[U-Boot] [PATCH 03/05] db820c: add qualcomm dragonboard 820C support
Jorge Ramirez-Ortiz
jorge.ramirez.ortiz at gmail.com
Tue Jan 9 09:12:01 UTC 2018
From: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz at linaro.org>
This commit adds support for 96Boards Dragonboard820C.
The board is based on APQ8086 Qualcomm Soc, complying with the
96Boards specification.
Features
- 4x Kyro CPU (64 bit) up to 2.15GHz
- USB2.0
- USB3.0
- ISP
- Qualcomm Hexagon DSP
- SD 3.0 (UHS-I)
- UFS 2.0
- Qualcomm Adreno 530 GPU
- GPS
- BT 4.2
- Wi-Fi 2.4GHz, 5GHz (802.11ac)
- PCIe 2.0
- MIPI-CSI, MIPI-DSI
- I2S
U-Boot boots chained from LK (LK implements the fastboot protocol) in
64-bit mode.
For detailed build instructions see readme.txt in the board directory.
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz at linaro.org>
---
arch/arm/dts/Makefile | 3 +-
arch/arm/dts/dragonboard820c.dts | 65 +++
arch/arm/mach-snapdragon/Kconfig | 10 +
arch/arm/mach-snapdragon/Makefile | 2 +
arch/arm/mach-snapdragon/clock-apq8096.c | 62 +++
.../mach-snapdragon/include/mach/sysmap-apq8096.h | 29 ++
arch/arm/mach-snapdragon/sysmap-apq8096.c | 32 ++
board/qualcomm/dragonboard820c/Kconfig | 15 +
board/qualcomm/dragonboard820c/MAINTAINERS | 6 +
board/qualcomm/dragonboard820c/Makefile | 8 +
board/qualcomm/dragonboard820c/dragonboard820c.c | 128 ++++++
board/qualcomm/dragonboard820c/head.S | 34 ++
board/qualcomm/dragonboard820c/readme.txt | 463 +++++++++++++++++++++
board/qualcomm/dragonboard820c/u-boot.lds | 106 +++++
configs/dragonboard820c_defconfig | 37 ++
include/configs/dragonboard820c.h | 72 ++++
16 files changed, 1071 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/dts/dragonboard820c.dts
create mode 100644 arch/arm/mach-snapdragon/clock-apq8096.c
create mode 100644 arch/arm/mach-snapdragon/include/mach/sysmap-apq8096.h
create mode 100644 arch/arm/mach-snapdragon/sysmap-apq8096.c
create mode 100644 board/qualcomm/dragonboard820c/Kconfig
create mode 100644 board/qualcomm/dragonboard820c/MAINTAINERS
create mode 100644 board/qualcomm/dragonboard820c/Makefile
create mode 100644 board/qualcomm/dragonboard820c/dragonboard820c.c
create mode 100644 board/qualcomm/dragonboard820c/head.S
create mode 100644 board/qualcomm/dragonboard820c/readme.txt
create mode 100644 board/qualcomm/dragonboard820c/u-boot.lds
create mode 100644 configs/dragonboard820c_defconfig
create mode 100644 include/configs/dragonboard820c.h
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index a895c70..6d0587e 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -211,7 +211,8 @@ dtb-$(CONFIG_FSL_LSCH2) += fsl-ls1043a-qds-duart.dtb \
fsl-ls1012a-rdb.dtb \
fsl-ls1012a-frdm.dtb
-dtb-$(CONFIG_ARCH_SNAPDRAGON) += dragonboard410c.dtb
+dtb-$(CONFIG_TARGET_DRAGONBOARD410C) += dragonboard410c.dtb
+dtb-$(CONFIG_TARGET_DRAGONBOARD820C) += dragonboard820c.dtb
dtb-$(CONFIG_STM32F7) += stm32f746-disco.dtb \
stm32f769-disco.dtb
diff --git a/arch/arm/dts/dragonboard820c.dts b/arch/arm/dts/dragonboard820c.dts
new file mode 100644
index 0000000..bad5a1e
--- /dev/null
+++ b/arch/arm/dts/dragonboard820c.dts
@@ -0,0 +1,65 @@
+/*
+ * Qualcomm APQ8096 based Dragonboard 820C board device tree source
+ *
+ * (C) Copyright 2017 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz at linaro.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/dts-v1/;
+
+#include "skeleton64.dtsi"
+
+/ {
+ model = "Qualcomm Technologies, Inc. DB820c";
+ compatible = "arrow,apq8096-db820c", "qcom,apq8096-sbc";
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ aliases {
+ serial0 = &blsp2_uart1;
+ };
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ memory {
+ device_type = "memory";
+ reg = <0 0x80000000 0 0xc0000000>;
+ };
+
+ psci {
+ compatible = "arm,psci-1.0";
+ method = "smc";
+ };
+
+ soc: soc {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 0 0 0xffffffff>;
+ compatible = "simple-bus";
+
+ gcc: clock-controller at 300000 {
+ compatible = "qcom,gcc-msm8996";
+ #clock-cells = <1>;
+ #reset-cells = <1>;
+ #power-domain-cells = <1>;
+ reg = <0x300000 0x90000>;
+ };
+
+ blsp2_uart1: serial at 75b0000 {
+ compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
+ reg = <0x75b0000 0x1000>;
+ };
+
+ sdhc2: sdhci at 74a4900 {
+ compatible = "qcom,sdhci-msm-v4";
+ reg = <0x74a4900 0x314>, <0x74a4000 0x800>;
+ index = <0x0>;
+ bus-width = <4>;
+ clock = <&gcc 0>;
+ clock-frequency = <200000000>;
+ };
+ };
+};
diff --git a/arch/arm/mach-snapdragon/Kconfig b/arch/arm/mach-snapdragon/Kconfig
index dc7ba21..d55dc1a 100644
--- a/arch/arm/mach-snapdragon/Kconfig
