board: samsung: Add support for E850-96 board

Add support for WinLink E850-96 board [1]. It's based on Exynos850 SoC
and follows 96boards specification, so it's compatible with 96boards
mezzanine boards [2]. This patch enables next features:

  * Serial console
  * USI
  * PMU (muxing AP UART path)
  * Pinctrl
  * Clocks
  * Timer (ARMv8 architected)
  * Reset control

It's quite a minimal enablement. Features like MMC, USB and Ethernet
will be enabled later.

The rationale for config values is as follows:

  * TEXT_BASE = 0xf8800000

    That's where BL2 loads the U-Boot payload, so TEXT_BASE must be
    exactly this value. Overall the memory map is designed in a way to
    keep the bootloader in the upper 128 MiB area of RAM, which is
    0xf8000000..0xffffffff. That includes bootloader's code, stack,
    data, heap, MMU tables, etc. All the memory below that 128 MiB chunk
    can be used for storing boot images (0x80000000..0xf8000000).

  * CUSTOM_SYS_INIT_SP_ADDR = 0xf8c00000

    Just 4 MiB above the TEXT_BASE address, to leave enough space for
    U-Boot code and stack itself (grows downwards).

  * SYS_LOAD_ADDR = 0x80000000

    The beginning of RAM. That's where Linux kernel image must be
    loaded.

  * SYS_MALLOC_LEN = 0x81f000

    8 MiB for malloc() + ENV_SIZE (128 KiB)

  * SYS_MALLOC_F_LEN = 0x4000

    Increase malloc() pool size available before relocation from 8 KiB
    (default) to 16 KiB. Otherwise "alloc space exhausted" message
    appears in U-Boot log during board_init_f() stage. There are next
    reasons for doing so:

      1. Having "bootph-all" flags in some dts nodes leads to binding
         those during pre-relocation stage, and binding (DM) uses
         dynamic memory allocation
      2. clk-exynos850 driver uses CCF clocks, which in turn use dynamic
         memory allocation

Device tree file was imported from Linux kernel. All nodes and boot
phase flags added in exynos850-e850-96-u-boot.dtsi are only needed to
enable serial console:

  * oscclk -> cmu_top -> cmu_peri: generate UART/USI clocks
  * pinctrl_alive and uart1_pins: needed to mux UART pins
  * pmu_system_controller: configures AP UART path to uart1_pins
  * usi_uart: configures USI block to operate as a UART protocol
  * serial_0: enables serial console (UART)

[1] https://www.96boards.org/product/e850-96b/
[2] https://www.96boards.org/products/mezzanine/

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index b5c588c3363f20b918c331981e3c1a62410308eb..9ed751af4117f5873d3314ff276d2d1fec7bb59a 100644 (file)
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -31,6 +31,7 @@ dtb-$(CONFIG_EXYNOS7420) += exynos7420-espresso7420.dtb
 dtb-$(CONFIG_TARGET_A5Y17LTE) += exynos78x0-axy17lte.dtb
 dtb-$(CONFIG_TARGET_A3Y17LTE) += exynos78x0-axy17lte.dtb
 dtb-$(CONFIG_TARGET_A7Y17LTE) += exynos78x0-axy17lte.dtb
+dtb-$(CONFIG_TARGET_E850_96) += exynos850-e850-96.dtb
 
 dtb-$(CONFIG_ARCH_APPLE) += \
        t8103-j274.dtb \

diff --git a/arch/arm/dts/exynos850-e850-96-u-boot.dtsi b/arch/arm/dts/exynos850-e850-96-u-boot.dtsi
new file mode 100644 (file)
index 0000000..7ad11e9
--- /dev/null
+++ b/arch/arm/dts/exynos850-e850-96-u-boot.dtsi
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 Linaro Ltd.
+ */
+
+&cmu_top {
+       bootph-all;
+};
+
+&cmu_peri {
+       bootph-all;
+};
+
+&oscclk {
+       bootph-all;
+};
+
+&pinctrl_alive {
+       bootph-all;
+};
+
+&pmu_system_controller {
+       bootph-all;
+       samsung,uart-debug-1;
+};
+
+&serial_0 {
+       bootph-all;
+};
+
+&uart1_pins {
+       bootph-all;
+};
+
+&usi_uart {
+       bootph-all;
+};

