[FAQ] TDA4VM: 如何从 QSPI 引导？

答：是的，支持从 QSPI 引导。默认情况下，U-Boot/SPL 配置为从 OSPI(OSPI0) 引导。因此，我们需要在 U-Boot 目录中进行以下更改：

From fa016786d99db486f14c491927ad582eb940467b Mon Sep 17 00:00:00 2001

From: Keerthy <j-keerthy@ti.com>

Date: Thu, 2 Sep 2021 10:06:31 +0530

Subject: [PATCH] configs: Enable QSPI

Enable QSPI

Signed-off-by: Keerthy <j-keerthy@ti.com>

---

 configs/j721e_evm_a72_defconfig | 1 +

 configs/j721e_evm_r5_defconfig  | 1 +

 2 files changed, 2 insertions(+)

diff --git a/configs/j721e_evm_a72_defconfig b/configs/j721e_evm_a72_defconfig

index 8f16ae354e..8c9631cd24 100644

--- a/configs/j721e_evm_a72_defconfig

+++ b/configs/j721e_evm_a72_defconfig

@@ -72,6 +72,7 @@ CONFIG_CMD_UBI=y

 CONFIG_OF_CONTROL=y

 CONFIG_SPL_OF_CONTROL=y

 CONFIG_DEFAULT_DEVICE_TREE="k3-j721e-common-proc-board"

+CONFIG_SF_DEFAULT_BUS=1

 CONFIG_OF_LIST="k3-j721e-common-proc-board k3-j721e-tps65917-proc-board"

 CONFIG_SPL_MULTI_DTB_FIT=y

 CONFIG_SPL_MULTI_DTB_FIT_NO_COMPRESSION=y

diff --git a/configs/j721e_evm_r5_defconfig b/configs/j721e_evm_r5_defconfig

index bb3d1a28c6..901d8b76ce 100644

--- a/configs/j721e_evm_r5_defconfig

+++ b/configs/j721e_evm_r5_defconfig

@@ -60,6 +60,7 @@ CONFIG_CMD_FAT=y

 CONFIG_OF_CONTROL=y

 CONFIG_SPL_OF_CONTROL=y

 CONFIG_DEFAULT_DEVICE_TREE="k3-j721e-r5-common-proc-board"

+CONFIG_SF_DEFAULT_BUS=1

 CONFIG_ENV_IS_IN_MMC=y

 CONFIG_SYS_RELOC_GD_ENV_ADDR=y

 CONFIG_DM=y

--

2.17.1

*****************************************************************************

cd $PSDKLA_PATH/board-support/u-boot-2020.01+gitAUTOINC+2781231a33-g2781231a33

git am 0001-configs-Enable-QSPI.patch.txt

cd ../..

make u-boot

cp board-support/u-boot_build/a72/tispl.bin board-support/u-boot_build/a72/u-boot.img board-support/prebuilt-binaries/sysfw.itb board-support/u-boot_build/r5/tiboot3.bin /media/$USER/boot/

将新编译的二进制文件复制到 SD 卡的引导分区中后，使用 SD Boot 引导至 u-boot 提示符：

DIP 开关设置：

SW8：10000010

SW9：00000000

引导至 U-Boot 提示符：

sf probe 1:0 /* this is for QSPI */

fatload mmc 1 ${loadaddr} tiboot3.bin; sf update $loadaddr 0x0 $filesize;

fatload mmc 1 ${loadaddr} tispl.bin; sf update $loadaddr 0x80000 $filesize;

fatload mmc 1 ${loadaddr} u-boot.img; sf update $loadaddr 0x280000 $filesize;

fatload mmc 1 ${loadaddr} sysfw.itb; sf update $loadaddr 0x6C0000 $filesize

刷写 QSPI 后，请关闭电路板并按如下所示更改 DIP 开关设置：

SW8：00000000

SW9：00100000

导通电路板。在从 SPI 引导时，您可以观察到以下情况：

U-Boot SPL 2020.01-00002-g8903f0640e-dirty (Aug 09 2021 - 15:42:23 +0530)

SYSFW ABI: 3.1 (firmware rev 0x0015 '21.1.1--v2021.01a (Terrific Lla')

Trying to boot from SPI

Loading Environment from MMC...*** Warning - No MMC card found, using default environment

Starting ATF on ARM64 core...

NOTICE:  BL31: v2.4(release):07.03.00.005-dirty

NOTICE:  BL31: Built : 00:15:40, Apr 10 2021

U-Boot SPL 2020.01-00002-g8903f0640e-dirty (Aug 09 2021 - 15:42:15 +0530)

SYSFW ABI: 3.1 (firmware rev 0x0015 '21.1.1--v2021.01a (Terrific Lla')

Detected: J7X-BASE-CPB rev E2

Detected: J7X-INFOTAN-EXP rev E3

Detected: J7X-VSC8514-ETH rev E2

Trying to boot from SPI

Can't get reset: -2

Software reset enable failed: -524

U-Boot 2020.01-00002-g8903f0640e-dirty (Aug 09 2021 - 15:42:15 +0530)

SoC:   J721E SR1.0

Model: Texas Instruments K3 J721E SoC

Board: J721EX-PM2-SOM rev E6

DRAM:  4 GiB

not found for dev hbmc-mux

Flash: 0 Bytes

MMC:   sdhci@4f80000: 0, sdhci@4fb0000: 1

Loading Environment from MMC...OK

In:    serial@2800000

Out:   serial@2800000

Err:   serial@2800000

Detected: J7X-BASE-CPB rev E2

Detected: J7X-INFOTAN-EXP rev E3

Detected: J7X-VSC8514-ETH rev E2

Net:   K3 CPSW: nuss_ver: 0x6BA00101 cpsw_ver: 0x6BA80100 ale_ver: 0x00293904 Ports:1 mdio_freq:1000000

Warning: ethernet@46000000 using MAC address from ROM

eth0: ethernet@46000000

Hit any key to stop autoboot:  0