soc: renesas: rcar-sysc: Add R-Car M3-N support

Add support for R-Car M3-N (R8A77965) power areas.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

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

@@ -17,6 +17,7 @@ Required properties:
       - "renesas,r8a7794-sysc" (R-Car E2)
       - "renesas,r8a7795-sysc" (R-Car H3)
       - "renesas,r8a7796-sysc" (R-Car M3-W)
+      - "renesas,r8a77965-sysc" (R-Car M3-N)
       - "renesas,r8a77970-sysc" (R-Car V3M)
       - "renesas,r8a77980-sysc" (R-Car V3H)
       - "renesas,r8a77995-sysc" (R-Car D3)

drivers/soc/renesas/Kconfig

@@ -14,6 +14,7 @@ config SOC_RENESAS
 	select SYSC_R8A7794 if ARCH_R8A7794
 	select SYSC_R8A7795 if ARCH_R8A7795
 	select SYSC_R8A7796 if ARCH_R8A7796
+	select SYSC_R8A77965 if ARCH_R8A77965
 	select SYSC_R8A77970 if ARCH_R8A77970
 	select SYSC_R8A77980 if ARCH_R8A77980
 	select SYSC_R8A77995 if ARCH_R8A77995
@@ -57,6 +58,10 @@ config SYSC_R8A7796
 	bool "R-Car M3-W System Controller support" if COMPILE_TEST
 	select SYSC_RCAR
 
+config SYSC_R8A77965
+	bool "R-Car M3-N System Controller support" if COMPILE_TEST
+	select SYSC_RCAR
+
 config SYSC_R8A77970
 	bool "R-Car V3M System Controller support" if COMPILE_TEST
 	select SYSC_RCAR

drivers/soc/renesas/Makefile

@@ -12,6 +12,7 @@ obj-$(CONFIG_SYSC_R8A7792)	+= r8a7792-sysc.o
 obj-$(CONFIG_SYSC_R8A7794)	+= r8a7794-sysc.o
 obj-$(CONFIG_SYSC_R8A7795)	+= r8a7795-sysc.o
 obj-$(CONFIG_SYSC_R8A7796)	+= r8a7796-sysc.o
+obj-$(CONFIG_SYSC_R8A77965)	+= r8a77965-sysc.o
 obj-$(CONFIG_SYSC_R8A77970)	+= r8a77970-sysc.o
 obj-$(CONFIG_SYSC_R8A77980)	+= r8a77980-sysc.o
 obj-$(CONFIG_SYSC_R8A77995)	+= r8a77995-sysc.o

drivers/soc/renesas/r8a77965-sysc.c

@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas R-Car M3-N System Controller
+ * Copyright (C) 2018 Jacopo Mondi <jacopo+renesas@jmondi.org>
+ *
+ * Based on Renesas R-Car M3-W System Controller
+ * Copyright (C) 2016 Glider bvba
+ */
+
+#include <linux/bug.h>
+#include <linux/kernel.h>
+
+#include <dt-bindings/power/r8a77965-sysc.h>
+
+#include "rcar-sysc.h"
+
+static const struct rcar_sysc_area r8a77965_areas[] __initconst = {
+	{ "always-on",	    0, 0, R8A77965_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
+	{ "ca57-scu",	0x1c0, 0, R8A77965_PD_CA57_SCU,	R8A77965_PD_ALWAYS_ON,
+	  PD_SCU },
+	{ "ca57-cpu0",	 0x80, 0, R8A77965_PD_CA57_CPU0, R8A77965_PD_CA57_SCU,
+	  PD_CPU_NOCR },
+	{ "ca57-cpu1",	 0x80, 1, R8A77965_PD_CA57_CPU1, R8A77965_PD_CA57_SCU,
+	  PD_CPU_NOCR },
+	{ "cr7",	0x240, 0, R8A77965_PD_CR7,	R8A77965_PD_ALWAYS_ON },
+	{ "a3vc",	0x380, 0, R8A77965_PD_A3VC,	R8A77965_PD_ALWAYS_ON },
+	{ "a3vp",	0x340, 0, R8A77965_PD_A3VP,	R8A77965_PD_ALWAYS_ON },
+	{ "a2vc1",	0x3c0, 1, R8A77965_PD_A2VC1,	R8A77965_PD_A3VC },
+	{ "3dg-a",	0x100, 0, R8A77965_PD_3DG_A,	R8A77965_PD_ALWAYS_ON },
+	{ "3dg-b",	0x100, 1, R8A77965_PD_3DG_B,	R8A77965_PD_3DG_A },
+	{ "a3ir",	0x180, 0, R8A77965_PD_A3IR,	R8A77965_PD_ALWAYS_ON },
+};
+
+const struct rcar_sysc_info r8a77965_sysc_info __initconst = {
+	.areas = r8a77965_areas,
+	.num_areas = ARRAY_SIZE(r8a77965_areas),
+};

drivers/soc/renesas/rcar-sysc.c

@@ -284,6 +284,9 @@ static const struct of_device_id rcar_sysc_matches[] __initconst = {
 #ifdef CONFIG_SYSC_R8A7796
 	{ .compatible = "renesas,r8a7796-sysc", .data = &r8a7796_sysc_info },
 #endif
+#ifdef CONFIG_SYSC_R8A77965
+	{ .compatible = "renesas,r8a77965-sysc", .data = &r8a77965_sysc_info },
+#endif
 #ifdef CONFIG_SYSC_R8A77970
 	{ .compatible = "renesas,r8a77970-sysc", .data = &r8a77970_sysc_info },
 #endif

drivers/soc/renesas/rcar-sysc.h

@@ -58,6 +58,7 @@ extern const struct rcar_sysc_info r8a7792_sysc_info;
 extern const struct rcar_sysc_info r8a7794_sysc_info;
 extern const struct rcar_sysc_info r8a7795_sysc_info;
 extern const struct rcar_sysc_info r8a7796_sysc_info;
+extern const struct rcar_sysc_info r8a77965_sysc_info;
 extern const struct rcar_sysc_info r8a77970_sysc_info;
 extern const struct rcar_sysc_info r8a77980_sysc_info;
 extern const struct rcar_sysc_info r8a77995_sysc_info;

include/dt-bindings/power/r8a77965-sysc.h

@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 Jacopo Mondi <jacopo+renesas@jmondi.org>
+ * Copyright (C) 2016 Glider bvba
+ */
+
+#ifndef __DT_BINDINGS_POWER_R8A77965_SYSC_H__
+#define __DT_BINDINGS_POWER_R8A77965_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 R8A77965_PD_CA57_CPU0		 0
+#define R8A77965_PD_CA57_CPU1		 1
+#define R8A77965_PD_A3VP		 9
+#define R8A77965_PD_CA57_SCU		12
+#define R8A77965_PD_CR7			13
+#define R8A77965_PD_A3VC		14
+#define R8A77965_PD_3DG_A		17
+#define R8A77965_PD_3DG_B		18
+#define R8A77965_PD_A3IR		24
+#define R8A77965_PD_A2VC1		26
+
+/* Always-on power area */
+#define R8A77965_PD_ALWAYS_ON		32
+
+#endif /* __DT_BINDINGS_POWER_R8A77965_SYSC_H__ */