+++ b/arch/arm/mach-snapdragon/Kconfig
@@ -19,8 +19,18 @@ config TARGET_DRAGONBOARD410C
- HDMI
- 20-pin low speed and 40-pin high speed expanders, 4 LED, 3 buttons
+config TARGET_DRAGONBOARD820C
+ bool "96Boards Dragonboard 820C"
+ help
+ Support for 96Boards Dragonboard 820C. This board complies with
+ 96Board Open Platform Specifications. Features:
+ - Qualcomm Snapdragon 820C SoC - APQ8096 (4xKyro CPU)
+ - 3GiB RAM
+ - 32GiB UFS drive
+
endchoice
source "board/qualcomm/dragonboard410c/Kconfig"
+source "board/qualcomm/dragonboard820c/Kconfig"
endif
diff --git a/arch/arm/mach-snapdragon/Makefile b/arch/arm/mach-snapdragon/Makefile
index 74f90dc..7f35c79 100644
--- a/arch/arm/mach-snapdragon/Makefile
+++ b/arch/arm/mach-snapdragon/Makefile
@@ -4,6 +4,8 @@
# SPDX-License-Identifier: GPL-2.0+
#
+obj-$(CONFIG_TARGET_DRAGONBOARD820C) += clock-apq8096.o
+obj-$(CONFIG_TARGET_DRAGONBOARD820C) += sysmap-apq8096.o
obj-$(CONFIG_TARGET_DRAGONBOARD410C) += clock-apq8016.o
obj-$(CONFIG_TARGET_DRAGONBOARD410C) += sysmap-apq8016.o
obj-y += clock-snapdragon.o
diff --git a/arch/arm/mach-snapdragon/clock-apq8096.c b/arch/arm/mach-snapdragon/clock-apq8096.c
new file mode 100644
index 0000000..3224812
--- /dev/null
+++ b/arch/arm/mach-snapdragon/clock-apq8096.c
@@ -0,0 +1,62 @@
+/*
+ * Clock drivers for Qualcomm APQ8096
+ *
+ * (C) Copyright 2017 Jorge Ramirez Ortiz <jorge.ramirez-ortiz at linaro.org>
+ *
+ * Based on Little Kernel driver, simplified
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/io.h>
+#include <linux/bitops.h>
+#include "clock-snapdragon.h"
+
+/* GPLL0 clock control registers */
+#define GPLL0_STATUS_ACTIVE BIT(30)
+#define APCS_GPLL_ENA_VOTE_GPLL0 BIT(0)
+
+static const struct bcr_regs sdc_regs = {
+ .cfg_rcgr = SDCC2_CFG_RCGR,
+ .cmd_rcgr = SDCC2_CMD_RCGR,
+ .M = SDCC2_M,
+ .N = SDCC2_N,
+ .D = SDCC2_D,
+};
+
+static const struct gpll0_ctrl gpll0_ctrl = {
+ .status = GPLL0_STATUS,
+ .status_bit = GPLL0_STATUS_ACTIVE,
+ .ena_vote = APCS_GPLL_ENA_VOTE,
+ .vote_bit = APCS_GPLL_ENA_VOTE_GPLL0,
+};
+
+static int clk_init_sdc(struct msm_clk_priv *priv, uint rate)
+{
+ int div = 3;
+
+ clk_enable_cbc(priv->base + SDCC2_AHB_CBCR);
+ clk_rcg_set_rate_mnd(priv->base, &sdc_regs, div, 0, 0,
+ CFG_CLK_SRC_GPLL0);
+ clk_enable_gpll0(priv->base, &gpll0_ctrl);
+ clk_enable_cbc(priv->base + SDCC2_APPS_CBCR);
+
+ return rate;
+}
+
+ulong msm_set_rate(struct clk *clk, ulong rate)
+{
+ struct msm_clk_priv *priv = dev_get_priv(clk->dev);
+
+ switch (clk->id) {
+ case 0: /* SDC1 */
+ return clk_init_sdc(priv, rate);
+ break;
+ default:
+ return 0;
+ }
+}
diff --git a/arch/arm/mach-snapdragon/include/mach/sysmap-apq8096.h b/arch/arm/mach-snapdragon/include/mach/sysmap-apq8096.h
new file mode 100644
index 0000000..fb89de2
--- /dev/null
+++ b/arch/arm/mach-snapdragon/include/mach/sysmap-apq8096.h
@@ -0,0 +1,29 @@
+/*
+ * Qualcomm APQ8096 sysmap
+ *
+ * (C) Copyright 2017 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz at linaro.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#ifndef _MACH_SYSMAP_APQ8096_H
+#define _MACH_SYSMAP_APQ8096_H
+
+#define TLMM_BASE_ADDR (0x1010000)
+
+/* Strength (sdc1) */
+#define SDC1_HDRV_PULL_CTL_REG (TLMM_BASE_ADDR + 0x0012D000)
+
+/* Clocks: (from CLK_CTL_BASE) */
+#define GPLL0_STATUS (0x0000)
+#define APCS_GPLL_ENA_VOTE (0x52000)
+
+#define SDCC2_BCR (0x14000) /* block reset */
+#define SDCC2_APPS_CBCR (0x14004) /* branch control */
+#define SDCC2_AHB_CBCR (0x14008)
+#define SDCC2_CMD_RCGR (0x14010)
+#define SDCC2_CFG_RCGR (0x14014)
+#define SDCC2_M (0x14018)
+#define SDCC2_N (0x1401C)
+#define SDCC2_D (0x14020)
+
+#endif
diff --git a/arch/arm/mach-snapdragon/sysmap-apq8096.c b/arch/arm/mach-snapdragon/sysmap-apq8096.c
new file mode 100644
index 0000000..cb6d1e4
--- /dev/null
+++ b/arch/arm/mach-snapdragon/sysmap-apq8096.c
@@ -0,0 +1,32 @@
+/*
+ * Qualcomm APQ8096 memory map
+ *
+ * (C) Copyright 2017 Jorge Ramirez Ortiz <jorge.ramirez-ortiz at linaro.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/armv8/mmu.h>
+
+static struct mm_region apq8096_mem_map[] = {
+ {
+ .virt = 0x0UL, /* Peripheral block */
+ .phys = 0x0UL, /* Peripheral block */
+ .size = 0x10000000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+ PTE_BLOCK_NON_SHARE |
+ PTE_BLOCK_PXN | PTE_BLOCK_UXN
+ }, {
+ .virt = 0x80000000UL, /* DDR */
+ .phys = 0x80000000UL, /* DDR */
+ .size = 0xC0000000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+ PTE_BLOCK_INNER_SHARE
+ }, {
+ /* List terminator */
+ 0,
+ }
+};
+
+struct mm_region *mem_map = apq8096_mem_map;
