[PATCH v2 3/5] arm: bcmbca: add bcm6878 SoC support

William Zhang william.zhang at broadcom.com
Mon Aug 1 20:39:23 CEST 2022


BCM6878 is an ARM A7 based PON Broadband SoC. It is part of the BCA
(Broadband Carrier Access origin) chipset family so it's added under
ARCH_BCMBCA platform. This initial support includes a bare-bone
implementation and dts with CPU subsystem, memory and ARM PL011
uart.

This SoC is supported in the linux-next git repository so the dts and
dtsi files are copied from linux with minor fix-up that needs to be
upstreamed to linux as well.

The u-boot image can be loaded from flash or network to the entry point
address in the memory and boot from there.

Signed-off-by: William Zhang <william.zhang at broadcom.com>

---

Changes in v2:
- Move COUNTER_FREQUENCY to bcm6878 defconfig

 MAINTAINERS                           |   1 +
 arch/arm/dts/Makefile                 |   2 +
 arch/arm/dts/bcm6878.dtsi             | 111 ++++++++++++++++++++++++++
 arch/arm/dts/bcm96878.dts             |  30 +++++++
 arch/arm/mach-bcmbca/Kconfig          |   8 ++
 arch/arm/mach-bcmbca/Makefile         |   1 +
 arch/arm/mach-bcmbca/bcm6878/Kconfig  |  17 ++++
 arch/arm/mach-bcmbca/bcm6878/Makefile |   5 ++
 board/broadcom/bcmbca/Kconfig         |   7 ++
 configs/bcm96878_defconfig            |  23 ++++++
 include/configs/bcm96878.h            |  11 +++
 11 files changed, 216 insertions(+)
 create mode 100644 arch/arm/dts/bcm6878.dtsi
 create mode 100644 arch/arm/dts/bcm96878.dts
 create mode 100644 arch/arm/mach-bcmbca/bcm6878/Kconfig
 create mode 100644 arch/arm/mach-bcmbca/bcm6878/Makefile
 create mode 100644 configs/bcm96878_defconfig
 create mode 100644 include/configs/bcm96878.h

diff --git a/MAINTAINERS b/MAINTAINERS
index b0fde1cb7285..db16d0211c52 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -220,6 +220,7 @@ N:	bcmbca
 N:	bcm[9]?47622
 N:	bcm[9]?63178
 N:	bcm[9]?6846
+N:	bcm[9]?6878
 
 ARM BROADCOM BCMSTB
 M:	Thomas Fitzsimmons <fitzsim at fitzsim.org>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 5300ae8b2a1c..281f92c841c0 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -1169,6 +1169,8 @@ dtb-$(CONFIG_BCM63178) += \
 	bcm963178.dtb
 dtb-$(CONFIG_BCM6846) += \
 	bcm96846.dtb
+dtb-$(CONFIG_BCM6878) += \
+	bcm96878.dtb
 
 dtb-$(CONFIG_ASPEED_AST2500) += ast2500-evb.dtb
 dtb-$(CONFIG_ASPEED_AST2600) += ast2600-evb.dtb
diff --git a/arch/arm/dts/bcm6878.dtsi b/arch/arm/dts/bcm6878.dtsi
new file mode 100644
index 000000000000..1e8b5fa96c25
--- /dev/null
+++ b/arch/arm/dts/bcm6878.dtsi
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2022 Broadcom Ltd.
+ */
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	compatible = "brcm,bcm6878", "brcm,bcmbca";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	interrupt-parent = <&gic>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		CA7_0: cpu at 0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a7";
+			reg = <0x0>;
+			next-level-cache = <&L2_0>;
+			enable-method = "psci";
+		};
+
+		CA7_1: cpu at 1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a7";
+			reg = <0x1>;
+			next-level-cache = <&L2_0>;
+			enable-method = "psci";
+		};
+
+		L2_0: l2-cache0 {
+			compatible = "cache";
+		};
+	};
+
+	timer {
+		compatible = "arm,armv7-timer";
+		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
+			<GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
+			<GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
+			<GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>;
+		arm,cpu-registers-not-fw-configured;
+	};
+
+	pmu: pmu {
+		compatible = "arm,cortex-a7-pmu";
+		interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>,
+			<GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-affinity = <&CA7_0>, <&CA7_1>;
+	};
+
+	clocks: clocks {
+		periph_clk: periph-clk {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <200000000>;
+		};
+		uart_clk: uart-clk {
+			compatible = "fixed-factor-clock";
+			#clock-cells = <0>;
+			clocks = <&periph_clk>;
+			clock-div = <4>;
+			clock-mult = <1>;
+		};
+	};
+
+	psci {
+		compatible = "arm,psci-0.2";
+		method = "smc";
+	};
+
+	axi at 81000000 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0x81000000 0x8000>;
+
+		gic: interrupt-controller at 1000 {
+			compatible = "arm,cortex-a7-gic";
+			#interrupt-cells = <3>;
+			interrupt-controller;
+			reg = <0x1000 0x1000>,
+				<0x2000 0x2000>,
+				<0x4000 0x2000>,
+				<0x6000 0x2000>;
+			interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(2) |
+					IRQ_TYPE_LEVEL_HIGH)>;
+		};
+	};
+
+	bus at ff800000 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0xff800000 0x800000>;
+
+		uart0: serial at 12000 {
+			compatible = "arm,pl011", "arm,primecell";
+			reg = <0x12000 0x1000>;
+			interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&uart_clk>, <&uart_clk>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+	};
+};
diff --git a/arch/arm/dts/bcm96878.dts b/arch/arm/dts/bcm96878.dts
new file mode 100644
index 000000000000..8fbc175cb452
--- /dev/null
+++ b/arch/arm/dts/bcm96878.dts
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2019 Broadcom Ltd.
+ */
+
+/dts-v1/;
+
+#include "bcm6878.dtsi"
+
+/ {
+	model = "Broadcom BCM96878 Reference Board";
+	compatible = "brcm,bcm96878", "brcm,bcm6878", "brcm,bcmbca";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory at 0 {
+		device_type = "memory";
+		reg = <0x0 0x08000000>;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
diff --git a/arch/arm/mach-bcmbca/Kconfig b/arch/arm/mach-bcmbca/Kconfig
index 891ac30dbdce..5b67975c4542 100644
--- a/arch/arm/mach-bcmbca/Kconfig
+++ b/arch/arm/mach-bcmbca/Kconfig
@@ -26,8 +26,16 @@ config BCM6846
 	select DM_SERIAL
 	select BCM6345_SERIAL
 
