diff mbox series

[05/15] soc: renesas: sysc: Add SoC identification for RZ/V2N SoC

Message ID 20250326143945.82142-6-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive)
State New
Delegated to: Geert Uytterhoeven
Headers show
Series Add support for Renesas RZ/V2N SoC and EVK | expand

Commit Message

Prabhakar March 26, 2025, 2:39 p.m. UTC 
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Add SoC identification for the RZ/V2N SoC using the System Controller
(SYS) block.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/soc/renesas/Kconfig         |   5 ++
 drivers/soc/renesas/Makefile        |   1 +
 drivers/soc/renesas/r9a09g056-sys.c | 107 ++++++++++++++++++++++++++++
 drivers/soc/renesas/rz-sysc.c       |   3 +
 drivers/soc/renesas/rz-sysc.h       |   1 +
 5 files changed, 117 insertions(+)
 create mode 100644 drivers/soc/renesas/r9a09g056-sys.c
diff mbox series

Patch

diff --git a/drivers/soc/renesas/Kconfig b/drivers/soc/renesas/Kconfig
index 764aba6d1ae6..14888db23556 100644
--- a/drivers/soc/renesas/Kconfig
+++ b/drivers/soc/renesas/Kconfig
@@ -354,6 +354,7 @@  config ARCH_R9A09G047
 
 config ARCH_R9A09G056
 	bool "ARM64 Platform support for RZ/V2N"
+	select SYS_R9A09G056
 	help
 	  This enables support for the Renesas RZ/V2N SoC variants.
 
@@ -402,6 +403,10 @@  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
diff --git a/drivers/soc/renesas/Makefile b/drivers/soc/renesas/Makefile
index 81d4c5726e4c..3bdcc6a395d5 100644
--- a/drivers/soc/renesas/Makefile
+++ b/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
diff --git a/drivers/soc/renesas/r9a09g056-sys.c b/drivers/soc/renesas/r9a09g056-sys.c
new file mode 100644
index 000000000000..3bea674c785e
--- /dev/null
+++ b/drivers/soc/renesas/r9a09g056-sys.c
@@ -0,0 +1,107 @@ 
+// 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 <linux/string.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)
+{
+	unsigned int part_number;
+	char features[75] = "";
+	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;
+
+	part_number = 41;
+	if (feature_flags & SYS_RZV2N_FEATURE_G31)
+		part_number++;
+	if (feature_flags & SYS_RZV2N_FEATURE_C55)
+		part_number += 2;
+	if (feature_flags & SYS_RZV2N_FEATURE_SEC)
+		part_number += 4;
+
+	if (feature_flags) {
+		unsigned int features_len = sizeof(features);
+
+		strscpy(features, "with ");
+		if (feature_flags & SYS_RZV2N_FEATURE_G31)
+			strlcat(features, "GE3D (Mali-G31)", features_len);
+
+		if (feature_flags == (SYS_RZV2N_FEATURE_G31 |
+				      SYS_RZV2N_FEATURE_C55 |
+				      SYS_RZV2N_FEATURE_SEC))
+			strlcat(features, ", ", features_len);
+		else if ((feature_flags & SYS_RZV2N_FEATURE_G31) &&
+			 (feature_flags & (SYS_RZV2N_FEATURE_C55 | SYS_RZV2N_FEATURE_SEC)))
+			strlcat(features, " and ", features_len);
+
+		if (feature_flags & SYS_RZV2N_FEATURE_SEC)
+			strlcat(features, "Cryptographic engine", features_len);
+
+		if ((feature_flags & SYS_RZV2N_FEATURE_SEC) &&
+		    (feature_flags & SYS_RZV2N_FEATURE_C55))
+			strlcat(features, " and ", features_len);
+
+		if (feature_flags & SYS_RZV2N_FEATURE_C55)
+			strlcat(features, "ISP (Mali-C55)", features_len);
+	}
+	dev_info(dev, "Detected Renesas %s %sn%d Rev %s %s\n", soc_dev_attr->family,
+		 soc_dev_attr->soc_id, part_number, soc_dev_attr->revision, features);
+
+	/* 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,
+};
diff --git a/drivers/soc/renesas/rz-sysc.c b/drivers/soc/renesas/rz-sysc.c
index 14db508f669f..ffa65fb4dade 100644
--- a/drivers/soc/renesas/rz-sysc.c
+++ b/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
diff --git a/drivers/soc/renesas/rz-sysc.h b/drivers/soc/renesas/rz-sysc.h
index aa83948c5117..56bc047a1bff 100644
--- a/drivers/soc/renesas/rz-sysc.h
+++ b/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__ */