board: wexler: qc750: add WEXLER Tab 7t support

WEXLER Tab 7t is a mini tablet computer developed by WEXLER that
runs the Android operating system. The device features a 7.0-inch
(180 mm) HD display, an Nvidia Tegra 3 quad-core chip, 1 GB of RAM,
8, 16 or 32 GB of storage that can be supplemented with a microSDXC
card giving up to 64 GB of additional storage and a full size USB
port.

Tested-by: Maksim Kurnosenko <asusx2@mail.ru>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

5 files changed, 96 insertions, 0 deletions

diff --git a/board/wexler/qc750/Kconfig b/board/wexler/qc750/Kconfig
new file mode 100644
index 00000000000..45a1e5e057b
--- /dev/null
+++ b/board/wexler/qc750/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_QC750
+
+config SYS_BOARD
+	default "qc750"
+
+config SYS_VENDOR
+	default "wexler"
+
+config SYS_CONFIG_NAME
+	default "qc750"
+
+endif
diff --git a/board/wexler/qc750/MAINTAINERS b/board/wexler/qc750/MAINTAINERS
new file mode 100644
index 00000000000..017f6f2b707
--- /dev/null
+++ b/board/wexler/qc750/MAINTAINERS
@@ -0,0 +1,7 @@
+QC750 BOARD
+M:	Svyatoslav Ryhel <clamor95@gmail.com>
+S:	Maintained
+F:	board/wexler/qc750/
+F:	configs/qc750_defconfig
+F:	doc/board/wexler/qc750.rst
+F:	include/configs/qc750.h
diff --git a/board/wexler/qc750/Makefile b/board/wexler/qc750/Makefile
new file mode 100644
index 00000000000..4daefc4159a
--- /dev/null
+++ b/board/wexler/qc750/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+#  (C) Copyright 2010-2012
+#  NVIDIA Corporation <www.nvidia.com>
+#
+#  (C) Copyright 2023
+#  Svyatoslav Ryhel <clamor95@gmail.com>
+
+obj-$(CONFIG_SPL_BUILD) += qc750-spl.o
+
+obj-y += qc750.o
diff --git a/board/wexler/qc750/qc750-spl.c b/board/wexler/qc750/qc750-spl.c
new file mode 100644
index 00000000000..707be7779eb
--- /dev/null
+++ b/board/wexler/qc750/qc750-spl.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  T30 QC750 SPL stage configuration
+ *
+ *  (C) Copyright 2010-2013
+ *  NVIDIA Corporation <www.nvidia.com>
+ *
+ *  (C) Copyright 2023
+ *  Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <asm/arch/tegra.h>
+#include <asm/arch-tegra/tegra_i2c.h>
+#include <linux/delay.h>
+
+#define MAX77663_I2C_ADDR		(0x3c << 1)
+
+#define MAX77663_REG_SD0		0x16
+#define MAX77663_REG_SD0_DATA		(0x2100 | MAX77663_REG_SD0)
+#define MAX77663_REG_SD1		0x17
+#define MAX77663_REG_SD1_DATA		(0x3000 | MAX77663_REG_SD1)
+#define MAX77663_REG_LDO4		0x2b
+#define MAX77663_REG_LDO4_DATA		(0xE000 | MAX77663_REG_LDO4)
+
+#define MAX77663_REG_GPIO4		0x3a
+#define MAX77663_REG_GPIO4_DATA		(0x0100 | MAX77663_REG_GPIO4)
+
+void pmic_enable_cpu_vdd(void)
+{
+	/* Set VDD_CORE to 1.200V. */
+	tegra_i2c_ll_write(MAX77663_I2C_ADDR, MAX77663_REG_SD1_DATA);
+
+	udelay(1000);
+
+	/* Bring up VDD_CPU to 1.0125V. */
+	tegra_i2c_ll_write(MAX77663_I2C_ADDR, MAX77663_REG_SD0_DATA);
+	udelay(1000);
+
+	/* Bring up VDD_RTC to 1.200V. */
+	tegra_i2c_ll_write(MAX77663_I2C_ADDR, MAX77663_REG_LDO4_DATA);
+	udelay(10 * 1000);
+
+	/* Set 32k-out gpio state */
+	tegra_i2c_ll_write(MAX77663_I2C_ADDR, MAX77663_REG_GPIO4_DATA);
+}
diff --git a/board/wexler/qc750/qc750.c b/board/wexler/qc750/qc750.c
new file mode 100644
index 00000000000..5234211aea3
--- /dev/null
+++ b/board/wexler/qc750/qc750.c
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  (C) Copyright 2010-2013
+ *  NVIDIA Corporation <www.nvidia.com>
+ *
+ *  (C) Copyright 2023
+ *  Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <fdt_support.h>
+
+#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+	/* Remove TrustZone nodes */
+	fdt_del_node_and_alias(blob, "/firmware");
+	fdt_del_node_and_alias(blob, "/reserved-memory/trustzone@bfe00000");
+
+	return 0;
+}
+#endif