[yocto] [raspberrypi][rt] yocto Digest, Vol 81, Issue 118
Michael Wiesing
mwiesing at avantys.de
Mon Jun 26 04:57:29 PDT 2017
Am Montag, 26. Juni 2017 04:32 CEST, yocto-request at yoctoproject.org schrieb:
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>
> Today's Topics:
>
> 1. [meta-chip][PATCH V2 1/3] u-boot-chip: Deploy the
> sunxi-spl-with-ecc.bin file. (drew.moseley at mender.io)
> 2. [meta-chip][PATCH V2 0/3] Initial attempt at flashing
> instructions. (drew.moseley at mender.io)
> 3. [meta-chip][PATCH V2 2/3] chip: Build sunxi-tools-native.
> (drew.moseley at mender.io)
> 4. [meta-chip][PATCH V2 3/3] chip: Add chip-u-boot-scr recipe
> and flash script (drew.moseley at mender.io)
> 5. Current state of linux-raspberrypi-rt? (Paul D. DeRocco)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 25 Jun 2017 15:55:44 -0400
> From: drew.moseley at mender.io
> To: yocto at yoctoproject.org
> Subject: [yocto] [meta-chip][PATCH V2 1/3] u-boot-chip: Deploy the
> sunxi-spl-with-ecc.bin file.
> Message-ID:
> <25feab71125423652d0a966d0039280b9ec8fe48.1498420110.git.drew.moseley at mender.io>
>
>
> From: Drew Moseley <drew.moseley at mender.io>
>
> Signed-off-by: Drew Moseley <drew.moseley at mender.io>
> ---
> conf/machine/chip.conf | 1 +
> recipes-bsp/u-boot/u-boot-chip_git.bb | 6 ++++++
> 2 files changed, 7 insertions(+)
>
> diff --git a/conf/machine/chip.conf b/conf/machine/chip.conf
> index 0a45a2f..8f54067 100644
> --- a/conf/machine/chip.conf
> +++ b/conf/machine/chip.conf
> @@ -21,6 +21,7 @@ KERNEL_IMAGETYPE = "zImage"
> KERNEL_DEVICETREE = "sun5i-r8-chip.dtb"
>
> SPL_BINARY = "sunxi-spl.bin"
> +SPL_ECC_BINARY = "sunxi-spl-with-ecc.bin"
> UBOOT_BINARY = "u-boot-dtb.bin"
> UBOOT_MACHINE = "CHIP_defconfig"
>
> diff --git a/recipes-bsp/u-boot/u-boot-chip_git.bb b/recipes-bsp/u-boot/u-boot-chip_git.bb
> index 8e2be50..f12fae6 100644
> --- a/recipes-bsp/u-boot/u-boot-chip_git.bb
> +++ b/recipes-bsp/u-boot/u-boot-chip_git.bb
> @@ -19,7 +19,13 @@ SRC_URI = " \
> S = "${WORKDIR}/git"
>
> do_compile_append() {
> + install ${B}/spl/${SPL_ECC_BINARY} ${B}/${SPL_ECC_BINARY}
> install ${B}/spl/${SPL_BINARY} ${B}/${SPL_BINARY}
> }
>
> COMPATIBLE_MACHINE = "chip"
> +
> +do_deploy_append() {
> + install -m 644 ${B}/${SPL_ECC_BINARY} ${DEPLOYDIR}/${SPL_ECC_BINARY}-${PV}-${PR}
> + ln -sf ${SPL_ECC_BINARY}-${PV}-${PR} ${DEPLOYDIR}/${SPL_ECC_BINARY}
> +}
> \ No newline at end of file
> --
> 2.7.4
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sun, 25 Jun 2017 15:55:43 -0400
> From: drew.moseley at mender.io
> To: yocto at yoctoproject.org
> Subject: [yocto] [meta-chip][PATCH V2 0/3] Initial attempt at flashing
> instructions.
> Message-ID: <cover.1498420110.git.drew.moseley at mender.io>
>
> From: Drew Moseley <drew.moseley at mender.io>
>
> * V2:
>
> Updated README and layer dependencies.
>
> Added error checking to flashing script
>
> * V1:
>
> This set of patches adds the native tools and target components needed to
> reflash the CHIP boards. Additionally a shell script is added to the deploy
> directory showing how to kick off a flash update. It's not ideal as I've
> hardcoded a max size for the UBI image into the script and didn't see much
> of an alternative. It does function though.
