board: Add uCRobotics Bubblegum-96 board support

This commit adds uCRobotics Bubblegum-96 board support. This board is
one of the 96Boards Consumer Edition platform based on Actions Semi
S900 SoC.

Features:
- Actions Semi S900 SoC (4xCortex A53, Power VR G6230 GPU)
- 2GiB RAM
- 8GiB eMMC, uSD slot
- WiFi, Bluetooth and GPS module
- 2x Host, 1x Device USB port
- HDMI
- 20-pin low speed and 40-pin high speed expanders, 6 LED, 3 buttons

U-Boot will be loaded by ATF at EL2 execution level. Relevant driver
support will be added in further commits.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

4 files changed, 80 insertions, 0 deletions

diff --git a/board/ucRobotics/bubblegum_96/Kconfig b/board/ucRobotics/bubblegum_96/Kconfig
new file mode 100644
index 0000000000..2dd40d9b6a
--- /dev/null
+++ b/board/ucRobotics/bubblegum_96/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_BUBBLEGUM_96
+
+config SYS_BOARD
+	default "bubblegum_96"
+
+config SYS_VENDOR
+	default "ucRobotics"
+
+config SYS_SOC
+	default "s900"
+
+config SYS_CONFIG_NAME
+	default "bubblegum_96"
+
+endif
diff --git a/board/ucRobotics/bubblegum_96/MAINTAINERS b/board/ucRobotics/bubblegum_96/MAINTAINERS
new file mode 100644
index 0000000000..d0cb7278c6
--- /dev/null
+++ b/board/ucRobotics/bubblegum_96/MAINTAINERS
@@ -0,0 +1,6 @@
+BUBBLEGUM_96 BOARD
+M:	Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+S:	Maintained
+F:	board/ucRobotics/bubblegum_96/
+F:	include/configs/bubblegum_96.h
+F:	configs/bubblegum_96_defconfig
diff --git a/board/ucRobotics/bubblegum_96/Makefile b/board/ucRobotics/bubblegum_96/Makefile
new file mode 100644
index 0000000000..c4b524def2
--- /dev/null
+++ b/board/ucRobotics/bubblegum_96/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier:	GPL-2.0+
+
+obj-y   := bubblegum_96.o
diff --git a/board/ucRobotics/bubblegum_96/bubblegum_96.c b/board/ucRobotics/bubblegum_96/bubblegum_96.c
new file mode 100644
index 0000000000..a4c202da19
--- /dev/null
+++ b/board/ucRobotics/bubblegum_96/bubblegum_96.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Bubblegum-96 Boards Support
+ *
+ * Copyright (C) 2018 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+ */
+
+#include <linux/arm-smccc.h>
+#include <linux/psci.h>
+#include <common.h>
+#include <asm/io.h>
+#include <asm/mach-types.h>
+#include <asm/psci.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * dram_init - sets uboots idea of sdram size
+ */
+int dram_init(void)
+{
+	gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
+	return 0;
+}
+
+/* This is called after dram_init() so use get_ram_size result */
+int dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+	gd->bd->bi_dram[0].size = gd->ram_size;
+
+	return 0;
+}
+
+static void show_psci_version(void)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_smc(ARM_PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0, 0, 0, 0, 0, &res);
+
+	printf("PSCI:  v%ld.%ld\n",
+	       PSCI_VERSION_MAJOR(res.a0),
+		PSCI_VERSION_MINOR(res.a0));
+}
+
+int board_init(void)
+{
+	show_psci_version();
+
+	return 0;
+}
+
+void reset_cpu(ulong addr)
+{
+	psci_system_reset();
+}