diff --git a/board/qualcomm/dragonboard820c/Kconfig b/board/qualcomm/dragonboard820c/Kconfig
new file mode 100644
index 0000000..aff9af5
--- /dev/null
+++ b/board/qualcomm/dragonboard820c/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_DRAGONBOARD820C
+
+config SYS_BOARD
+ default "dragonboard820c"
+
+config SYS_VENDOR
+ default "qualcomm"
+
+config SYS_SOC
+ default "apq8096"
+
+config SYS_CONFIG_NAME
+ default "dragonboard820c"
+
+endif
diff --git a/board/qualcomm/dragonboard820c/MAINTAINERS b/board/qualcomm/dragonboard820c/MAINTAINERS
new file mode 100644
index 0000000..a157033
--- /dev/null
+++ b/board/qualcomm/dragonboard820c/MAINTAINERS
@@ -0,0 +1,6 @@
+DRAGONBOARD820C BOARD
+M: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz at linaro.org>
+S: Maintained
+F: board/qualcomm/dragonboard820c/
+F: include/configs/dragonboard820c.h
+F: configs/dragonboard820c_defconfig
diff --git a/board/qualcomm/dragonboard820c/Makefile b/board/qualcomm/dragonboard820c/Makefile
new file mode 100644
index 0000000..a1ce4b2
--- /dev/null
+++ b/board/qualcomm/dragonboard820c/Makefile
@@ -0,0 +1,8 @@
+#
+# (C) Copyright 2017 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz at gmail.com>
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-y := dragonboard820c.o
+extra-y += head.o
diff --git a/board/qualcomm/dragonboard820c/dragonboard820c.c b/board/qualcomm/dragonboard820c/dragonboard820c.c
new file mode 100644
index 0000000..8f40ba4
--- /dev/null
+++ b/board/qualcomm/dragonboard820c/dragonboard820c.c
@@ -0,0 +1,128 @@
+/*
+ * Board init file for Dragonboard 820C
+ *
+ * (C) Copyright 2017 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz at gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <asm/arch/sysmap-apq8096.h>
+#include <linux/arm-smccc.h>
+#include <linux/psci.h>
+#include <common.h>
+#include <dm.h>
+#include <asm/io.h>
+#include <linux/bitops.h>
+#include <asm/psci.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+ gd->ram_size = PHYS_SDRAM_SIZE;
+
+ return 0;
+}
+
+int dram_init_banksize(void)
+{
+ gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+ gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
+
+ gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
+ gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
+
+ return 0;
+}
+
+static void sdhci_power_init(void)
+{
+ const uint32_t TLMM_PULL_MASK = 0x3;
+ const uint32_t TLMM_HDRV_MASK = 0x7;
+
+ struct tlmm_cfg {
+ uint32_t bit; /* bit in the register */
+ uint8_t mask; /* mask clk/dat/cmd control */
+ uint8_t val;
+ };
+
+ /* bit offsets in the sdc tlmm register */
+ enum { SDC1_DATA_HDRV = 0,
+ SDC1_CMD_HDRV = 3,
+ SDC1_CLK_HDRV = 6,
+ SDC1_DATA_PULL = 9,
+ SDC1_CMD_PULL = 11,
+ SDC1_CLK_PULL = 13,
+ SDC1_RCLK_PULL = 15,
+ };
+
+ enum { TLMM_PULL_DOWN = 0x1,
+ TLMM_PULL_UP = 0x3,
+ TLMM_NO_PULL = 0x0,
+ };
+
+ enum { TLMM_CUR_VAL_10MA = 0x04,
+ TLMM_CUR_VAL_16MA = 0x07,
+ };
+ int i;
+
+ /* drive strength configs for sdhc pins */
+ const struct tlmm_cfg hdrv[] =
+ {
+ { SDC1_CLK_HDRV, TLMM_CUR_VAL_16MA, TLMM_HDRV_MASK, },
+ { SDC1_CMD_HDRV, TLMM_CUR_VAL_10MA, TLMM_HDRV_MASK, },
+ { SDC1_DATA_HDRV, TLMM_CUR_VAL_10MA, TLMM_HDRV_MASK, },
+ };
+
+ /* pull configs for sdhc pins */
+ const struct tlmm_cfg pull[] =
+ {
+ { SDC1_CLK_PULL, TLMM_NO_PULL, TLMM_PULL_MASK, },
+ { SDC1_CMD_PULL, TLMM_PULL_UP, TLMM_PULL_MASK, },
+ { SDC1_DATA_PULL, TLMM_PULL_UP, TLMM_PULL_MASK, },
+ };
+
+ const struct tlmm_cfg rclk[] =
+ {
+ { SDC1_RCLK_PULL, TLMM_PULL_DOWN, TLMM_PULL_MASK,},
+ };
+
+ for (i = 0; i < ARRAY_SIZE(hdrv); i++)
+ clrsetbits_le32(SDC1_HDRV_PULL_CTL_REG,
+ hdrv[i].mask << hdrv[i].bit,
+ hdrv[i].val << hdrv[i].bit);
+
+ for (i = 0; i < ARRAY_SIZE(pull); i++)
+ clrsetbits_le32(SDC1_HDRV_PULL_CTL_REG,
+ pull[i].mask << pull[i].bit,
+ pull[i].val << pull[i].bit);
+
+ for (i = 0; i < ARRAY_SIZE(rclk); i++)
+ clrsetbits_le32(SDC1_HDRV_PULL_CTL_REG,
+ rclk[i].mask << rclk[i].bit,
+ rclk[i].val << rclk[i].bit);
+}
+
+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)
+{
+ sdhci_power_init();
+ show_psci_version();
+
+ return 0;
+}
+
+void reset_cpu(ulong addr)
+{
+ psci_system_reset();
+}
diff --git a/board/qualcomm/dragonboard820c/head.S b/board/qualcomm/dragonboard820c/head.S
new file mode 100644
index 0000000..06d82d5
--- /dev/null
+++ b/board/qualcomm/dragonboard820c/head.S
@@ -0,0 +1,34 @@
+/*
+ * ARM64 header for proper chain-loading with Little Kernel.
+ *
+ * Little Kernel shipped with Dragonboard820C boots standard Linux images for
+ * ARM64. This file adds header that is required to boot U-Boot properly.