>
> Drew
>
> The following changes since commit 0079e6ac10fc371d6f527270c23b887561f717aa:
>
> chip: Append to MACHINE_EXTRA_RRECOMMENDS rather than overwriting (2017-06-15 13:37:19 +0100)
>
> are available in the git repository at:
>
> git at github.com:drewmoseley/meta-chip.git flashing-instructions-v2
>
> for you to fetch changes up to ddbfd00d73ea022aaa02005393a326d8802dd64a:
>
> chip: Add chip-u-boot-scr recipe and flash script (2017-06-25 15:28:54 -0400)
>
> ----------------------------------------------------------------
> Drew Moseley (3):
> u-boot-chip: Deploy the sunxi-spl-with-ecc.bin file.
> chip: Build sunxi-tools-native.
> chip: Add chip-u-boot-scr recipe and flash script
>
> README | 94 ++++++++++++++++++++++++-
> conf/layer.conf | 3 +
> conf/machine/chip.conf | 3 +-
> recipes-bsp/chip-u-boot-scr/chip-u-boot-scr.bb | 89 +++++++++++++++++++++++
> recipes-bsp/chip-u-boot-scr/files/boot.cmd.full | 32 +++++++++
> recipes-bsp/chip-u-boot-scr/files/boot.cmd.in | 43 +++++++++++
> recipes-bsp/u-boot/u-boot-chip_git.bb | 7 ++
> 7 files changed, 269 insertions(+), 2 deletions(-)
> create mode 100644 recipes-bsp/chip-u-boot-scr/chip-u-boot-scr.bb
> create mode 100644 recipes-bsp/chip-u-boot-scr/files/boot.cmd.full
> create mode 100644 recipes-bsp/chip-u-boot-scr/files/boot.cmd.in
>
> Drew Moseley (3):
> u-boot-chip: Deploy the sunxi-spl-with-ecc.bin file.
> chip: Build sunxi-tools-native.
> chip: Add chip-u-boot-scr recipe and flash script
>
> README | 94 ++++++++++++++++++++++++-
> conf/layer.conf | 3 +
> conf/machine/chip.conf | 3 +-
> recipes-bsp/chip-u-boot-scr/chip-u-boot-scr.bb | 89 +++++++++++++++++++++++
> recipes-bsp/chip-u-boot-scr/files/boot.cmd.full | 32 +++++++++
> recipes-bsp/chip-u-boot-scr/files/boot.cmd.in | 43 +++++++++++
> recipes-bsp/u-boot/u-boot-chip_git.bb | 7 ++
> 7 files changed, 269 insertions(+), 2 deletions(-)
> create mode 100644 recipes-bsp/chip-u-boot-scr/chip-u-boot-scr.bb
> create mode 100644 recipes-bsp/chip-u-boot-scr/files/boot.cmd.full
> create mode 100644 recipes-bsp/chip-u-boot-scr/files/boot.cmd.in
>
> --
> 2.7.4
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sun, 25 Jun 2017 15:55:45 -0400
> From: drew.moseley at mender.io
> To: yocto at yoctoproject.org
> Subject: [yocto] [meta-chip][PATCH V2 2/3] chip: Build
> sunxi-tools-native.
> Message-ID:
> <cc067a3eae2ea57cd7935283428ac759d3e6a898.1498420110.git.drew.moseley at mender.io>
>
>
> From: Drew Moseley <drew.moseley at mender.io>
>
> Add LAYERDEPENDS on meta-sunxi and add the sunxi-tools-native
> pacakage to EXTRA_IMAGEDEPENDS.