diff --git a/arch/arm/dts/exynos850-e850-96.dts b/arch/arm/dts/exynos850-e850-96.dts
new file mode 100644 (file)
index 0000000..f074df8
--- /dev/null
+++ b/arch/arm/dts/exynos850-e850-96.dts
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * WinLink E850-96 board device tree source
+ *
+ * Copyright (C) 2018 Samsung Electronics Co., Ltd.
+ * Copyright (C) 2021 Linaro Ltd.
+ *
+ * Device tree source file for WinLink's E850-96 board which is based on
+ * Samsung Exynos850 SoC.
+ */
+
+/dts-v1/;
+
+#include "exynos850.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+       model = "WinLink E850-96 board";
+       compatible = "winlink,e850-96", "samsung,exynos850";
+
+       aliases {
+               mmc0 = &mmc_0;
+               serial0 = &serial_0;
+       };
+
+       chosen {
+               stdout-path = &serial_0;
+       };
+
+       connector {
+               compatible = "gpio-usb-b-connector", "usb-b-connector";
+               label = "micro-USB";
+               type = "micro";
+               vbus-supply = <&reg_usb_host_vbus>;
+               id-gpios = <&gpa0 0 GPIO_ACTIVE_LOW>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&micro_usb_det_pins>;
+
+               port {
+                       usb_dr_connector: endpoint {
+                               remote-endpoint = <&usb1_drd_sw>;
+                       };
+               };
+       };
+
+       /*
+        * RAM: 4 GiB (eMCP):
+        *   - 2 GiB at 0x80000000
+        *   - 2 GiB at 0x880000000
+        *
+        * 0xbab00000..0xbfffffff: secure memory (85 MiB).
+        */
+       memory@80000000 {
+               device_type = "memory";
+               reg = <0x0 0x80000000 0x3ab00000>,
+                     <0x0 0xc0000000 0x40000000>,
+                     <0x8 0x80000000 0x80000000>;
+       };
+
+       gpio-keys {
+               compatible = "gpio-keys";
+               pinctrl-names = "default";
+               pinctrl-0 = <&key_voldown_pins &key_volup_pins>;
+
+               volume-down-key {
+                       label = "Volume Down";
+                       linux,code = <KEY_VOLUMEDOWN>;
+                       gpios = <&gpa1 0 GPIO_ACTIVE_LOW>;
+               };
+
+               volume-up-key {
+                       label = "Volume Up";
+                       linux,code = <KEY_VOLUMEUP>;
+                       gpios = <&gpa0 7 GPIO_ACTIVE_LOW>;
+               };
+       };
+
+       leds {
+               compatible = "gpio-leds";
+
+               /* HEART_BEAT_LED */
+               user_led1: led-1 {
+                       label = "yellow:user1";
+                       gpios = <&gpg2 2 GPIO_ACTIVE_HIGH>;
+                       color = <LED_COLOR_ID_YELLOW>;
+                       function = LED_FUNCTION_HEARTBEAT;
+                       linux,default-trigger = "heartbeat";
+               };
+
+               /* eMMC_LED */
+               user_led2: led-2 {
+                       label = "yellow:user2";
+                       gpios = <&gpg2 3 GPIO_ACTIVE_HIGH>;
+                       color = <LED_COLOR_ID_YELLOW>;
+                       linux,default-trigger = "mmc0";
+               };
+
+               /* SD_LED */
+               user_led3: led-3 {
+                       label = "white:user3";
+                       gpios = <&gpg2 4 GPIO_ACTIVE_HIGH>;
+                       color = <LED_COLOR_ID_WHITE>;
+                       function = LED_FUNCTION_SD;
+                       linux,default-trigger = "mmc2";
+               };
+
+               /* WIFI_LED */
+               wlan_active_led: led-4 {
+                       label = "yellow:wlan";
+                       gpios = <&gpg2 6 GPIO_ACTIVE_HIGH>;
+                       color = <LED_COLOR_ID_YELLOW>;
+                       function = LED_FUNCTION_WLAN;
+                       linux,default-trigger = "phy0tx";
+                       default-state = "off";
+               };
+
+               /* BLUETOOTH_LED */
+               bt_active_led: led-5 {
+                       label = "blue:bt";
+                       gpios = <&gpg2 7 GPIO_ACTIVE_HIGH>;
+                       color = <LED_COLOR_ID_BLUE>;
+                       function = LED_FUNCTION_BLUETOOTH;
+                       linux,default-trigger = "hci0-power";