+ *
+ * For details see:
+ * https://www.kernel.org/doc/Documentation/arm64/booting.txt
+ *
+ * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski at gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+
+/*
+ * per document in linux/Doc/arm64/booting.text
+ */
+.global _arm64_header
+_arm64_header:
+ b _start
+ .word 0
+ .quad CONFIG_SYS_TEXT_BASE-PHYS_SDRAM_1 /* Image load offset, LE */
+ .quad 0 /* Effective size of kernel image, little-endian */
+ .quad 0 /* kernel flags, little-endian */
+ .quad 0 /* reserved */
+ .quad 0 /* reserved */
+ .quad 0 /* reserved */
+ .byte 0x41 /* Magic number, "ARM\x64" */
+ .byte 0x52
+ .byte 0x4d
+ .byte 0x64
+ .word 0 /* reserved (used for PE COFF offset) */
diff --git a/board/qualcomm/dragonboard820c/readme.txt b/board/qualcomm/dragonboard820c/readme.txt
new file mode 100644
index 0000000..88adb85
--- /dev/null
+++ b/board/qualcomm/dragonboard820c/readme.txt
@@ -0,0 +1,459 @@
+#
+# (C) Copyright 2017 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz at linaro.org>
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+================================================================================
+ What is working (enough to boot a distro from SD card)
+================================================================================
+ - UART
+ - SD card
+ - PSCI reset
+ - Environment in EXT4 partition 1 in SD card (check defconfig for details)
+ dont forget to insert the card in the SD slot before booting if you
+ are going to make mods to the environment
+
+================================================================================
+ Build & Run instructions
+================================================================================
+
+1) Install mkbootimg and dtbTool from Codeaurora:
+
+ git://codeaurora.org/quic/kernel/skales
+ commit 8492547e404e969262d9070dee9bdd15668bb70f worked for me.
+
+2) Setup CROSS_COMPILE to aarch64 compiler or if you use ccache just do
+ CROSS_COMPILE="ccache aarch64-linux-gnu-"
+
+3) cd to the u-boot tree
+
+ $ make dragonboard820c_config
+ $ make -j `nproc`
+
+4) generate fake, empty ramdisk (can have 0 bytes)
+
+ $ touch rd
+
+5) Generate qualcomm device tree table with dtbTool
+
+ $ dtbTool -o dt.img arch/arm/dts
+
+6) Generate Android boot image with mkbootimg:
+
+ $ mkbootimg --kernel=u-boot-dtb.bin \
+ --output=u-boot.img \
+ --dt=dt.img \
+ --pagesize 4096 \
+ --base 0x80000000 \
+ --ramdisk=rd \
+ --cmdline=""
+
+7) Reboot the board into fastboot mode
+ - plug the board micro-usb to your laptop usb host.
+ - reboot the board with vol- button pressed
+
+8) Boot the uboot image using fastboot
+
+ $ fastboot boot u-boot.img
+
+ or flash it to the UFS drive boot partition:
+
+ $ fastboot flash boot u-boot.img
+ $ fastboot reboot
+
+
+================================================================================
+ To boot a linux kernel from SDHCI with the ROOTFS on an NFS share:
+================================================================================
+
+1) create an EXT4 partition on the SD card (must be partition #1)
+
+2) build the kernel image and dtb (documented extensively somewhere else)
+
+3) copy the drivers to the NFS partition (ie: 192.168.1.2 /exports/db820c-rootfs)
+
+4) add the u-boot headers to the image:
+
+ $ mkimage -A arm64 \
+ -O linux \
+ -C none \
+ -T kernel \
+ -a 0x80080000 \
+ -e 0x80080000 \
+ -n Dragonboard820c \
+ -d $kernel/arch/arm64/boot/Image \
+ uImage
+
+5) copy the generated uImage and the device tree binary to the SD card EXT4
+ partition
+
+ $ cp uImage /mnt/boot/
+ $ cp apq8096-db820c.dtb /mnt/boot/
+
+6) on the SD card create /extlinux/extlinux.conf as follows:
+
+ default nfs
+ prompt 1
+ timeout 10
+
+ LABEL nfs
+ MENU NFS entry
+ LINUX /uImage
+ FDT /apq8096-db820c.dtb
+ APPEND root=/dev/nfs rw \
+ nfsroot=192.168.1.2:/exports/db829c-rootfs,v3,tcp \
+ rootwait \
+ ip=dhcp consoleblank=0 \
+ console=tty0 \
+ console=ttyMSM0,115200n8 \
+ earlyprintk earlycon=msm_serial_dm,0x75b0000 \
+ androidboot.bootdevice=624000.ufshc \
+ androidboot.verifiedbootstate=orange \
+ androidboot.ver0
+
+7) remove the SD card from the laptop and insert it back to the db820 board.
