soc: renesas: rcar-sysc: Add r8a77470 support

Add support for RZ/G1C (R8A77470) SoC power areas to the R-Car SYSC
driver.

Signed-off-by: Biju Das <[e-mail]>
Reviewed-by: Fabrizio Castro <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Simon Horman <[e-mail]>

Documentation/devicetree/bindings/power/renesas,rcar-sysc.txt

···
   - compatible: Must contain exactly one of the following:
       - "renesas,r8a7743-sysc" (RZ/G1M)
       - "renesas,r8a7745-sysc" (RZ/G1E)
+      - "renesas,r8a77470-sysc" (RZ/G1C)
       - "renesas,r8a7779-sysc" (R-Car H1)
       - "renesas,r8a7790-sysc" (R-Car H2)
       - "renesas,r8a7791-sysc" (R-Car M2-W)

drivers/soc/renesas/Kconfig

···
 			   ARCH_R8A77970 || ARCH_R8A77980 || ARCH_R8A77995
 	select SYSC_R8A7743 if ARCH_R8A7743
 	select SYSC_R8A7745 if ARCH_R8A7745
+	select SYSC_R8A77470 if ARCH_R8A77470
 	select SYSC_R8A7779 if ARCH_R8A7779
 	select SYSC_R8A7790 if ARCH_R8A7790
 	select SYSC_R8A7791 if ARCH_R8A7791 || ARCH_R8A7793
···
 
 config SYSC_R8A7745
 	bool "RZ/G1E System Controller support" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A77470
+	bool "RZ/G1C System Controller support" if COMPILE_TEST
 	select SYSC_RCAR
 
 config SYSC_R8A7779

drivers/soc/renesas/Makefile

···
 # SoC
 obj-$(CONFIG_SYSC_R8A7743)	+= r8a7743-sysc.o
 obj-$(CONFIG_SYSC_R8A7745)	+= r8a7745-sysc.o
+obj-$(CONFIG_SYSC_R8A77470)	+= r8a77470-sysc.o
 obj-$(CONFIG_SYSC_R8A7779)	+= r8a7779-sysc.o
 obj-$(CONFIG_SYSC_R8A7790)	+= r8a7790-sysc.o
 obj-$(CONFIG_SYSC_R8A7791)	+= r8a7791-sysc.o

drivers/soc/renesas/r8a77470-sysc.c

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas RZ/G1C System Controller
+ *
+ * Copyright (C) 2018 Renesas Electronics Corp.
+ */
+
+#include <linux/bug.h>
+#include <linux/kernel.h>
+
+#include <dt-bindings/power/r8a77470-sysc.h>
+
+#include "rcar-sysc.h"
+
+static const struct rcar_sysc_area r8a77470_areas[] __initconst = {
+	{ "always-on",	    0, 0, R8A77470_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
+	{ "ca7-scu",	0x100, 0, R8A77470_PD_CA7_SCU,	R8A77470_PD_ALWAYS_ON,
+	  PD_SCU },
+	{ "ca7-cpu0",	0x1c0, 0, R8A77470_PD_CA7_CPU0,	R8A77470_PD_CA7_SCU,
+	  PD_CPU_NOCR },
+	{ "ca7-cpu1",	0x1c0, 1, R8A77470_PD_CA7_CPU1,	R8A77470_PD_CA7_SCU,
+	  PD_CPU_NOCR },
+	{ "sgx",	 0xc0, 0, R8A77470_PD_SGX, R8A77470_PD_ALWAYS_ON },
+};
+
+const struct rcar_sysc_info r8a77470_sysc_info __initconst = {
+	.areas = r8a77470_areas,
+	.num_areas = ARRAY_SIZE(r8a77470_areas),
+};

drivers/soc/renesas/rcar-sysc.c

···
 #ifdef CONFIG_SYSC_R8A7745
 	{ .compatible = "renesas,r8a7745-sysc", .data = &r8a7745_sysc_info },
 #endif
+#ifdef CONFIG_SYSC_R8A77470
+	{ .compatible = "renesas,r8a77470-sysc", .data = &r8a77470_sysc_info },
+#endif
 #ifdef CONFIG_SYSC_R8A7779
 	{ .compatible = "renesas,r8a7779-sysc", .data = &r8a7779_sysc_info },
 #endif

drivers/soc/renesas/rcar-sysc.h

···
 
 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 r8a7779_sysc_info;
 extern const struct rcar_sysc_info r8a7790_sysc_info;
 extern const struct rcar_sysc_info r8a7791_sysc_info;

include/dt-bindings/power/r8a77470-sysc.h

···
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2018 Renesas Electronics Corp.
+ */
+#ifndef __DT_BINDINGS_POWER_R8A77470_SYSC_H__
+#define __DT_BINDINGS_POWER_R8A77470_SYSC_H__
+
+/*
+ * These power domain indices match the numbers of the interrupt bits
+ * representing the power areas in the various Interrupt Registers
+ * (e.g. SYSCISR, Interrupt Status Register)
+ */
+
+#define R8A77470_PD_CA7_CPU0		 5
+#define R8A77470_PD_CA7_CPU1		 6
+#define R8A77470_PD_SGX			20
+#define R8A77470_PD_CA7_SCU		21
+
+/* Always-on power area */
+#define R8A77470_PD_ALWAYS_ON		32
+
+#endif /* __DT_BINDINGS_POWER_R8A77470_SYSC_H__ */