Merge tag 'renesas-drivers-for-v6.16-tag2' of https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel into soc/drivers

Renesas driver updates for v6.16 (take two)

  - Cover all R-Car drivers in the ARM/RISC-V/RENESAS ARCHITECTURE
    maintainer entry,
  - Identify the Renesas RZ/V2N (R9A09G056) SoC.

* tag 'renesas-drivers-for-v6.16-tag2' of https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel:
  soc: renesas: rz-sysc: Add SoC identification for RZ/V2N SoC
  MAINTAINERS: Generalize ARM/RISC-V/RENESAS ARCHITECTURE

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

Author: arndb

MAINTAINERS

@@ -3063,10 +3063,10 @@ F:	arch/arm/include/debug/renesas-scif.S
 F:	arch/arm/mach-shmobile/
 F:	arch/arm64/boot/dts/renesas/
 F:	arch/riscv/boot/dts/renesas/
-F:	drivers/nvmem/rcar-efuse.c
 F:	drivers/pmdomain/renesas/
 F:	drivers/soc/renesas/
 F:	include/linux/soc/renesas/
+N:	rcar
 K:	\brenesas,
 
 ARM/RISCPC ARCHITECTURE

drivers/soc/renesas/Kconfig

@@ -396,6 +396,7 @@ config ARCH_R9A09G047
 config ARCH_R9A09G056
 	bool "ARM64 Platform support for RZ/V2N"
 	default y if ARCH_RENESAS
+	select SYS_R9A09G056
 	help
 	  This enables support for the Renesas RZ/V2N SoC variants.
 
@@ -445,6 +446,10 @@ config SYS_R9A09G047
 	bool "Renesas RZ/G3E System controller support" if COMPILE_TEST
 	select SYSC_RZ
 
+config SYS_R9A09G056
+	bool "Renesas RZ/V2N System controller support" if COMPILE_TEST
+	select SYSC_RZ
+
 config SYS_R9A09G057
 	bool "Renesas RZ/V2H System controller support" if COMPILE_TEST
 	select SYSC_RZ

drivers/soc/renesas/Makefile

@@ -8,6 +8,7 @@ obj-$(CONFIG_ARCH_R9A06G032)	+= r9a06g032-smp.o
 endif
 obj-$(CONFIG_SYSC_R9A08G045)	+= r9a08g045-sysc.o
 obj-$(CONFIG_SYS_R9A09G047)	+= r9a09g047-sys.o
+obj-$(CONFIG_SYS_R9A09G056)	+= r9a09g056-sys.o
 obj-$(CONFIG_SYS_R9A09G057)	+= r9a09g057-sys.o
 
 # Family

drivers/soc/renesas/r9a09g056-sys.c

@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * RZ/V2N System controller (SYS) driver
+ *
+ * Copyright (C) 2025 Renesas Electronics Corp.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include "rz-sysc.h"
+
+/* Register Offsets */
+#define SYS_LSI_MODE		0x300
+#define SYS_LSI_MODE_SEC_EN	BIT(16)
+/*
+ * BOOTPLLCA[1:0]
+ *	    [0,0] => 1.1GHZ
+ *	    [0,1] => 1.5GHZ
+ *	    [1,0] => 1.6GHZ
+ *	    [1,1] => 1.7GHZ
+ */
+#define SYS_LSI_MODE_STAT_BOOTPLLCA55	GENMASK(12, 11)
+#define SYS_LSI_MODE_CA55_1_7GHZ	0x3
+
+#define SYS_LSI_PRR			0x308
+#define SYS_LSI_PRR_GPU_DIS		BIT(0)
+#define SYS_LSI_PRR_ISP_DIS		BIT(4)
+
+#define SYS_RZV2N_FEATURE_G31		BIT(0)
+#define SYS_RZV2N_FEATURE_C55		BIT(1)
+#define SYS_RZV2N_FEATURE_SEC		BIT(2)
+
+static void rzv2n_sys_print_id(struct device *dev,
+			       void __iomem *sysc_base,
+			       struct soc_device_attribute *soc_dev_attr)
+{
+	u32 prr_val, mode_val;
+	u8 feature_flags;
+
+	prr_val = readl(sysc_base + SYS_LSI_PRR);
+	mode_val = readl(sysc_base + SYS_LSI_MODE);
+
+	/* Check GPU, ISP and Cryptographic configuration */
+	feature_flags = !(prr_val & SYS_LSI_PRR_GPU_DIS) ? SYS_RZV2N_FEATURE_G31 : 0;
+	feature_flags |= !(prr_val & SYS_LSI_PRR_ISP_DIS) ? SYS_RZV2N_FEATURE_C55 : 0;
+	feature_flags |= (mode_val & SYS_LSI_MODE_SEC_EN) ? SYS_RZV2N_FEATURE_SEC : 0;
+
+	dev_info(dev, "Detected Renesas %s %sn%d Rev %s%s%s%s%s\n", soc_dev_attr->family,
+		 soc_dev_attr->soc_id, 41 + feature_flags, soc_dev_attr->revision,
+		 feature_flags ?  " with" : "",
+		 feature_flags & SYS_RZV2N_FEATURE_G31 ? " GE3D (Mali-G31)" : "",
+		 feature_flags & SYS_RZV2N_FEATURE_SEC ? " Cryptographic engine" : "",
+		 feature_flags & SYS_RZV2N_FEATURE_C55 ? " ISP (Mali-C55)" : "");
+
+	/* Check CA55 PLL configuration */
+	if (FIELD_GET(SYS_LSI_MODE_STAT_BOOTPLLCA55, mode_val) != SYS_LSI_MODE_CA55_1_7GHZ)
+		dev_warn(dev, "CA55 PLL is not set to 1.7GHz\n");
+}
+
+static const struct rz_sysc_soc_id_init_data rzv2n_sys_soc_id_init_data __initconst = {
+	.family = "RZ/V2N",
+	.id = 0x867d447,
+	.devid_offset = 0x304,
+	.revision_mask = GENMASK(31, 28),
+	.specific_id_mask = GENMASK(27, 0),
+	.print_id = rzv2n_sys_print_id,
+};
+
+const struct rz_sysc_init_data rzv2n_sys_init_data = {
+	.soc_id_init_data = &rzv2n_sys_soc_id_init_data,
+};

drivers/soc/renesas/rz-sysc.c

@@ -88,6 +88,9 @@ static const struct of_device_id rz_sysc_match[] = {
 #ifdef CONFIG_SYS_R9A09G047
 	{ .compatible = "renesas,r9a09g047-sys", .data = &rzg3e_sys_init_data },
 #endif
+#ifdef CONFIG_SYS_R9A09G056
+	{ .compatible = "renesas,r9a09g056-sys", .data = &rzv2n_sys_init_data },
+#endif
 #ifdef CONFIG_SYS_R9A09G057
 	{ .compatible = "renesas,r9a09g057-sys", .data = &rzv2h_sys_init_data },
 #endif

drivers/soc/renesas/rz-sysc.h

@@ -42,5 +42,6 @@ struct rz_sysc_init_data {
 extern const struct rz_sysc_init_data rzg3e_sys_init_data;
 extern const struct rz_sysc_init_data rzg3s_sysc_init_data;
 extern const struct rz_sysc_init_data rzv2h_sys_init_data;
+extern const struct rz_sysc_init_data rzv2n_sys_init_data;
 
 #endif /* __SOC_RENESAS_RZ_SYSC_H__ */