+                       default-state = "off";
+               };
+       };
+
+       /* TODO: Remove this once PMIC is implemented  */
+       reg_dummy: regulator-0 {
+               compatible = "regulator-fixed";
+               regulator-name = "dummy_reg";
+       };
+
+       reg_usb_host_vbus: regulator-1 {
+               compatible = "regulator-fixed";
+               regulator-name = "usb_host_vbus";
+               regulator-min-microvolt = <5000000>;
+               regulator-max-microvolt = <5000000>;
+               gpio = <&gpa3 5 GPIO_ACTIVE_LOW>;
+       };
+
+       reserved-memory {
+               #address-cells = <2>;
+               #size-cells = <1>;
+               ranges;
+
+               ramoops@f0000000 {
+                       compatible = "ramoops";
+                       reg = <0x0 0xf0000000 0x200000>;
+                       record-size = <0x20000>;
+                       console-size = <0x20000>;
+                       ftrace-size = <0x100000>;
+                       pmsg-size = <0x20000>;
+               };
+       };
+
+       /*
+        * RTC clock (XrtcXTI); external, must be 32.768 kHz.
+        *
+        * TODO: Remove this once RTC clock is implemented properly as part of
+        *       PMIC driver.
+        */
+       rtcclk: clock-rtcclk {
+               compatible = "fixed-clock";
+               clock-output-names = "rtcclk";
+               #clock-cells = <0>;
+               clock-frequency = <32768>;
+       };
+};
+
+&cmu_hsi {
+       clocks = <&oscclk>, <&rtcclk>,
+                <&cmu_top CLK_DOUT_HSI_BUS>,
+                <&cmu_top CLK_DOUT_HSI_MMC_CARD>,
+                <&cmu_top CLK_DOUT_HSI_USB20DRD>;
+       clock-names = "oscclk", "rtcclk", "dout_hsi_bus",
+                     "dout_hsi_mmc_card", "dout_hsi_usb20drd";
+};
+
+&mmc_0 {
+       status = "okay";
+       mmc-hs200-1_8v;
+       mmc-hs400-1_8v;
+       cap-mmc-highspeed;
+       non-removable;
+       mmc-hs400-enhanced-strobe;
+       card-detect-delay = <200>;
+       clock-frequency = <800000000>;
+       bus-width = <8>;
+       samsung,dw-mshc-ciu-div = <3>;
+       samsung,dw-mshc-sdr-timing = <0 4>;
+       samsung,dw-mshc-ddr-timing = <2 4>;
+       samsung,dw-mshc-hs400-timing = <0 2>;
+
+       pinctrl-names = "default";
+       pinctrl-0 = <&sd0_clk_pins &sd0_cmd_pins &sd0_rdqs_pins &sd0_nreset_pins
+                    &sd0_bus1_pins &sd0_bus4_pins &sd0_bus8_pins>;
+};
+
+&oscclk {
+       clock-frequency = <26000000>;
+};
+
+&pinctrl_alive {
+       key_voldown_pins: key-voldown-pins {
+               samsung,pins = "gpa1-0";
+               samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+               samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+               samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
+       };
+
+       key_volup_pins: key-volup-pins {
+               samsung,pins = "gpa0-7";
+               samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+               samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+               samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
+       };
+
+       micro_usb_det_pins: micro-usb-det-pins {
+               samsung,pins = "gpa0-0";
+               samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
+               samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+       };
+};
+
+&rtc {
+       status = "okay";
+       clocks = <&cmu_apm CLK_GOUT_RTC_PCLK>, <&rtcclk>;
+       clock-names = "rtc", "rtc_src";
+};
+
+&serial_0 {
+       status = "okay";
+       pinctrl-names = "default";
+       pinctrl-0 = <&uart1_pins>;
+};
+
+&usbdrd {
+       status = "okay";
+       vdd10-supply = <&reg_dummy>;
+       vdd33-supply = <&reg_dummy>;
+};
+
+&usbdrd_dwc3 {
+       dr_mode = "otg";
+       usb-role-switch;
+       role-switch-default-mode = "host";
+
+       port {
+               usb1_drd_sw: endpoint {
+                       remote-endpoint = <&usb_dr_connector>;
+               };
+       };
+};
+
+&usbdrd_phy {
+       status = "okay";
+};
+
+&usi_uart {
+       samsung,clkreq-on; /* needed for UART mode */
+       status = "okay";
+};
+
+&watchdog_cl0 {
+       status = "okay";
+};
+
+&watchdog_cl1 {
+       status = "okay";
+};

diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 45fc6bb024b053c63e41bf18d12e6d23f265732d..af00ee1db07a3b1172e3d81fd9682a846198cfea 100644 (file)
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -2,7 +2,7 @@ if ARCH_EXYNOS
 
 config BOARD_COMMON
        def_bool y
-       depends on !TARGET_SMDKV310 && !TARGET_ARNDALE
+       depends on !TARGET_SMDKV310 && !TARGET_ARNDALE && !TARGET_E850_96
 
 config SPI_BOOTING
        bool
@@ -237,6 +237,22 @@ config  TARGET_A3Y17LTE
 endchoice
 endif
 
+if ARCH_EXYNOS9
+
+choice
+       prompt "EXYNOS9 board select"
+
+config TARGET_E850_96
+       bool "WinLink E850-96 board"
+       select ARM64
+       select CLK_EXYNOS
+       select OF_CONTROL
+       select PINCTRL
+       select PINCTRL_EXYNOS850
+
+endchoice
+endif
+
 config SYS_SOC
        default "exynos"
 
@@ -261,5 +277,6 @@ source "board/samsung/smdk5250/Kconfig"
 source "board/samsung/smdk5420/Kconfig"
 source "board/samsung/espresso7420/Kconfig"
 source "board/samsung/axy17lte/Kconfig"
+source "board/samsung/e850-96/Kconfig"
 
 endif

diff --git a/board/samsung/e850-96/Kconfig b/board/samsung/e850-96/Kconfig
new file mode 100644 (file)
index 0000000..f891a90
--- /dev/null
+++ b/board/samsung/e850-96/Kconfig
@@ -0,0 +1,16 @@
+if TARGET_E850_96
+
+config EXYNOS850
+       bool "Exynos850 SoC support"
+       default y
+
+config SYS_BOARD
+       default "e850-96"
+
+config SYS_VENDOR
+       default "samsung"
+
+config SYS_CONFIG_NAME
+       default "e850-96"
+
+endif

diff --git a/board/samsung/e850-96/MAINTAINERS b/board/samsung/e850-96/MAINTAINERS
new file mode 100644 (file)
index 0000000..e8b9365
--- /dev/null
+++ b/board/samsung/e850-96/MAINTAINERS
@@ -0,0 +1,9 @@
+WINLINK E850-96 BOARD
+M:     Sam Protsenko <semen.protsenko@linaro.org>
+S:     Maintained
+F:     arch/arm/dts/exynos850-e850-96-u-boot.dtsi
+F:     arch/arm/dts/exynos850-e850-96.dts
+F:     board/samsung/e850-96/
+F:     configs/e850-96_defconfig
+F:     doc/board/samsung/e850-96.rst
+F:     include/configs/e850-96.h