+ the SD card EXT4 partition#1 should contain:
+ /uImage
+ /apq8096-db820c.dtb
+ /extlinux/extlinux.conf
+
+8) reboot the db820 board
+
+================================================================================
+ Successful boot sequence
+================================================================================
+
+Format: Log Type - Time(microsec) - Message - Optional Info
+Log Type: B - Since Boot(Power On Reset), D - Delta, S - Statistic
+S - QC_IMAGE_VERSION_STRING=BOOT.XF.1.0-00301
+S - IMAGE_VARIANT_STRING=M8996LAB
+S - OEM_IMAGE_VERSION_STRING=crm-ubuntu68
+S - Boot Interface: UFS
+S - Secure Boot: Off
+S - Boot Config @ 0x00076044 = 0x000001c9
+S - JTAG ID @ 0x000760f4 = 0x4003e0e1
+S - OEM ID @ 0x000760f8 = 0x00000000
+S - Serial Number @ 0x00074138 = 0x2e8844ce
+S - OEM Config Row 0 @ 0x00074188 = 0x0000000000000000
+S - OEM Config Row 1 @ 0x00074190 = 0x0000000000000000
+S - Feature Config Row 0 @ 0x000741a0 = 0x0050000010000100
+S - Feature Config Row 1 @ 0x000741a8 = 0x00fff00001ffffff
+S - Core 0 Frequency, 1228 MHz
+B - 0 - PBL, Start
+B - 10412 - bootable_media_detect_entry, Start
+B - 47480 - bootable_media_detect_success, Start
+B - 47481 - elf_loader_entry, Start
+B - 49027 - auth_hash_seg_entry, Start
+B - 49129 - auth_hash_seg_exit, Start
+B - 82403 - elf_segs_hash_verify_entry, Start
+B - 84905 - PBL, End
+B - 86955 - SBL1, Start
+B - 182969 - usb: hs_phy_nondrive_start
+B - 183305 - usb: PLL lock success - 0x3
+B - 186294 - usb: hs_phy_nondrive_finish
+B - 190442 - boot_flash_init, Start
+D - 30 - boot_flash_init, Delta
+B - 197548 - sbl1_ddr_set_default_params, Start
+D - 30 - sbl1_ddr_set_default_params, Delta
+B - 205509 - boot_config_data_table_init, Start
+D - 200659 - boot_config_data_table_init, Delta - (60 Bytes)
+B - 410713 - CDT Version:3,Platform ID:24,Major ID:1,Minor ID:0,Subtype:0
+B - 415410 - Image Load, Start
+D - 22570 - PMIC Image Loaded, Delta - (37272 Bytes)
+B - 437980 - pm_device_init, Start
+B - 443744 - PON REASON:PM0:0x200000061 PM1:0x200000021
+B - 480161 - PM_SET_VAL:Skip
+D - 40016 - pm_device_init, Delta
+B - 482083 - pm_driver_init, Start
+D - 2928 - pm_driver_init, Delta
+B - 488671 - pm_sbl_chg_init, Start
+D - 91 - pm_sbl_chg_init, Delta
+B - 495442 - vsense_init, Start
+D - 0 - vsense_init, Delta
+B - 505171 - Pre_DDR_clock_init, Start
+D - 396 - Pre_DDR_clock_init, Delta
+B - 509045 - ddr_initialize_device, Start
+B - 512766 - 8996 v3.x detected, Max frequency = 1.8 GHz
+B - 522373 - ddr_initialize_device, Delta
+B - 522404 - DDR ID, Rank 0, Rank 1, 0x6, 0x300, 0x300
+B - 526247 - Basic DDR tests done
+B - 594994 - clock_init, Start
+D - 274 - clock_init, Delta
+B - 598349 - Image Load, Start
+D - 4331 - QSEE Dev Config Image Loaded, Delta - (46008 Bytes)
+B - 603808 - Image Load, Start
+D - 5338 - APDP Image Loaded, Delta - (0 Bytes)
+B - 612409 - usb: UFS Serial - 2f490ecf
+B - 616801 - usb: fedl, vbus_low
+B - 620431 - Image Load, Start
+D - 55418 - QSEE Image Loaded, Delta - (1640572 Bytes)
+B - 675849 - Image Load, Start
+D - 2013 - SEC Image Loaded, Delta - (4096 Bytes)
+B - 683413 - sbl1_efs_handle_cookies, Start
+D - 457 - sbl1_efs_handle_cookies, Delta
+B - 691892 - Image Load, Start
+D - 14396 - QHEE Image Loaded, Delta - (254184 Bytes)
+B - 706319 - Image Load, Start
+D - 14061 - RPM Image Loaded, Delta - (223900 Bytes)
+B - 721111 - Image Load, Start
+D - 3233 - STI Image Loaded, Delta - (0 Bytes)
+B - 727913 - Image Load, Start
+D - 34709 - APPSBL Image Loaded, Delta - (748716 Bytes)
+B - 762713 - SBL1, End
+D - 680028 - SBL1, Delta
+S - Flash Throughput, 94000 KB/s (2959024 Bytes, 31250 us)
+S - DDR Frequency, 1017 MHz
+Android Bootloader - UART_DM Initialized!!!
+
+[0] BUILD_VERSION=
+[0] BUILD_DATE=16:07:51 - Nov 17 2017
+[0] welcome to lk
+[10] platform_init()
+[10] target_init()
+[10] RPM GLink Init
+[10] Opening RPM Glink Port success
+[10] Opening SSR Glink Port success
+[20] Glink Connection between APPS and RPM established
+[20] Glink Connection between APPS and RPM established
+[40] UFS init success
+[80] Qseecom Init Done in Appsbl
+[80] secure app region addr=0x86600000 size=0x2200000[90] TZ App region notif returned with status:0 addr:86600000 size:35651584
+[100] TZ App log region register returned with status:0 addr:916d4000 size:4096
+[100] Qseecom TZ Init Done in Appsbl
+[120] Loading cmnlib done
+[120] qseecom_start_app: Loading app keymaster for the first time
+[150] <8>keymaster: "\"KEYMASTER Init \""
+[160] Selected panel: none
+Skip panel configuration
+[160] pm8x41_get_is_cold_boot: cold boot
+[170] boot_verifier: Device is in ORANGE boot state.
+[180] Device is unlocked! Skipping verification...
+[180] Loading (boot) image (348160): start
+[190] Loading (boot) image (348160): done
+[190] use_signed_kernel=1, is_unlocked=1, is_tampered=0.
+[200] Your device has been unlocked and cant be trusted.
+Wait for 5 seconds before proceeding
+
+[5200] mdtp: mdtp_img loaded
+[5210] mdtp: is_test_mode: test mode is set to 1
+[5210] mdtp: read_metadata: SUCCESS
+[5230] LK SEC APP Handle: 0x1
+[5230] Return value from recv_data: 14
+[5240] Return value from recv_data: 14
+[5250] Return value from recv_data: 14
+[5260] DTB Total entry: 1, DTB version: 3
+[5260] Using DTB entry 0x00000123/00000000/0x00000018/0 for device 0x00000123/00030001/0x00010018/0
+[5270] cmdline: androidboot.bootdevice=624000.ufshc androidboot.verifiedbootstate=orange androidboot.veritymode=enforcing androidboot.serialno=2f490ecf androidboot.baseband=apq mdss_mdp.panel=0
+[5290] Updating device tree: start
+[5290] Updating device tree: done
+[5290] Return value from recv_data: 14
+[5300] RPM GLINK UnInit
+[5300] Qseecom De-Init Done in Appsbl
+[5300] booting linux @ 0x80080000, ramdisk @ 0x82200000 (0), tags/device tree @ 0x82000000
+[5310] Jumping to kernel via monitor
+
+U-Boot 2017.11-00145-ge895117 (Nov 29 2017 - 10:04:06 +0100)
+Qualcomm-DragonBoard 820C
+
+DRAM: 3 GiB
+PSCI: v1.0
+MMC: sdhci at 74a4900: 0
+In: serial at 75b0000
+Out: serial at 75b0000
+Err: serial at 75b0000
+Net: Net Initialization Skipped
+No ethernet found.
