+), 1 deletion(-)
 create mode 100644 drivers/clk/renesas/r9a08g046-cpg.c

diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig
index 6a5a04664990..0203ecbb3882 100644
--- a/drivers/clk/renesas/Kconfig
+++ b/drivers/clk/renesas/Kconfig
@@ -39,6 +39,7 @@ config CLK_RENESAS
 	select CLK_R9A07G044 if ARCH_R9A07G044
 	select CLK_R9A07G054 if ARCH_R9A07G054
 	select CLK_R9A08G045 if ARCH_R9A08G045
+	select CLK_R9A08G046 if ARCH_R9A08G046
 	select CLK_R9A09G011 if ARCH_R9A09G011
 	select CLK_R9A09G047 if ARCH_R9A09G047
 	select CLK_R9A09G056 if ARCH_R9A09G056
@@ -194,6 +195,10 @@ config CLK_R9A08G045
 	bool "RZ/G3S clock support" if COMPILE_TEST
 	select CLK_RZG2L
 
+config CLK_R9A08G046
+	bool "RZ/G3L clock support" if COMPILE_TEST
+	select CLK_RZG2L
+
 config CLK_R9A09G011
 	bool "RZ/V2M clock support" if COMPILE_TEST
 	select CLK_RZG2L
@@ -250,7 +255,7 @@ config CLK_RCAR_USB2_CLOCK_SEL
 	  This is a driver for R-Car USB2 clock selector
 
 config CLK_RZG2L
-	bool "RZ/{G2L,G2UL,G3S,V2L} family clock support" if COMPILE_TEST
+	bool "RZ/{G2{L,UL},G3{S,L},V2L} family clock support" if COMPILE_TEST
 	select RESET_CONTROLLER
 