>
> Signed-off-by: Drew Moseley <drew.moseley at mender.io>
> ---
> README | 3 +++
> conf/layer.conf | 3 +++
> conf/machine/chip.conf | 2 +-
> 3 files changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/README b/README
> index cccf59e..32f70b2 100644
> --- a/README
> +++ b/README
> @@ -14,6 +14,9 @@ This layer depends on:
> layers: meta
> branch: master
>
> + URI: git://github.com/linux-sunxi/meta-sunxi.git
> + branch: master
> +
>
> Patches
> =======
> diff --git a/conf/layer.conf b/conf/layer.conf
> index 5dad66e..3324908 100644
> --- a/conf/layer.conf
> +++ b/conf/layer.conf
> @@ -8,3 +8,6 @@ BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
> BBFILE_COLLECTIONS += "meta-chip"
> BBFILE_PATTERN_meta-chip = "^${LAYERDIR}/"
> BBFILE_PRIORITY_meta-chip = "6"
> +
> +# Add this to get access to sunxi-tools recipe
> +LAYERDEPENDS_meta-chip = "meta-sunxi"
> \ No newline at end of file
> diff --git a/conf/machine/chip.conf b/conf/machine/chip.conf
> index 8f54067..ae166f9 100644
> --- a/conf/machine/chip.conf
> +++ b/conf/machine/chip.conf
> @@ -5,7 +5,7 @@
> MACHINE_EXTRA_RRECOMMENDS = " kernel-modules"
> MACHINE_ESSENTIAL_EXTRA_RDEPENDS = " kernel-image kernel-devicetree"
>
> -EXTRA_IMAGEDEPENDS += "u-boot"
> +EXTRA_IMAGEDEPENDS += "u-boot sunxi-tools-native"
>
> DEFAULTTUNE ?= "cortexa8t-neon"
> include conf/machine/include/tune-cortexa8.inc
> --
> 2.7.4
>
>
>
> ------------------------------
>
> Message: 4
> Date: Sun, 25 Jun 2017 15:55:46 -0400
> From: drew.moseley at mender.io
> To: yocto at yoctoproject.org
> Subject: [yocto] [meta-chip][PATCH V2 3/3] chip: Add chip-u-boot-scr
> recipe and flash script
> Message-ID:
> <ddbfd00d73ea022aaa02005393a326d8802dd64a.1498420110.git.drew.moseley at mender.io>
>
>
> From: Drew Moseley <drew.moseley at mender.io>
>
> Add a U-Boot script to handle flashing the SPL, U-Boot
> and UBI root filesystem images into the onboard flash.
> Also generate a script showing how to execute the flash
> steps.
>
> Signed-off-by: Drew Moseley <drew.moseley at mender.io>
> ---
> README | 91 ++++++++++++++++++++++++-
> recipes-bsp/chip-u-boot-scr/chip-u-boot-scr.bb | 89 ++++++++++++++++++++++++
> recipes-bsp/chip-u-boot-scr/files/boot.cmd.full | 32 +++++++++
> recipes-bsp/chip-u-boot-scr/files/boot.cmd.in | 43 ++++++++++++
> recipes-bsp/u-boot/u-boot-chip_git.bb | 1 +
> 5 files changed, 255 insertions(+), 1 deletion(-)
> create mode 100644 recipes-bsp/chip-u-boot-scr/chip-u-boot-scr.bb
> create mode 100644 recipes-bsp/chip-u-boot-scr/files/boot.cmd.full
> create mode 100644 recipes-bsp/chip-u-boot-scr/files/boot.cmd.in
>
> diff --git a/README b/README
> index 32f70b2..d3ab815 100644
> --- a/README
> +++ b/README
> @@ -62,4 +62,93 @@ To build a machine supported by this BSP layer follow the next steps:
> II. Flashing a C.H.I.P. board
> ========================================
>
> -<TODO>
> +As part of the build including this BSP layer, a U-Boot script and a
> +shell script are created to assist in flashing your images to the CHIP
> +board. Note that this script assumes a maximum size for your UBI
> +image of 167772160 (0x0A000000) bytes. If your UBI image exceeds
> +that, then you will need to adapt this to your environment.
> +
> +To successfully run this script you will first need to set your board
> +into FEL mode. Insert a wire into the U14 header between pin 7 (FEL)
> +and GND. Then connect the board with a USB cable to your build
> +system. More details here:
> + https://docs.getchip.com/chip.html#flash-chip-with-an-os
> +
> +You need to specify the base filename of your UBI image using the
> +UBI_IMAGE shell variable before invoking the generated script as
> +follows:
> +
> +# UBI_IMAGE=chip-hwup-image-chip.ubi \
> + ./tmp/deploy/images/chip/flash_CHIP_board.sh
> +
> +This script will take some time to execute. The output of this script
> +as run on your host machine should look similar to the following:
> +
> + # UBI_IMAGE=chip-hwup-image-chip.ubi ./build/chip/tmp/deploy/images/chip/flash_CHIP_board.sh
> + 100% [================================================] 3537 kB, 513.9 kB/s
> + 100% [================================================] 619 kB, 551.1 kB/s
> + 100% [================================================] 2 kB, 476.0 kB/s
> + 100% [================================================] 71303 kB, 531.1 kB/s
> +
> +If you have a serial console connected to your board, you will see
> +progress and a message on the console indicating when flashing is
> +complete:
> +
> + U-Boot 2016.01 (Jun 20 2017 - 02:54:42 -0400) Allwinner Technology
> +
> + CPU: Allwinner A13 (SUN5I)
> + I2C: ready
> + DRAM: 512 MiB
> + NAND: 8192 MiB
> + video-mode 720x480-24 at 60 not available, falling back to 1024x768-24 at 60
> + Setting up a 720x480i composite-ntsc console (overscan 40x20)
> + In: serial
> + Out: serial
> + Err: serial
> + Net: usb_ether
> + starting USB...
