ARM: dts: renesas: Add RZ/A1 platform code

Add platform code and DTs for Renesas RZ/A1 R7S72100 SoC.
Distinguishing feature of this SoC is that it has up to
10 MiB of on-SoC static RAM (SRAM).

The DTs are imported from Linux 5.0.11, commit d5a2675b207d .
Signed-off-by: NMarek Vasut <marek.vasut+renesas@gmail.com>
Cc: Chris Brandt <chris.brandt@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/arm/Kconfig

@@ -785,7 +785,7 @@ config ARCH_QEMU
 
 config ARCH_RMOBILE
 	bool "Renesas ARM SoCs"
-	select BOARD_EARLY_INIT_F
+	select BOARD_EARLY_INIT_F if !RZA1
 	select DM
 	select DM_SERIAL
 	imply CMD_DM

arch/arm/mach-rmobile/Kconfig

@@ -22,9 +22,14 @@ config RCAR_GEN3
 	imply CMD_MMC_SWRITE if MMC
 	imply SUPPORT_EMMC_RPMB if MMC
 
+config RZA1
+	prompt "Renesas ARM SoCs RZ/A1 (32bit)"
+	select CPU_V7A
+
 endchoice
 
 source "arch/arm/mach-rmobile/Kconfig.32"
 source "arch/arm/mach-rmobile/Kconfig.64"
+source "arch/arm/mach-rmobile/Kconfig.rza1"
 
 endif

arch/arm/mach-rmobile/Kconfig.rza1

+if RZA1
+
+# required by the Ethernet driver
+config R7S72100
+	bool
+	default y
+
+# required by serial and usb driver
+config CPU_RZA1
+	bool
+	default y
+
+choice
+	prompt "Renesas RZ/A1 board select"
+
+endchoice
+
+config SYS_SOC
+	default "rmobile"
+
+endif

arch/arm/mach-rmobile/cpu_info.c

@@ -26,6 +26,7 @@ void enable_caches(void)
 #endif
 
 #ifdef CONFIG_DISPLAY_CPUINFO
+#ifndef CONFIG_RZA1
 static u32 __rmobile_get_cpu_type(void)
 {
 	return 0x0;
@@ -105,4 +106,11 @@ int print_cpuinfo(void)
 
 	return 0;
 }
+#else
+int print_cpuinfo(void)
+{
+	printf("CPU: Renesas Electronics RZ/A1\n");
+	return 0;
+}
+#endif
 #endif /* CONFIG_DISPLAY_CPUINFO */

arch/arm/mach-rmobile/include/mach/rmobile.h

@@ -18,6 +18,7 @@
 #include <asm/arch/r8a7794.h>
 #elif defined(CONFIG_RCAR_GEN3)
 #include <asm/arch/rcar-gen3-base.h>
+#elif defined(CONFIG_R7S72100)
 #else
 #error "SOC Name not defined"
 #endif