 config CLK_RZV2H
diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
index d28eb276a153..bd2bed91ab29 100644
--- a/drivers/clk/renesas/Makefile
+++ b/drivers/clk/renesas/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_CLK_R9A07G043)		+= r9a07g043-cpg.o
 obj-$(CONFIG_CLK_R9A07G044)		+= r9a07g044-cpg.o
 obj-$(CONFIG_CLK_R9A07G054)		+= r9a07g044-cpg.o
 obj-$(CONFIG_CLK_R9A08G045)		+= r9a08g045-cpg.o
+obj-$(CONFIG_CLK_R9A08G046)		+= r9a08g046-cpg.o
 obj-$(CONFIG_CLK_R9A09G011)		+= r9a09g011-cpg.o
 obj-$(CONFIG_CLK_R9A09G047)		+= r9a09g047-cpg.o
 obj-$(CONFIG_CLK_R9A09G056)		+= r9a09g056-cpg.o
diff --git a/drivers/clk/renesas/r9a08g046-cpg.c b/drivers/clk/renesas/r9a08g046-cpg.c
new file mode 100644
index 000000000000..6759957980f2
--- /dev/null
+++ b/drivers/clk/renesas/r9a08g046-cpg.c
@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * RZ/G3L CPG driver
+ *
+ * Copyright (C) 2026 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,r9a08g046-cpg.h>
+
+#include "rzg2l-cpg.h"
+
+/* RZ/G3L Specific registers. */
+#define G3L_CPG_PL2_DDIV		(0x204)
+#define G3L_CPG_PL3_DDIV		(0x208)
+#define G3L_CLKDIVSTATUS		(0x280)
+
+/* RZ/G3L Specific division configuration.  */
+#define G3L_DIVPL2A		DDIV_PACK(G3L_CPG_PL2_DDIV, 0, 2)
+#define G3L_DIVPL2B		DDIV_PACK(G3L_CPG_PL2_DDIV, 4, 2)
+#define G3L_DIVPL3A		DDIV_PACK(G3L_CPG_PL3_DDIV, 0, 2)
+
+/* RZ/G3L Clock status configuration. */
+#define G3L_DIVPL2A_STS		DDIV_PACK(G3L_CLKDIVSTATUS, 4, 1)
+#define G3L_DIVPL2B_STS		DDIV_PACK(G3L_CLKDIVSTATUS, 5, 1)
+#define G3L_DIVPL3A_STS		DDIV_PACK(G3L_CLKDIVSTATUS, 8, 1)
+
+enum clk_ids {
+	/* Core Clock Outputs exported to DT */
+	LAST_DT_CORE_CLK = R9A08G046_USB_SCLK,
+
+	/* External Input Clocks */
+	CLK_EXTAL,
+	CLK_ETH0_TXC_TX_CLK_IN,
+	CLK_ETH0_RXC_RX_CLK_IN,
+	CLK_ETH1_TXC_TX_CLK_IN,
+	CLK_ETH1_RXC_RX_CLK_IN,
+
+	/* Internal Core Clocks */
+	CLK_PLL2,
+	CLK_PLL2_DIV2,
+	CLK_PLL3,
+	CLK_PLL3_DIV2,
+
+	/* Module Clocks */
+	MOD_CLK_BASE,
+};
+
+/* Divider tables */
+static const struct clk_div_table dtable_4_128[] = {
+	{ 0, 4 },
+	{ 1, 8 },
+	{ 2, 16 },
+	{ 3, 128 },
+	{ 0, 0 },
+};
+
+static const struct clk_div_table dtable_8_256[] = {
+	{ 0, 8 },
+	{ 1, 16 },
+	{ 2, 32 },
+	{ 3, 256 },
+	{ 0, 0 },
+};
+
+static const struct cpg_core_clk r9a08g046_core_clks[] __initconst = {
+	/* External Clock Inputs */
+	DEF_INPUT("extal", CLK_EXTAL),
+	DEF_INPUT("eth0_txc_tx_clk", CLK_ETH0_TXC_TX_CLK_IN),
+	DEF_INPUT("eth0_rxc_rx_clk", CLK_ETH0_RXC_RX_CLK_IN),
+	DEF_INPUT("eth1_txc_tx_clk", CLK_ETH1_TXC_TX_CLK_IN),
+	DEF_INPUT("eth1_rxc_rx_clk", CLK_ETH1_RXC_RX_CLK_IN),
+
+	/* Internal Core Clocks */
+	DEF_FIXED(".pll2", CLK_PLL2, CLK_EXTAL, 200, 3),
+	DEF_FIXED(".pll3", CLK_PLL3, CLK_EXTAL, 200, 3),
+	DEF_FIXED(".pll2_div2", CLK_PLL2_DIV2, CLK_PLL2, 1, 2),
+	DEF_FIXED(".pll3_div2", CLK_PLL3_DIV2, CLK_PLL3, 1, 2),
+
+	/* Core output clk */
+	DEF_G3S_DIV("P0", R9A08G046_CLK_P0, CLK_PLL2_DIV2, G3L_DIVPL2B, G3L_DIVPL2B_STS,
+		    dtable_8_256, 0, 0, 0, NULL),
+	DEF_G3S_DIV("P1", R9A08G046_CLK_P1, CLK_PLL3_DIV2, G3L_DIVPL3A, G3L_DIVPL3A_STS,
+		    dtable_4_128, 0, 0, 0, NULL),
+	DEF_G3S_DIV("P3", R9A08G046_CLK_P3, CLK_PLL2_DIV2, G3L_DIVPL2A, G3L_DIVPL2A_STS,
+		    dtable_4_128, 0, 0, 0, NULL),
+};
+
+static const struct rzg2l_mod_clk r9a08g046_mod_clks[] = {