diff --git a/board/samsung/e850-96/Makefile b/board/samsung/e850-96/Makefile
new file mode 100644 (file)
index 0000000..301c223
--- /dev/null
+++ b/board/samsung/e850-96/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2020, Linaro Limited
+# Sam Protsenko <semen.protsenko@linaro.org>
+
+obj-y  := e850-96.o

diff --git a/board/samsung/e850-96/e850-96.c b/board/samsung/e850-96/e850-96.c
new file mode 100644 (file)
index 0000000..a00d81b
--- /dev/null
+++ b/board/samsung/e850-96/e850-96.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020, Linaro Limited
+ * Sam Protsenko <semen.protsenko@linaro.org>
+ */
+
+#include <init.h>
+
+int dram_init(void)
+{
+       return fdtdec_setup_mem_size_base();
+}
+
+int dram_init_banksize(void)
+{
+       return fdtdec_setup_memory_banksize();
+}
+
+int board_init(void)
+{
+       return 0;
+}

diff --git a/configs/e850-96_defconfig b/configs/e850-96_defconfig
new file mode 100644 (file)
index 0000000..bb41635
--- /dev/null
+++ b/configs/e850-96_defconfig
@@ -0,0 +1,21 @@
+CONFIG_ARM=y
+CONFIG_ARCH_CPU_INIT=y
+CONFIG_ARCH_EXYNOS=y
+CONFIG_TEXT_BASE=0xf8800000
+CONFIG_SYS_MALLOC_LEN=0x81f000
+CONFIG_SYS_MALLOC_F_LEN=0x4000
+CONFIG_ARCH_EXYNOS9=y
+CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0xf8c00000
+CONFIG_DEFAULT_DEVICE_TREE="exynos850-e850-96"
+CONFIG_SYS_LOAD_ADDR=0x80000000
+# CONFIG_AUTOBOOT is not set
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_NET is not set
+CONFIG_CLK_EXYNOS850=y
+# CONFIG_MMC is not set
+CONFIG_SOC_SAMSUNG=y
+CONFIG_EXYNOS_PMU=y
+CONFIG_EXYNOS_USI=y
+CONFIG_SYSRESET=y
+CONFIG_SYSRESET_SYSCON=y