+Hit any key to stop autoboot: 0
+switch to partitions #0, OK
+mmc0 is current device
+Scanning mmc 0:1...
+Found /extlinux/extlinux.conf
+Retrieving file: /extlinux/extlinux.conf
+433 bytes read in 71 ms (5.9 KiB/s)
+1: nfs root
+
+Retrieving file: /uImage
+19397184 bytes read in 2024 ms (9.1 MiB/s)
+append: root=/dev/nfs rw nfsroot=192.168.1.2:/db820c/rootfs,v3,tcp rootwait ip=dhcp consoleblank=0 console=tty0 console=ttyMSM0,115200n8 earlyprintk earlycon=msm_serial_dm,0x75b0000 androidboot.bootdevice=624000.ufshc androidboot.verifiedbootstate=orange androidboot.ver0
+
+Retrieving file: /apq8096-db820c.dtb
+38134 bytes read in 37 ms (1005.9 KiB/s)
+
+## Booting kernel from Legacy Image at 95000000 ...
+ Image Name: Dragonboard820c
+ Image Type: AArch64 Linux Kernel Image (uncompressed)
+ Data Size: 19397120 Bytes = 18.5 MiB
+ Load Address: 80080000
+ Entry Point: 80080000
+ Verifying Checksum ... OK
+## Flattened Device Tree blob at 93000000
+ Booting using the fdt blob at 0x93000000
+ Loading Kernel Image ... OK
+ Using Device Tree in place at 0000000093000000, end 000000009300c4f5
+
+Starting kernel ...
+
+[ 0.000000] Booting Linux on physical CPU 0x0
+[ 0.000000] Linux version 4.11.3-30039-g5a922a1 (jramirez at igloo) (gcc version 6.3.1 20170404 (Linaro GCC 6.3-2017.05) ) #1 SMP PREEMPT Wed Oct 18 10:21:11 CEST 2017
+[ 0.000000] Boot CPU: AArch64 Processor [511f2112]
+[ 0.000000] earlycon: msm_serial_dm0 at MMIO 0x00000000075b0000 (options '')
+[ 0.000000] bootconsole [msm_serial_dm0] enabled
+[ 0.000000] efi: Getting EFI parameters from FDT:
+[ 0.000000] efi: UEFI not found.
+[ 0.000000] OF: reserved mem: OVERLAP DETECTED!
+[ 0.000000] adsp at 8ea00000 (0x000000008ea00000--0x0000000090400000) overlaps with gpu at 8f200000 (0x000000008f200000--0x000000008f300000)
+[ 0.000000] Reserved memory: created DMA memory pool at 0x000000008f200000, size 1 MiB
+[ 0.000000] OF: reserved mem: initialized node gpu at 8f200000, compatible id shared-dma-pool
+[ 0.000000] Reserved memory: created DMA memory pool at 0x0000000090400000, size 8 MiB
+[ 0.000000] OF: reserved mem: initialized node venus at 90400000, compatible id shared-dma-pool
+[ 0.000000] cma: Reserved 128 MiB at 0x00000000b8000000
+[ 0.000000] NUMA: No NUMA configuration found
+[ 0.000000] NUMA: Faking a node at [mem 0x0000000000000000-0x00000000bfffffff]
+[ 0.000000] NUMA: Adding memblock [0x80000000 - 0x857fffff] on node 0
+[ 0.000000] NUMA: Adding memblock [0x91800000 - 0xbfffffff] on node 0
+[ 0.000000] NUMA: Initmem setup node 0 [mem 0x80000000-0xbfffffff]
+[ 0.000000] NUMA: NODE_DATA [mem 0xb7fb6680-0xb7fb817f]
+[ 0.000000] Zone ranges:
+[ 0.000000] DMA [mem 0x0000000080000000-0x00000000bfffffff]
+[ 0.000000] Normal empty
+[ 0.000000] Movable zone start for each node
+[ 0.000000] Early memory node ranges
+[ 0.000000] node 0: [mem 0x0000000080000000-0x00000000857fffff]
+[ 0.000000] node 0: [mem 0x0000000091800000-0x00000000bfffffff]
+[ 0.000000] Initmem setup node 0 [mem 0x0000000080000000-0x00000000bfffffff]
+[ 0.000000] psci: probing for conduit method from DT.
+[ 0.000000] psci: PSCIv1.0 detected in firmware.
+[ 0.000000] psci: Using standard PSCI v0.2 function IDs
+[ 0.000000] psci: MIGRATE_INFO_TYPE not supported.
+[ 0.000000] percpu: Embedded 23 pages/cpu @ffff8000de9a3000 s57240 r8192 d28776 u94208
+[ 0.000000] pcpu-alloc: s57240 r8192 d28776 u94208 alloc=23*4096
+[ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
+[ 0.000000] Detected PIPT I-cache on CPU0
+[ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 720293
+[ 0.000000] Policy zone: Normal
+[ 0.000000] Kernel command line: root=/dev/nfs rw nfsroot=192.168.1.2:/db820c/rootfs,v3,tcp rootwait ip=dhcp consoleblank=0
+console=tty0 console=ttyMSM0,115200n8 earlyprintk earlycon=msm_serial_dm,0x75b0000 androidboot.bootdevice=624000.ufshc androidboot.verifiedbootstate=orange a
+ndroidboot.ver0
+[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
+[ 0.000000] software IO TLB [mem 0xd3fff000-0xd7fff000] (64MB) mapped at [ffff800053fff000-ffff800057ffefff]
+[ 0.000000] Memory: 2644172K/2926908K available (11196K kernel code, 1470K rwdata, 5132K rodata, 1088K init, 449K bss, 151664K reserved, 131072K cma-reser
+ved)
+[ 0.000000] Virtual kernel memory layout:
+[ 0.000000] modules : 0xffff000000000000 - 0xffff000008000000 ( 128 MB)
+[ 0.000000] vmalloc : 0xffff000008000000 - 0xffff7dffbfff0000 (129022 GB)
+[ 0.000000] .text : 0xffff000008080000 - 0xffff000008b70000 ( 11200 KB)
+[ 0.000000] .rodata : 0xffff000008b70000 - 0xffff000009080000 ( 5184 KB)
+[ 0.000000] .init : 0xffff000009080000 - 0xffff000009190000 ( 1088 KB)
+[ 0.000000] .data : 0xffff000009190000 - 0xffff0000092ffa00 ( 1471 KB)
+[ 0.000000] .bss : 0xffff0000092ffa00 - 0xffff00000937014c ( 450 KB)
+[ 0.000000] fixed : 0xffff7dfffe7fd000 - 0xffff7dfffec00000 ( 4108 KB)
+[ 0.000000] PCI I/O : 0xffff7dfffee00000 - 0xffff7dffffe00000 ( 16 MB)
+[ 0.000000] vmemmap : 0xffff7e0000000000 - 0xffff800000000000 ( 2048 GB maximum)
+[ 0.000000] 0xffff7e0000000000 - 0xffff7e00037a93c0 ( 55 MB actual)
+[ 0.000000] memory : 0xffff800000000000 - 0xffff8000dea4f000 ( 3562 MB)
+[ 0.000000] SLUB: HWalign=128, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
+[ 0.000000] Preemptible hierarchical RCU implementation.