> + No controllers found
> + Hit any key to stop autoboot: 0
> + (FEL boot)
> + ## Executing script at 43100000
> + Erasing NAND
> +
> + NAND erase.chip: device 0 whole chip
> + Skipping bad block at 0xeb000000
> + Skipping bad block at 0x1b1000000
> + Erasing at 0x1ffc00000 -- 100% complete.
> + OK
> + Writing SPL (with ECC) to NAND address 0x00000000
> +
> + NAND write: 3537408 bytes written: OK
> + Writing SPL (with ECC) to NAND address 0x400000
> +
> + NAND write: 3537408 bytes written: OK
> + Writing UBoot image to address 0x800000
> +
> + NAND write: device 0 offset 0x800000, size 0x97236
> + 619062 bytes written: OK
> + Enabling Splash
> + Setting Video Mode
> + Saving default environment
> + Saving Environment to NAND...
> + Erasing NAND...
> + Erasing at 0xc00000 -- 100% complete.
> + Writing to NAND... OK
> + Writing UBI rootfs to NAND address 0x1000000
> +
> + NAND write: device 0 offset 0x1000000, size 0xa000000
> + 167772160 bytes written: OK
> + ===========================================================
> + Flashing Complete. Please power down and disable FEL mode.
> + ===========================================================
> +
> +Additionally, once the image is properly flashed, the status LED on
> +the CHIP board will flash on and off every 2 seconds. This indicates
> +that it is safe to power down your board and disable FEL mode.
> +
> +WARNING: This will erase the entire contents of your CHIP board.
> +
> +NOTE: This setup is still compatible with the CHIP flashing utility
> +available at http://flash.getchip.com if you choose to reinstall the
> +stock images.
> diff --git a/recipes-bsp/chip-u-boot-scr/chip-u-boot-scr.bb b/recipes-bsp/chip-u-boot-scr/chip-u-boot-scr.bb
> new file mode 100644
> index 0000000..7f01ebd
> --- /dev/null
> +++ b/recipes-bsp/chip-u-boot-scr/chip-u-boot-scr.bb
> @@ -0,0 +1,89 @@
> +SUMMARY = "U-boot boot scripts for CHIP boards"
> +LICENSE = "MIT"
> +LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
> +COMPATIBLE_MACHINE = "chip"
> +
> +inherit deploy
> +
> +DEPENDS = "u-boot-mkimage-native"
> +
> +SRC_URI = "file://boot.cmd.in"
> +
> +NAND_FLASH_START_ADDR = "0x00000000"
> +SPL_MEMIMG_ADDR = "0x44000000"
> +UBOOT_MEMIMG_ADDR = "0x4a000000"
> +SPL_FLASH_UPPER_ADDR = "0x400000"
> +LED_I2C_CHIP = "0x34"
> +LED_I2C_ADDR = "0x93"
> +UBOOT_FLASH_ADDR = "0x800000"
> +UBI_MEMIMG_ADDR = "0x4b000000"