+config BCM6878
+	bool "Support for Broadcom 6878 Family"
+	select SYS_ARCH_TIMER
+	select CPU_V7A
+	select DM_SERIAL
+	select PL01X_SERIAL
+
 source "arch/arm/mach-bcmbca/bcm47622/Kconfig"
 source "arch/arm/mach-bcmbca/bcm63178/Kconfig"
 source "arch/arm/mach-bcmbca/bcm6846/Kconfig"
+source "arch/arm/mach-bcmbca/bcm6878/Kconfig"
 
 endif
diff --git a/arch/arm/mach-bcmbca/Makefile b/arch/arm/mach-bcmbca/Makefile
index 308730407212..87710c66f9b7 100644
--- a/arch/arm/mach-bcmbca/Makefile
+++ b/arch/arm/mach-bcmbca/Makefile
@@ -6,3 +6,4 @@
 obj-$(CONFIG_BCM47622) += bcm47622/
 obj-$(CONFIG_BCM63178) += bcm63178/
 obj-$(CONFIG_BCM6846) += bcm6846/
+obj-$(CONFIG_BCM6878) += bcm6878/
diff --git a/arch/arm/mach-bcmbca/bcm6878/Kconfig b/arch/arm/mach-bcmbca/bcm6878/Kconfig
new file mode 100644
index 000000000000..43f8942c9b1d
--- /dev/null
+++ b/arch/arm/mach-bcmbca/bcm6878/Kconfig
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2022 Broadcom Ltd
+#
+
+if BCM6878
+
+config TARGET_BCM96878
+	bool "Broadcom 6878 Reference Board"
+	depends on ARCH_BCMBCA
+
+config SYS_SOC
+	default "bcm6878"
+
+source "board/broadcom/bcmbca/Kconfig"
+
+endif
diff --git a/arch/arm/mach-bcmbca/bcm6878/Makefile b/arch/arm/mach-bcmbca/bcm6878/Makefile
new file mode 100644
index 000000000000..beb979af7520
--- /dev/null
+++ b/arch/arm/mach-bcmbca/bcm6878/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2022 Broadcom Ltd
+#
+obj- += dummy.o
diff --git a/board/broadcom/bcmbca/Kconfig b/board/broadcom/bcmbca/Kconfig
index 70ca38099fcf..2d95deec6666 100644
--- a/board/broadcom/bcmbca/Kconfig
+++ b/board/broadcom/bcmbca/Kconfig
@@ -16,6 +16,13 @@ config SYS_CONFIG_NAME
 
 endif
 
+if TARGET_BCM96878
+
+config SYS_CONFIG_NAME
+	default "bcm96878"
+
+endif
+
 if TARGET_BCM963178
 
 config SYS_CONFIG_NAME
diff --git a/configs/bcm96878_defconfig b/configs/bcm96878_defconfig
new file mode 100644
index 000000000000..847646239ee2
--- /dev/null
+++ b/configs/bcm96878_defconfig
@@ -0,0 +1,23 @@
+CONFIG_ARM=y
+CONFIG_COUNTER_FREQUENCY=50000000
+CONFIG_ARCH_BCMBCA=y
+CONFIG_SYS_TEXT_BASE=0x01000000
+CONFIG_SYS_MALLOC_LEN=0x2000000
+CONFIG_SYS_MALLOC_F_LEN=0x8000
+CONFIG_BCM6878=y
+CONFIG_TARGET_BCM96878=y
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_DEFAULT_DEVICE_TREE="bcm96878"
+CONFIG_IDENT_STRING=" Broadcom BCM6878"
+CONFIG_SYS_LOAD_ADDR=0x01000000
+CONFIG_ENV_VARS_UBOOT_CONFIG=y
+CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x2000000
+CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_MAXARGS=64
+CONFIG_SYS_BOOTM_LEN=0x4000000
+CONFIG_CMD_CACHE=y
+CONFIG_OF_EMBED=y
+CONFIG_CLK=y
diff --git a/include/configs/bcm96878.h b/include/configs/bcm96878.h
new file mode 100644
index 000000000000..3e23e94ac4bd
--- /dev/null
+++ b/include/configs/bcm96878.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2022 Broadcom Ltd.
+ */
+
+#ifndef __BCM96878_H
+#define __BCM96878_H
+
+#define CONFIG_SYS_SDRAM_BASE		0x00000000
+
+#endif
-- 
2.37.1

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