imx: Support i.MX91 11x11 FRDM board

Add i.MX91 11x11 FRDM Board support.
 - Four ddr scripts included w/o inline ecc feature. Support
   both 1gb and 2gb DDR
 - SDHC/EQOS/I2C/UART supported
 - PCA9451 supported, default nominal drive mode
 - Documentation added.

Signed-off-by: Joseph Guo <[email protected]>

2 files changed, 101 insertions, 0 deletions

diff --git a/doc/board/nxp/imx91_11x11_frdm.rst b/doc/board/nxp/imx91_11x11_frdm.rst
new file mode 100644
index 00000000000..e3a2fe9b662
--- /dev/null
+++ b/doc/board/nxp/imx91_11x11_frdm.rst
@@ -0,0 +1,100 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+imx91_frdm
+=======================
+
+U-Boot for the NXP i.MX91 11x11 FRDM Board
+
+Quick Start
+-----------
+
+- Get and Build the ARM Trusted firmware
+- Get the DDR firmware
+- Get ahab-container.img
+- Build U-Boot
+- Boot from the SD card
+- Boot using USB serial download (uuu)
+
+Get and Build the ARM Trusted firmware
+--------------------------------------
+
+Note: srctree is U-Boot source directory
+Get ATF from: https://github.com/nxp-imx/imx-atf/
+branch: lf_v2.10
+
+.. code-block:: bash
+
+   $ unset LDFLAGS
+   $ make PLAT=imx91 bl31
+   $ cp build/imx91/release/bl31.bin $(srctree)
+
+Get the DDR firmware
+--------------------
+
+.. code-block:: bash
+
+   $ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.21.bin
+   $ chmod +x firmware-imx-8.21.bin
+   $ ./firmware-imx-8.21.bin
+   $ cp firmware-imx-8.21/firmware/ddr/synopsys/lpddr4*.bin $(srctree)
+
+Get ahab-container.img
+---------------------------------------
+
+.. code-block:: bash
+
+   $ wget  https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-ele-imx-1.3.0-17945fc.bin
+   $ chmod +x firmware-ele-imx-1.3.0-17945fc.bin
+   $ ./firmware-ele-imx-1.3.0-17945fc.bin
+   $ cp firmware-ele-imx-1.3.0-17945fc/mx91a0-ahab-container.img $(srctree)
+
+Build U-Boot
+------------
+
+.. code-block:: bash
+
+   $ export CROSS_COMPILE=aarch64-poky-linux-
+   $ make imx91_11x11_frdm_defconfig or imx91_11x11_frdm_inline_ecc_defconfig
+   $ make
+
+- Inline ECC is to enable DDR ECC feature with imx91_11x11_frdm_inline_ecc_defconfig
+  Enable ECC will reduce DDR size by 1/8. For 1GB DRAM, available size will be 896MB.
+
+Burn the flash.bin to MicroSD card offset 32KB:
+
+.. code-block:: bash
+
+ $ dd if=flash.bin of=/dev/sd[x] bs=1k seek=32; sync
+
+Boot from the SD card
+---------------------
+
+- Configure SW1 boot switches to SD boot mode:
+  0011 SW1[3:0] - ("USDHC2 4-bit SD3.0" Boot Mode)
+- Insert the SD card in the SD slot (P13) of the board.
+- Connect a USB Type-C cable into the P16 Debug USB Port and connect
+  using a terminal emulator at 115200 bps, 8n1. The console will show up
+  at /dev/ttyACM0.
+- Power on the board by connecting a USB Type-C cable into the P1
+  Power USB Port.
+
+Boot using USB serial download (uuu)
+------------------------------------
+
+- Configure SW1 boot switches to serial download boot mode:
+  0001 SW1[3:0] - ("Serial downloader (USB)" Boot Mode)
+- Plug USB Type-C cable into the P2 device port.
+- Connect a USB Type-C cable into the P16 Debug USB Port and connect
+  using a terminal emulator at 115200 bps, 8n1. The console will show up
+  at /dev/ttyACM0.
+- Power on the board by connecting a USB Type-C cable into the P1
+  Power USB Port.
+- Use NXP Universal Update Utility `NXP Universal Update Utility`_ to boot or
+  flash the device. E.g. following command can be used to flash an image onto
+  the eMMC storage:
+
+.. code-block:: bash
+
+   $ uuu -V -b emmc_all <image file>
+
+.. _`NXP Universal Update Utility`: https://github.com/nxp-imx/mfgtools
\ No newline at end of file
diff --git a/doc/board/nxp/index.rst b/doc/board/nxp/index.rst
index 7b881961b65..01d3468a47d 100644
--- a/doc/board/nxp/index.rst
+++ b/doc/board/nxp/index.rst
@@ -13,6 +13,7 @@ NXP Semiconductors
    imx8qxp_mek
    imx8ulp_evk
    imx91_11x11_evk
+   imx91_11x11_frdm
    imx93_9x9_qsb
    imx93_11x11_evk
    imx93_frdm