> +UBI_FLASH_ADDR = "0x1000000"
> +PAGE_SIZE = "16384"
> +OOB_SIZE = "1664"
> +SCRIPTADDR = "0x43100000"
> +UBI_SIZE="0x0A000000"
> +
> +do_compile[depends] += "u-boot-chip:do_deploy"
> +do_compile() {
> + PADDED_SPL_SIZE_BLOCKS=$(stat --dereference --printf="%s" "${DEPLOY_DIR_IMAGE}/${SPL_ECC_BINARY}")
> + PADDED_SPL_SIZE_BLOCKS=$(expr $PADDED_SPL_SIZE_BLOCKS / \( ${PAGE_SIZE} + ${OOB_SIZE} \))
> + PADDED_SPL_SIZE_BLOCKS=$(echo $PADDED_SPL_SIZE_BLOCKS | xargs printf "0x%08x")
> + PADDED_UBOOT_SIZE=$(stat --dereference --printf="%s" "${DEPLOY_DIR_IMAGE}/${UBOOT_BINARY}" | xargs printf "0x%08x")
> +
> + sed -e "s, at NAND_FLASH_START_ADDR@,${NAND_FLASH_START_ADDR},g" \
> + -e "s, at SPL_MEMIMG_ADDR@,${SPL_MEMIMG_ADDR},g" \
> + -e "s, at UBOOT_MEMIMG_ADDR@,${UBOOT_MEMIMG_ADDR},g" \
> + -e "s, at SPL_FLASH_UPPER_ADDR@,${SPL_FLASH_UPPER_ADDR},g" \
> + -e "s, at LED_I2C_CHIP@,${LED_I2C_CHIP},g" \
> + -e "s, at LED_I2C_ADDR@,${LED_I2C_ADDR},g" \
> + -e "s, at PADDED_SPL_SIZE_BLOCKS@,${PADDED_SPL_SIZE_BLOCKS},g" \
> + -e "s, at PADDED_UBOOT_SIZE@,${PADDED_UBOOT_SIZE},g" \
> + -e "s, at UBOOT_FLASH_ADDR@,${UBOOT_FLASH_ADDR},g" \
> + -e "s, at UBI_FLASH_ADDR@,${UBI_FLASH_ADDR},g" \
> + -e "s, at UBI_MEMIMG_ADDR@,${UBI_MEMIMG_ADDR},g" \
> + -e "s, at UBI_SIZE@,${UBI_SIZE},g" \
> + < "${WORKDIR}/boot.cmd.in" > "${WORKDIR}/boot.cmd"
> + mkimage -A arm -T script -C none -n "Boot script" -d "${WORKDIR}/boot.cmd" "${WORKDIR}/boot.scr"
> +}
> +
> +do_deploy() {
> + install -d ${DEPLOYDIR}
> + install -m 0644 ${WORKDIR}/boot.scr ${DEPLOYDIR}/boot.scr-${PV}-${PR}
> + ln -sf boot.scr-${PV}-${PR} ${DEPLOYDIR}/boot.scr
> +
> + cat > ${DEPLOYDIR}/flash_CHIP_board.sh-${PV}-${PR} <<-EOF
> + #!/bin/sh
> + #
> +
> + if [ ! -n "\${UBI_IMAGE}" ]; then
> + echo "Error: UBI_IMAGE environment variable unset."
> + echo "Please set UBI_IMAGE to the basename of the root filesystem image to deploy"
> + exit -1
> + elif [ ! -e "${DEPLOY_DIR_IMAGE}/\${UBI_IMAGE}" ]; then
> + echo "Error: UBI_IMAGE file \"${DEPLOY_DIR_IMAGE}/\${UBI_IMAGE}\" does not exist."
> + exit -1
> + else
> + CURRENT_UBI_SIZE=\$(stat --dereference --printf="%s" ${DEPLOY_DIR_IMAGE}/\${UBI_IMAGE})
> + MAX_UBI_SIZE=\$(printf %d ${UBI_SIZE})
> + if [ \${CURRENT_UBI_SIZE} -gt \${MAX_UBI_SIZE} ]; then
> + echo "Error: UBI_IMAGE file \"${DEPLOY_DIR_IMAGE}/\${UBI_IMAGE}\" is too large."