diff --git a/doc/board/samsung/e850-96.rst b/doc/board/samsung/e850-96.rst
new file mode 100644 (file)
index 0000000..0cb9547
--- /dev/null
+++ b/doc/board/samsung/e850-96.rst
@@ -0,0 +1,87 @@
+.. SPDX-License-Identifier: GPL-2.0+
+.. sectionauthor:: Sam Protsenko <semen.protsenko@linaro.org>
+
+WinLink E850-96 board
+=====================
+
+Overview
+--------
+
+WinLink's E850-96 board [1]_ is based on Samsung Exynos850 SoC and follows
+96Boards Consumer Edition specification [2]_. That makes it possible to use
+96Boards mezzanine boards [3]_ along with it. It's an open-hardware board and
+the hardware design files [4]_ were published, along with the supported
+software [5]_ and related documentation.
+
+U-Boot can be used on E850-96 instead of the original Samsung LittleKernel based
+bootloader [6]_. Because FWBL1 [7]_ doesn't verify bootloader's signature, there
+is no need to sign a U-Boot binary. That means U-Boot binary can be flashed into
+``bootloader`` partition (instead of LittleKernel bootloader) and it will just
+work.
+
+Because BL2 bootloader already sets up DRAM and runs the final bootloader
+(U-Boot) from DRAM, there is no need in U-Boot SPL. It's enough to have only
+U-Boot proper (``u-boot.bin``).
+
+Boot Flow
+---------
+
+The boot path for Exynos850 is shown on the figure below.
+
+.. image:: img/exynos850-boot-architecture.svg
+  :alt: Exynos850 SoC boot flow
+
+Legend:
+
+* ``BL0``: Boot ROM code
+* ``BL1``: Software part of Boot ROM
+* ``EPBL``: Exynos Primary Boot Loader
+* ``BL2``: Initializes CMU and DRAM and runs the final bootloader
+* ``Bootloader``: Final bootloader (e.g. U-Boot); also called BL33 in terms of
+  ARM boot flow
+* ``EL3_MON``: EL3 monitor (trusted firmware, handles SMC calls); also called
+  BL31 in terms of ARM boot flow
+* ``LDFW``: Loadable Firmware
+
+Build Procedure
+---------------
+
+.. warning::
+  At the moment both eMMC and USB features are not enabled in U-Boot. Flashing
+  U-Boot binary **WILL** effectively brick your board. The ``dltool`` [8]_ can
+  be used then to perform USB boot and flash LittleKernel bootloader binary [7]_
+  to unbrick and revive the board. Flashing U-Boot binary might be helpful for
+  developers or anybody who want to check current state of U-Boot enablement on
+  E850-96 (which is mostly serial console and related blocks).
+
+Build U-Boot binary from source code (using AArch64 baremetal GCC toolchain):
+
+.. prompt:: bash $
+
+  export PATH=<toolchain path>/bin:$PATH
+  export CROSS_COMPILE=<toolchain prefix>
+  make e850-96_defconfig
+  make
+
+Boot E850-96 board into fastboot mode as described in board software doc [9]_,
+and flash U-Boot binary into ``bootloader`` eMMC partition:
+
+.. prompt:: bash $
+
+  fastboot flash bootloader u-boot.bin
+  fastboot reboot
+
+U-Boot will boot up to the shell.
+
+References
+----------
+
+.. [1] https://www.96boards.org/product/e850-96b/
+.. [2] https://www.96boards.org/products/ce/
+.. [3] https://www.96boards.org/products/mezzanine/
+.. [4] https://www.96boards.org/documentation/consumer/e850-96b/hardware-docs/
+.. [5] https://gitlab.com/Linaro/96boards/e850-96/
+.. [6] https://gitlab.com/Linaro/96boards/e850-96/lk
+.. [7] https://gitlab.com/Linaro/96boards/e850-96/images
+.. [8] https://gitlab.com/Linaro/96boards/e850-96/tools/dltool
+.. [9] https://gitlab.com/Linaro/96boards/e850-96/doc

diff --git a/doc/board/samsung/img/exynos850-boot-architecture.svg b/doc/board/samsung/img/exynos850-boot-architecture.svg
new file mode 100644 (file)
index 0000000..c6e8504
--- /dev/null
+++ b/doc/board/samsung/img/exynos850-boot-architecture.svg
@@ -0,0 +1,1283 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Do not edit this file with editors other than draw.io -->
+
+<svg
+   version="1.1"
+   width="611px"
+   height="327px"
+   viewBox="-0.5 -0.5 611 327"
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diff --git a/doc/board/samsung/index.rst b/doc/board/samsung/index.rst
index 971805e20169d18ae9a3cb908bd5abea6b739b4d..a1c9636b05074605e01f841c5f032935b3c9097f 100644 (file)
--- a/doc/board/samsung/index.rst
+++ b/doc/board/samsung/index.rst
@@ -7,3 +7,4 @@ Samsung
    :maxdepth: 2
 
    axy17lte
+   e850-96

diff --git a/include/configs/e850-96.h b/include/configs/e850-96.h
new file mode 100644 (file)
index 0000000..4607b30
--- /dev/null
+++ b/include/configs/e850-96.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2020, Linaro Limited
+ * Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * Configuration for E850-96 board.
+ */
+
+#ifndef __E850_96_H
+#define __E850_96_H
+
+#endif /* __E850_96_H */