include/dt-bindings/clock/r7s72100-clock.h

+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2014 Renesas Solutions Corp.
+ * Copyright (C) 2014 Wolfram Sang, Sang Engineering <wsa@sang-engineering.com>
+ */
+
+#ifndef __DT_BINDINGS_CLOCK_R7S72100_H__
+#define __DT_BINDINGS_CLOCK_R7S72100_H__
+
+#define R7S72100_CLK_PLL	0
+#define R7S72100_CLK_I		1
+#define R7S72100_CLK_G		2
+
+/* MSTP2 */
+#define R7S72100_CLK_CORESIGHT	0
+
+/* MSTP3 */
+#define R7S72100_CLK_IEBUS	7
+#define R7S72100_CLK_IRDA	6
+#define R7S72100_CLK_LIN0	5
+#define R7S72100_CLK_LIN1	4
+#define R7S72100_CLK_MTU2	3
+#define R7S72100_CLK_CAN	2
+#define R7S72100_CLK_ADCPWR	1
+#define R7S72100_CLK_PWM	0
+
+/* MSTP4 */
+#define R7S72100_CLK_SCIF0	7
+#define R7S72100_CLK_SCIF1	6
+#define R7S72100_CLK_SCIF2	5
+#define R7S72100_CLK_SCIF3	4
+#define R7S72100_CLK_SCIF4	3
+#define R7S72100_CLK_SCIF5	2
+#define R7S72100_CLK_SCIF6	1
+#define R7S72100_CLK_SCIF7	0
+
+/* MSTP5 */
+#define R7S72100_CLK_SCI0	7
+#define R7S72100_CLK_SCI1	6
+#define R7S72100_CLK_SG0	5
+#define R7S72100_CLK_SG1	4
+#define R7S72100_CLK_SG2	3
+#define R7S72100_CLK_SG3	2
+#define R7S72100_CLK_OSTM0	1
+#define R7S72100_CLK_OSTM1	0
+
+/* MSTP6 */
+#define R7S72100_CLK_ADC	7
+#define R7S72100_CLK_CEU	6
+#define R7S72100_CLK_DOC0	5
+#define R7S72100_CLK_DOC1	4
+#define R7S72100_CLK_DRC0	3
+#define R7S72100_CLK_DRC1	2
+#define R7S72100_CLK_JCU	1
+#define R7S72100_CLK_RTC	0
+
+/* MSTP7 */
+#define R7S72100_CLK_VDEC0	7
+#define R7S72100_CLK_VDEC1	6
+#define R7S72100_CLK_ETHER	4
+#define R7S72100_CLK_NAND	3
+#define R7S72100_CLK_USB0	1
+#define R7S72100_CLK_USB1	0
+
+/* MSTP8 */
+#define R7S72100_CLK_IMR0	7
+#define R7S72100_CLK_IMR1	6
+#define R7S72100_CLK_IMRDISP	5
+#define R7S72100_CLK_MMCIF	4
+#define R7S72100_CLK_MLB	3
+#define R7S72100_CLK_ETHAVB	2
+#define R7S72100_CLK_SCUX	1
+
+/* MSTP9 */
+#define R7S72100_CLK_I2C0	7
+#define R7S72100_CLK_I2C1	6
+#define R7S72100_CLK_I2C2	5
+#define R7S72100_CLK_I2C3	4
+#define R7S72100_CLK_SPIBSC0	3
+#define R7S72100_CLK_SPIBSC1	2
+#define R7S72100_CLK_VDC50	1	/* and LVDS */
+#define R7S72100_CLK_VDC51	0
+
+/* MSTP10 */
+#define R7S72100_CLK_SPI0	7
+#define R7S72100_CLK_SPI1	6
+#define R7S72100_CLK_SPI2	5
+#define R7S72100_CLK_SPI3	4
+#define R7S72100_CLK_SPI4	3
+#define R7S72100_CLK_CDROM	2
+#define R7S72100_CLK_SPDIF	1
+#define R7S72100_CLK_RGPVG2	0
+
+/* MSTP11 */
+#define R7S72100_CLK_SSI0	5
+#define R7S72100_CLK_SSI1	4
+#define R7S72100_CLK_SSI2	3
+#define R7S72100_CLK_SSI3	2
+#define R7S72100_CLK_SSI4	1
+#define R7S72100_CLK_SSI5	0
+
+/* MSTP12 */
+#define R7S72100_CLK_SDHI00	3
+#define R7S72100_CLK_SDHI01	2
+#define R7S72100_CLK_SDHI10	1
+#define R7S72100_CLK_SDHI11	0
+
+/* MSTP13 */
+#define R7S72100_CLK_PIX1	2
+#define R7S72100_CLK_PIX0	1
+
+#endif /* __DT_BINDINGS_CLOCK_R7S72100_H__ */

include/dt-bindings/pinctrl/r7s72100-pinctrl.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Defines macros and constants for Renesas RZ/A1 pin controller pin
+ * muxing functions.
+ */
+#ifndef __DT_BINDINGS_PINCTRL_RENESAS_RZA1_H
+#define __DT_BINDINGS_PINCTRL_RENESAS_RZA1_H
+
+#define RZA1_PINS_PER_PORT	16
+
+/*
+ * Create the pin index from its bank and position numbers and store in
+ * the upper 16 bits the alternate function identifier
+ */
+#define RZA1_PINMUX(b, p, f)	\
+	((b) * RZA1_PINS_PER_PORT + (p) | ((f) << 16))
+
+#endif /* __DT_BINDINGS_PINCTRL_RENESAS_RZA1_H */