+[ 0.000000] Build-time adjustment of leaf fanout to 64.
+[ 0.000000] RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=4.
+[ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=64, nr_cpu_ids=4
+[ 0.000000] NR_IRQS:64 nr_irqs:64 0
+[ 0.000000] GICv3: CPU0: found redistributor 0 region 0:0x0000000009c00000
+[ 0.000000] GICv2m: range[mem 0x09bd0000-0x09bd0fff], SPI[544:639]
+[ 0.000000] arm_arch_timer: Architected cp15 and mmio timer(s) running at 19.20MHz (virt/virt).
+[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x46d987e47, max_idle_ns: 440795202767 ns
+[ 0.000002] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 4398046511078ns
+
+[....]
+
+
+Some kernel information:
+
+root at linaro-developer:~# cat /proc/cpuinfo
+processor : 0
+BogoMIPS : 38.40
+Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
+CPU implementer : 0x51
+CPU architecture: 8
+CPU variant : 0x1
+CPU part : 0x211
+CPU revision : 2
+
+processor : 1
+BogoMIPS : 38.40
+Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
+CPU implementer : 0x51
+CPU architecture: 8
+CPU variant : 0x1
+CPU part : 0x211
+CPU revision : 2
+
+processor : 2
+BogoMIPS : 38.40
+Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
+CPU implementer : 0x51
+CPU architecture: 8
+CPU variant : 0x1
+CPU part : 0x205
+CPU revision : 2
+
+processor : 3
+BogoMIPS : 38.40
+Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
+CPU implementer : 0x51
+CPU architecture: 8
+CPU variant : 0x1
+CPU part : 0x205
+CPU revision : 2
+
+root at linaro-developer:~# uname -a
+Linux linaro-developer 4.11.3-30039-g5a922a1 #1 SMP PREEMPT Wed Oct 18 10:21:11 CEST 2017 aarch64 GNU/Linux
+
+root at linaro-developer:~# cat /proc/cmdline
+root=/dev/nfs rw nfsroot=192.168.1.2:/db820c/rootfs,v3,tcp rootwait ip=dhcp consoleblank=0 console=tty0 console=ttyMSM0,115200n8 earlyprintk earlycon=msm_serial_dm,0x75b0000 androidboot.bootdevice=624000.ufshc androidboot.verifiedbootstate=orange androidboot.ver0
+
+root at linaro-developer:~# cat /proc/meminfo
+MemTotal: 2776332 kB
+MemFree: 2593696 kB
+MemAvailable: 2561432 kB
+Buffers: 0 kB
+Cached: 94744 kB
+SwapCached: 0 kB
+Active: 43888 kB
+Inactive: 72972 kB
+Active(anon): 22968 kB
+Inactive(anon): 24616 kB
+Active(file): 20920 kB
+Inactive(file): 48356 kB
+Unevictable: 0 kB
+Mlocked: 0 kB
+SwapTotal: 0 kB
+SwapFree: 0 kB
+Dirty: 0 kB
+Writeback: 0 kB
+AnonPages: 22120 kB
+Mapped: 29284 kB
+Shmem: 25468 kB
+Slab: 32876 kB
+SReclaimable: 12924 kB
+SUnreclaim: 19952 kB
+KernelStack: 2144 kB
+PageTables: 928 kB
+NFS_Unstable: 0 kB
+Bounce: 0 kB
+WritebackTmp: 0 kB
+CommitLimit: 1388164 kB
+Committed_AS: 204192 kB
+VmallocTotal: 135290290112 kB
+VmallocUsed: 0 kB
+VmallocChunk: 0 kB
+AnonHugePages: 2048 kB
+ShmemHugePages: 0 kB
+ShmemPmdMapped: 0 kB
+CmaTotal: 131072 kB
+CmaFree: 130356 kB
+HugePages_Total: 0
+HugePages_Free: 0
+HugePages_Rsvd: 0
+HugePages_Surp: 0
+Hugepagesize: 2048 kB
diff --git a/board/qualcomm/dragonboard820c/u-boot.lds b/board/qualcomm/dragonboard820c/u-boot.lds
new file mode 100644
index 0000000..b84b4ac
--- /dev/null
+++ b/board/qualcomm/dragonboard820c/u-boot.lds
@@ -0,0 +1,106 @@
+/*
+ * Override linker script for fastboot-readable images
+ *
+ * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski at gmail.com>
+ *
+ * Based on arch/arm/cpu/armv8/u-boot.lds (Just add header)
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+OUTPUT_FORMAT("elf64-littleaarch64", "elf64-littleaarch64", "elf64-littleaarch64")
+OUTPUT_ARCH(aarch64)
+ENTRY(_arm64_header)
+SECTIONS
+{
+ . = 0x00000000;
+
+ . = ALIGN(8);
+ .text :
+ {
+ *(.__image_copy_start)
+ board/qualcomm/dragonboard820c/head.o (.text*)
+ CPUDIR/start.o (.text*)
+ *(.text*)
+ }
+
+ . = ALIGN(8);
+ .rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
+
+ . = ALIGN(8);
+ .data : {
+ *(.data*)
+ }
+
+ . = ALIGN(8);
+
+ . = .;
+
+ . = ALIGN(8);
+ .u_boot_list : {
+ KEEP(*(SORT(.u_boot_list*)));
+ }
+
+ . = ALIGN(8);
+
+ .efi_runtime : {
+ __efi_runtime_start = .;
+ *(efi_runtime_text)
+ *(efi_runtime_data)
+ __efi_runtime_stop = .;
+ }
