Merge branch 'milbeaut/newsoc' into arm/newsoc

Sugaya Taichi <sugaya.taichi@socionext.com> explains:

Here is the series of patches the initial support for SC2000(M10V) of
Milbeaut SoCs. "M10V" is the internal name of SC2000, so commonly used in
source code.

SC2000 is a SoC of the Milbeaut series. equipped with a DSP optimized for
computer vision. It also features advanced functionalities such as 360-degree,
real-time spherical stitching with multi cameras, image stabilization for
without mechanical gimbals, and rolling shutter correction. More detail is
below:
https://www.socionext.com/en/products/assp/milbeaut/SC2000.html

Specifications for developers are below:
 - Quad-core 32bit Cortex-A7 on ARMv7-A architecture
 - NEON support
 - DSP
 - GPU
 - MAX 3GB DDR3
 - Cortex-M0 for power control
 - NAND Flash Interface
 - SD UHS-I
 - SD UHS-II
 - SDIO
 - USB2.0 HOST / Device
 - USB3.0 HOST / Device
 - PCI express Gen2
 - Ethernet Engine
 - I2C
 - UART
 - SPI
 - PWM

Support is quite minimal for now, since it only includes timer, clock,
pictrl and serial controller drivers, so we can only boot to userspace
through initramfs. Support for the other peripherals  will come eventually.

* milbeaut/newsoc:
  ARM: multi_v7_defconfig: add ARCH_MILBEAUT and ARCH_MILBEAUT_M10V
  ARM: configs: Add Milbeaut M10V defconfig
  ARM: dts: milbeaut: Add device tree set for the Milbeaut M10V board
  clocksource/drivers/timer-milbeaut: Introduce timer for Milbeaut SoCs
  dt-bindings: timer: Add Milbeaut M10V timer description
  ARM: milbeaut: Add basic support for Milbeaut m10v SoC
  dt-bindings: Add documentation for Milbeaut SoCs
  dt-bindings: arm: Add SMP enable-method for Milbeaut
  dt-bindings: sram: milbeaut: Add binding for Milbeaut smp-sram

Link: https://lore.kernel.org/linux-arm-kernel/1551243056-10521-1-git-send-email-sugaya.taichi@socionext.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

3 files changed, 128 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index bd40148a15b2..f697d87e99aa 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -1233,6 +1233,7 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += \
 	mt7623n-bananapi-bpi-r2.dtb \
 	mt8127-moose.dtb \
 	mt8135-evbp1.dtb
+dtb-$(CONFIG_ARCH_MILBEAUT) += milbeaut-m10v-evb.dtb
 dtb-$(CONFIG_ARCH_ZX) += zx296702-ad1.dtb
 dtb-$(CONFIG_ARCH_ASPEED) += \
 	aspeed-ast2500-evb.dtb \
diff --git a/arch/arm/boot/dts/milbeaut-m10v-evb.dts b/arch/arm/boot/dts/milbeaut-m10v-evb.dts
new file mode 100644
index 000000000000..614f60c6b0a2
--- /dev/null
+++ b/arch/arm/boot/dts/milbeaut-m10v-evb.dts
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Socionext Milbeaut M10V Evaluation Board */
+/dts-v1/;
+#include "milbeaut-m10v.dtsi"
+
+/ {
+	model = "Socionext M10V EVB";
+	compatible = "socionext,milbeaut-m10v-evb", "socionext,sc2000a";
+
+	aliases {
+		serial0 = &uart1;
+	};
+
+	chosen {
+		bootargs = "rootwait earlycon";
+		stdout-path = "serial0:115200n8";
+	};
+
+	clocks {
+		uclk40xi: uclk40xi {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <40000000>;
+		};
+	};
+
+	memory@40000000 {
+		device_type = "memory";
+		reg = <0x40000000  0x80000000>;
+	};
+
+};
diff --git a/arch/arm/boot/dts/milbeaut-m10v.dtsi b/arch/arm/boot/dts/milbeaut-m10v.dtsi
new file mode 100644
index 000000000000..aa7c6caeb750
--- /dev/null
+++ b/arch/arm/boot/dts/milbeaut-m10v.dtsi
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	compatible = "socionext,sc2000a";
+	interrupt-parent = <&gic>;
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		enable-method = "socionext,milbeaut-m10v-smp";
+		cpu@f00 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a7";
+			reg = <0xf00>;
+		};
+		cpu@f01 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a7";
+			reg = <0xf01>;
+		};
+		cpu@f02 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a7";
+			reg = <0xf02>;
+		};
+		cpu@f03 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a7";
+			reg = <0xf03>;
+		};
+	};
+
+	timer { /* The Generic Timer */
+		compatible = "arm,armv7-timer";
+		interrupts = <GIC_PPI 13
+				(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
+			<GIC_PPI 14
+				(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
+			<GIC_PPI 11
+				(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
+			<GIC_PPI 10
+				(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
+		clock-frequency = <40000000>;
+		always-on;
+	};
+
+	soc {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+		interrupt-parent = <&gic>;
+
+		gic: interrupt-controller@1d000000 {
+			compatible = "arm,cortex-a7-gic";
+			interrupt-controller;
+			#interrupt-cells = <3>;
+			reg = <0x1d001000 0x1000>,
+			      <0x1d002000 0x1000>; /* CPU I/f base and size */
+		};
+
+		timer@1e000050 { /* 32-bit Reload Timers */
+			compatible = "socionext,milbeaut-timer";
+			reg = <0x1e000050 0x20>;
+			interrupts = <0 91 4>;
+		};
+
+		uart1: serial@1e700010 { /* PE4, PE5 */
+			/* Enable this as ttyUSI0 */
+			compatible = "socionext,milbeaut-usio-uart";
+			reg = <0x1e700010 0x10>;
+			interrupts = <0 141 0x4>, <0 149 0x4>;
+			interrupt-names = "rx", "tx";
+		};
+
+	};
+
+	sram@0 {
+		compatible = "mmio-sram";
+		reg = <0x0 0x10000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0x0 0x10000>;
+		smp-sram@f100 {
+			compatible = "socionext,milbeaut-smp-sram";
+			reg = <0xf100 0x20>;
+		};
+	};
+};