+	DEF_MOD("gic_gicclk",		R9A08G046_GIC600_GICCLK, R9A08G046_CLK_P1, 0x514, 0,
+					MSTOP(BUS_PERI_COM, BIT(12))),
+	DEF_MOD("ia55_pclk",		R9A08G046_IA55_PCLK, R9A08G046_CLK_P0, 0x518, 0,
+					MSTOP(BUS_PERI_CPU, BIT(13))),
+	DEF_MOD("ia55_clk",		R9A08G046_IA55_CLK, R9A08G046_CLK_P1, 0x518, 1,
+					MSTOP(BUS_PERI_CPU, BIT(13))),
+	DEF_MOD("dmac_aclk",		R9A08G046_DMAC_ACLK, R9A08G046_CLK_P3, 0x52c, 0,
+					MSTOP(BUS_REG1, BIT(2))),
+	DEF_MOD("dmac_pclk",		R9A08G046_DMAC_PCLK, R9A08G046_CLK_P3, 0x52c, 1,
+					MSTOP(BUS_REG1, BIT(3))),
+	DEF_MOD("scif0_clk_pck",	R9A08G046_SCIF0_CLK_PCK, R9A08G046_CLK_P0, 0x584, 0,
+					MSTOP(BUS_MCPU2, BIT(1))),
+};
+
+static const struct rzg2l_reset r9a08g046_resets[] = {
+	DEF_RST(R9A08G046_GIC600_GICRESET_N, 0x814, 0),
+	DEF_RST(R9A08G046_GIC600_DBG_GICRESET_N, 0x814, 1),
+	DEF_RST(R9A08G046_IA55_RESETN, 0x818, 0),
+	DEF_RST(R9A08G046_DMAC_ARESETN, 0x82c, 0),
+	DEF_RST(R9A08G046_DMAC_RST_ASYNC, 0x82c, 1),
+	DEF_RST(R9A08G046_SCIF0_RST_SYSTEM_N, 0x884, 0),
+};
+
+static const unsigned int r9a08g046_crit_mod_clks[] __initconst = {
+	MOD_CLK_BASE + R9A08G046_GIC600_GICCLK,
+	MOD_CLK_BASE + R9A08G046_IA55_CLK,
+	MOD_CLK_BASE + R9A08G046_DMAC_ACLK,
+};
+
+static const unsigned int r9a08g046_crit_resets[] = {
+	R9A08G046_DMAC_ARESETN,
+	R9A08G046_DMAC_RST_ASYNC,
+};
+
+const struct rzg2l_cpg_info r9a08g046_cpg_info = {
+	/* Core Clocks */
+	.core_clks = r9a08g046_core_clks,
+	.num_core_clks = ARRAY_SIZE(r9a08g046_core_clks),
+	.last_dt_core_clk = LAST_DT_CORE_CLK,
+	.num_total_core_clks = MOD_CLK_BASE,
+
+	/* Critical Module Clocks */
+	.crit_mod_clks = r9a08g046_crit_mod_clks,
+	.num_crit_mod_clks = ARRAY_SIZE(r9a08g046_crit_mod_clks),
+
+	/* Module Clocks */
+	.mod_clks = r9a08g046_mod_clks,
+	.num_mod_clks = ARRAY_SIZE(r9a08g046_mod_clks),
+	.num_hw_mod_clks = R9A08G046_BSC_X_BCK_BSC + 1,
+
+	/* Resets */
+	.resets = r9a08g046_resets,
+	.num_resets = R9A08G046_BSC_X_PRESET_BSC + 1, /* Last reset ID + 1 */
+
+	/* Critical Resets */
+	.crit_resets = r9a08g046_crit_resets,
+	.num_crit_resets = ARRAY_SIZE(r9a08g046_crit_resets),
+
+	.has_clk_mon_regs = true,
+};
diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c
index 3e41ed90a7eb..5ced73696efa 100644
--- a/drivers/clk/renesas/rzg2l-cpg.c
+++ b/drivers/clk/renesas/rzg2l-cpg.c
@@ -2153,6 +2153,12 @@ static const struct of_device_id rzg2l_cpg_match[] = {
 		.data = &r9a08g045_cpg_info,
 	},
 #endif
+#ifdef CONFIG_CLK_R9A08G046
+	{
+		.compatible = "renesas,r9a08g046-cpg",
+		.data = &r9a08g046_cpg_info,
+	},
+#endif
 #ifdef CONFIG_CLK_R9A09G011
 	{
 		.compatible = "renesas,r9a09g011-cpg",
diff --git a/drivers/clk/renesas/rzg2l-cpg.h b/drivers/clk/renesas/rzg2l-cpg.h
index af0a003d93f7..10baf9e71a6e 100644
--- a/drivers/clk/renesas/rzg2l-cpg.h
+++ b/drivers/clk/renesas/rzg2l-cpg.h
@@ -316,6 +316,7 @@ extern const struct rzg2l_cpg_info r9a07g043_cpg_info;
 extern const struct rzg2l_cpg_info r9a07g044_cpg_info;
 extern const struct rzg2l_cpg_info r9a07g054_cpg_info;
 extern const struct rzg2l_cpg_info r9a08g045_cpg_info;
+extern const struct rzg2l_cpg_info r9a08g046_cpg_info;
 extern const struct rzg2l_cpg_info r9a09g011_cpg_info;
 
 int rzg2l_cpg_sd_clk_mux_notifier(struct notifier_block *nb, unsigned long event, void *data);
-- 
2.43.0