[PATCH 03/10] pmdomain: renesas: rcar-sys: Add r8a774a3 support
From: Ayman Chaudhry
Date: Fri Aug 21 2026 - 11:05:53 EST
Add support for Renesas RZ/G2M v3.0 (a.k.a. R8A774A3) SoC power areas
to the R-Car SYSC driver. The RZ/G2M v3.0 SYSC is similar to the RZ/G2M
v1.3 SYSC, however it lacks the A2VC0 power area.
Signed-off-by: Ayman Chaudhry <ayman.chaudhry.kc@xxxxxxxxxxx>
---
drivers/pmdomain/renesas/Kconfig | 4 +++
drivers/pmdomain/renesas/Makefile | 1 +
drivers/pmdomain/renesas/r8a774a3-sysc.c | 45 ++++++++++++++++++++++++
drivers/pmdomain/renesas/rcar-sysc.c | 3 ++
drivers/pmdomain/renesas/rcar-sysc.h | 1 +
5 files changed, 54 insertions(+)
create mode 100644 drivers/pmdomain/renesas/r8a774a3-sysc.c
diff --git a/drivers/pmdomain/renesas/Kconfig b/drivers/pmdomain/renesas/Kconfig
index f2f52d3c29a0..df19b95c4655 100644
--- a/drivers/pmdomain/renesas/Kconfig
+++ b/drivers/pmdomain/renesas/Kconfig
@@ -37,6 +37,10 @@ config SYSC_R8A774A1
bool "System Controller support for R8A774A1 (RZ/G2M)" if COMPILE_TEST
select SYSC_RCAR
+config SYSC_R8A774A3
+ bool "System Controller support for R8A774A3 (RZ/G2M v3.0)" if COMPILE_TEST
+ select SYSC_RCAR
+
config SYSC_R8A774B1
bool "System Controller support for R8A774B1 (RZ/G2N)" if COMPILE_TEST
select SYSC_RCAR
diff --git a/drivers/pmdomain/renesas/Makefile b/drivers/pmdomain/renesas/Makefile
index 17849aad37a5..8eda820478e4 100644
--- a/drivers/pmdomain/renesas/Makefile
+++ b/drivers/pmdomain/renesas/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_SYSC_R8A7743) += r8a7743-sysc.o
obj-$(CONFIG_SYSC_R8A7745) += r8a7745-sysc.o
obj-$(CONFIG_SYSC_R8A77470) += r8a77470-sysc.o
obj-$(CONFIG_SYSC_R8A774A1) += r8a774a1-sysc.o
+obj-$(CONFIG_SYSC_R8A774A3) += r8a774a3-sysc.o
obj-$(CONFIG_SYSC_R8A774B1) += r8a774b1-sysc.o
obj-$(CONFIG_SYSC_R8A774C0) += r8a774c0-sysc.o
obj-$(CONFIG_SYSC_R8A774E1) += r8a774e1-sysc.o
diff --git a/drivers/pmdomain/renesas/r8a774a3-sysc.c b/drivers/pmdomain/renesas/r8a774a3-sysc.c
new file mode 100644
index 000000000000..7c8160e09cf3
--- /dev/null
+++ b/drivers/pmdomain/renesas/r8a774a3-sysc.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas RZ/G2M v3.0 System Controller
+ * Copyright (C) 2026 Renesas Electronics Corp.