+
+ .efi_runtime_rel : {
+ __efi_runtime_rel_start = .;
+ *(.relaefi_runtime_text)
+ *(.relaefi_runtime_data)
+ __efi_runtime_rel_stop = .;
+ }
+
+ . = ALIGN(8);
+
+ .image_copy_end :
+ {
+ *(.__image_copy_end)
+ }
+
+ . = ALIGN(8);
+
+ .rel_dyn_start :
+ {
+ *(.__rel_dyn_start)
+ }
+
+ .rela.dyn : {
+ *(.rela*)
+ }
+
+ .rel_dyn_end :
+ {
+ *(.__rel_dyn_end)
+ }
+
+ _end = .;
+
+ . = ALIGN(8);
+
+ .bss_start : {
+ KEEP(*(.__bss_start));
+ }
+
+ .bss : {
+ *(.bss*)
+ . = ALIGN(8);
+ }
+
+ .bss_end : {
+ KEEP(*(.__bss_end));
+ }
+
+ /DISCARD/ : { *(.dynsym) }
+ /DISCARD/ : { *(.dynstr*) }
+ /DISCARD/ : { *(.dynamic*) }
+ /DISCARD/ : { *(.plt*) }
+ /DISCARD/ : { *(.interp*) }
+ /DISCARD/ : { *(.gnu*) }
+}
diff --git a/configs/dragonboard820c_defconfig b/configs/dragonboard820c_defconfig
new file mode 100644
index 0000000..788ff28
--- /dev/null
+++ b/configs/dragonboard820c_defconfig
@@ -0,0 +1,36 @@
+CONFIG_ARM=y
+CONFIG_ARM_SMCCC=y
+CONFIG_ARCH_SNAPDRAGON=y
+CONFIG_TARGET_DRAGONBOARD820C=y
+CONFIG_IDENT_STRING="\nQualcomm-DragonBoard 820C"
+CONFIG_DEFAULT_DEVICE_TREE="dragonboard820c"
+CONFIG_USE_BOOTARGS=y
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_BOOTARGS="console=ttyMSM0,115200n8"
+CONFIG_SYS_PROMPT="dragonboard820c => "
+CONFIG_HUSH_PARSER=y
+CONFIG_CMD_BOOTEFI=y
+CONFIG_EFI_LOADER=y
+CONFIG_CMD_BOOTEFI_HELLO=y
+CONFIG_CMD_PXE=y
+CONFIG_CMD_FS_GENERIC=y
+CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_MD5SUM=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_PART=y
+CONFIG_CMD_TIMER=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_GPT=y
+CONFIG_CMD_MMC=y
+CONFIG_OF_CONTROL=y
+CONFIG_MSM_SERIAL=y
+CONFIG_MMC_SDHCI_MSM=y
+CONFIG_MMC_SDHCI=y
+CONFIG_DM_MMC=y
+CONFIG_CLK=y
+CONFIG_PSCI_RESET=y
+CONFIG_ENV_IS_IN_EXT4=y
+CONFIG_ENV_EXT4_INTERFACE="mmc"
+CONFIG_ENV_EXT4_DEVICE_AND_PART="0:1"
+CONFIG_ENV_EXT4_FILE="/uboot.env"
diff --git a/include/configs/dragonboard820c.h b/include/configs/dragonboard820c.h
new file mode 100644
index 0000000..76bcaf8
--- /dev/null
+++ b/include/configs/dragonboard820c.h
@@ -0,0 +1,72 @@
+/*
+ * Board configuration file for Dragonboard 410C
+ *
+ * (C) Copyright 2017 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz at linaro.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __CONFIGS_DRAGONBOARD820C_H
+#define __CONFIGS_DRAGONBOARD820C_H
+
+#include <linux/sizes.h>
+#include <asm/arch/sysmap-apq8096.h>
+
+/* Physical Memory Map */
+#define CONFIG_NR_DRAM_BANKS 2
+
+#define PHYS_SDRAM_SIZE 0xC0000000
+#define PHYS_SDRAM_1 0x80000000
+#define PHYS_SDRAM_1_SIZE 0x60000000
+#define PHYS_SDRAM_2 0x100000000
+#define PHYS_SDRAM_2_SIZE 0x5ea4ffff
+
+#define CONFIG_SYS_SDRAM_BASE PHYS_SDRAM_1
+#define CONFIG_SYS_TEXT_BASE 0x80080000
+#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + 0x7fff0)
+#define CONFIG_SYS_LOAD_ADDR (CONFIG_SYS_SDRAM_BASE + 0x80000)
+#define CONFIG_SYS_BOOTM_LEN SZ_64M
+#define CONFIG_SYS_LDSCRIPT "board/qualcomm/dragonboard820c/u-boot.lds"
+
+/* Generic Timer Definitions */
+#define COUNTER_FREQUENCY 19000000
+
+/* Partition table support */
+#define HAVE_BLOCK_DEVICE
+
+/* BOOTP options */
+#define CONFIG_BOOTP_BOOTFILESIZE
+
+#ifndef CONFIG_SPL_BUILD
+#include <config_distro_defaults.h>
+#include <config_distro_bootcmd.h>
+#endif
+
+#define BOOT_TARGET_DEVICES(func) \
+ func(MMC, mmc, 0)
+
+#define CONFIG_EXTRA_ENV_SETTINGS \
+ "loadaddr=0x95000000\0" \
+ "fdt_high=0xffffffffffffffff\0" \
+ "initrd_high=0xffffffffffffffff\0" \
+ "linux_image=uImage\0" \
+ "kernel_addr_r=0x95000000\0"\
+ "fdtfile=qcom/apq8096-db820c.dtb\0" \
+ "fdt_addr_r=0x93000000\0"\
+ "ramdisk_addr_r=0x91000000\0"\
+ "scriptaddr=0x90000000\0"\
+ "pxefile_addr_r=0x90100000\0"\
+ BOOTENV
+
+#define CONFIG_EXT4_WRITE
+#define CONFIG_ENV_SIZE 0x4000
+#define CONFIG_ENV_VARS_UBOOT_CONFIG
+
+/* Size of malloc() pool */
+#define CONFIG_SYS_MALLOC_LEN (CONFIG_ENV_SIZE + SZ_8M)
+
+/* Monitor Command Prompt */
+#define CONFIG_SYS_CBSIZE 512
+#define CONFIG_SYS_MAXARGS 64
+
+#endif
--
2.7.4
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