+ *
+ * Based on Renesas R-Car M3-W System Controller
+ * Copyright (C) 2016 Glider bvba
+ */
+
+#include <linux/kernel.h>
+
+#include <dt-bindings/power/r8a774a3-sysc.h>
+
+#include "rcar-sysc.h"
+
+static const struct rcar_sysc_area r8a774a3_areas[] __initconst = {
+ { "always-on", 0, 0, R8A774A3_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
+ { "ca57-scu", 0x1c0, 0, R8A774A3_PD_CA57_SCU, R8A774A3_PD_ALWAYS_ON,
+ PD_SCU },
+ { "ca57-cpu0", 0x80, 0, R8A774A3_PD_CA57_CPU0, R8A774A3_PD_CA57_SCU,
+ PD_CPU_NOCR },
+ { "ca57-cpu1", 0x80, 1, R8A774A3_PD_CA57_CPU1, R8A774A3_PD_CA57_SCU,
+ PD_CPU_NOCR},
+ { "ca53-scu", 0x140, 0, R8A774A3_PD_CA53_SCU, R8A774A3_PD_ALWAYS_ON,
+ PD_SCU },
+ { "ca53-cpu0", 0x200, 0, R8A774A3_PD_CA53_CPU0, R8A774A3_PD_CA53_SCU,
+ PD_CPU_NOCR },
+ { "ca53-cpu1", 0x200, 1, R8A774A3_PD_CA53_CPU1, R8A774A3_PD_CA53_SCU,
+ PD_CPU_NOCR },
+ { "ca53-cpu2", 0x200, 2, R8A774A3_PD_CA53_CPU2, R8A774A3_PD_CA53_SCU,
+ PD_CPU_NOCR },
+ { "ca53-cpu3", 0x200, 3, R8A774A3_PD_CA53_CPU3, R8A774A3_PD_CA53_SCU,
+ PD_CPU_NOCR },
+ { "a3vc", 0x380, 0, R8A774A3_PD_A3VC, R8A774A3_PD_ALWAYS_ON },
+ { "a2vc1", 0x3c0, 1, R8A774A3_PD_A2VC1, R8A774A3_PD_A3VC },
+ { "3dg-a", 0x100, 0, R8A774A3_PD_3DG_A, R8A774A3_PD_ALWAYS_ON },
+ { "3dg-b", 0x100, 1, R8A774A3_PD_3DG_B, R8A774A3_PD_3DG_A },
+};
+
+const struct rcar_sysc_info r8a774a3_sysc_info __initconst = {
+ .areas = r8a774a3_areas,
+ .num_areas = ARRAY_SIZE(r8a774a3_areas),
+ .extmask_offs = 0x2f8,
+ .extmask_val = BIT(0),
+};
diff --git a/drivers/pmdomain/renesas/rcar-sysc.c b/drivers/pmdomain/renesas/rcar-sysc.c
index bd7bb9cbd9da..3c8a44c6d772 100644
--- a/drivers/pmdomain/renesas/rcar-sysc.c
+++ b/drivers/pmdomain/renesas/rcar-sysc.c
@@ -284,6 +284,9 @@ static const struct of_device_id rcar_sysc_matches[] __initconst = {
#ifdef CONFIG_SYSC_R8A774A1
{ .compatible = "renesas,r8a774a1-sysc", .data = &r8a774a1_sysc_info },
#endif
+#ifdef CONFIG_SYSC_R8A774A3
+ { .compatible = "renesas,r8a774a3-sysc", .data = &r8a774a3_sysc_info },
+#endif
#ifdef CONFIG_SYSC_R8A774B1
{ .compatible = "renesas,r8a774b1-sysc", .data = &r8a774b1_sysc_info },
#endif
diff --git a/drivers/pmdomain/renesas/rcar-sysc.h b/drivers/pmdomain/renesas/rcar-sysc.h
index 07ffce310686..9e93a1f98f68 100644
--- a/drivers/pmdomain/renesas/rcar-sysc.h
+++ b/drivers/pmdomain/renesas/rcar-sysc.h
@@ -55,6 +55,7 @@ extern const struct rcar_sysc_info r8a7743_sysc_info;
extern const struct rcar_sysc_info r8a7745_sysc_info;
extern const struct rcar_sysc_info r8a77470_sysc_info;
extern const struct rcar_sysc_info r8a774a1_sysc_info;
+extern const struct rcar_sysc_info r8a774a3_sysc_info;
extern const struct rcar_sysc_info r8a774b1_sysc_info;
extern const struct rcar_sysc_info r8a774c0_sysc_info;
extern const struct rcar_sysc_info r8a774e1_sysc_info;
--
2.34.1