> + echo "Current file size is \${CURRENT_UBI_SIZE}"
> + echo "Max file size is \${MAX_UBI_SIZE}"
> + exit -1
> + fi
> + fi
> +
> + PADDED_SPL_SIZE_BLOCKS=$(stat --dereference --printf="%s" "${DEPLOY_DIR_IMAGE}/${SPL_ECC_BINARY}")
> + ${COMPONENTS_DIR}/x86_64/sunxi-tools-native/usr/bin/sunxi-fel spl ${DEPLOY_DIR_IMAGE}/${SPL_BINARY}
> + ${COMPONENTS_DIR}/x86_64/sunxi-tools-native/usr/bin/sunxi-fel --progress write ${SPL_MEMIMG_ADDR} ${DEPLOY_DIR_IMAGE}/${SPL_ECC_BINARY}
> + ${COMPONENTS_DIR}/x86_64/sunxi-tools-native/usr/bin/sunxi-fel --progress write ${UBOOT_MEMIMG_ADDR} ${DEPLOY_DIR_IMAGE}/${UBOOT_BINARY}
> + ${COMPONENTS_DIR}/x86_64/sunxi-tools-native/usr/bin/sunxi-fel --progress write ${SCRIPTADDR} ${DEPLOY_DIR_IMAGE}/boot.scr
> + ${COMPONENTS_DIR}/x86_64/sunxi-tools-native/usr/bin/sunxi-fel --progress write ${UBI_MEMIMG_ADDR} ${DEPLOY_DIR_IMAGE}/\${UBI_IMAGE}
> + ${COMPONENTS_DIR}/x86_64/sunxi-tools-native/usr/bin/sunxi-fel exe ${UBOOT_MEMIMG_ADDR}
> + EOF
> + chmod +x ${DEPLOYDIR}/flash_CHIP_board.sh-${PV}-${PR}
> +
> + ln -sf flash_CHIP_board.sh-${PV}-${PR} ${DEPLOYDIR}/flash_CHIP_board.sh
> +}
> +
> +addtask do_deploy after do_compile before do_build
> diff --git a/recipes-bsp/chip-u-boot-scr/files/boot.cmd.full b/recipes-bsp/chip-u-boot-scr/files/boot.cmd.full
> new file mode 100644
> index 0000000..9589c87
> --- /dev/null
> +++ b/recipes-bsp/chip-u-boot-scr/files/boot.cmd.full
> @@ -0,0 +1,32 @@
> +echo Scrubbing NAND
> +nand scrub -y 0x0 0x200000000
> +echo Writing SPL (with ECC) to NAND address 0x0
> +nand write.raw.noverify $SPL_MEM_ADDR 0x0 $PADDED_SPL_SIZE
> +echo Writing SPL (with ECC) to NAND address 0x400000
> +nand write.raw.noverify $SPL_MEM_ADDR 0x400000 $PADDED_SPL_SIZE
> +echo Writing UBoot image to address 0x800000
> +nand write $UBOOT_MEM_ADDR 0x800000 $PADDED_UBOOT_SIZE
> +
> +# Setup the default environment
> +setenv bootargs root=ubi0:rootfs rootfstype=ubifs rw earlyprintk ubi.mtd=4
> +setenv bootcmd 'mtdparts; ubi part UBI; ubifsmount ubi0:rootfs; ubifsload \$fdt_addr_r /boot/sun5i-r8-chip.dtb; ubifsload \$kernel_addr_r /boot/zImage; bootz \$kernel_addr_r - \$fdt_addr_r'
> +setenv fel_booted 0
> +
> +echo Enabling Splash
> +setenv stdout serial
> +setenv stderr serial
> +setenv splashpos m,m
> +
> +echo Setting Video Mode
> +setenv video-mode sunxi:640x480-24 at 60,monitor=composite-ntsc,overscan_x=40,overscan_y=20
> +
> +echo Saving default environment
> +saveenv
> +
> +echo Writing UBI rootfs to NAND address 0x1000000
> +nand write.slc-mode.trimffs $UBI_MEM_ADDR 0x1000000 $UBI_SIZE
> +
> +echo ===========================================================
> +echo Flashing Complete. Please power down and disable FEL mode.
> +echo ===========================================================
> +
> diff --git a/recipes-bsp/chip-u-boot-scr/files/boot.cmd.in b/recipes-bsp/chip-u-boot-scr/files/boot.cmd.in
> new file mode 100644
> index 0000000..dc060be
> --- /dev/null
> +++ b/recipes-bsp/chip-u-boot-scr/files/boot.cmd.in
> @@ -0,0 +1,43 @@
> +echo Erasing NAND
> +nand erase.chip
> +echo Writing SPL (with ECC) to NAND address @NAND_FLASH_START_ADDR@
> +nand write.raw.noverify @SPL_MEMIMG_ADDR@ @NAND_FLASH_START_ADDR@ @PADDED_SPL_SIZE_BLOCKS@
> +echo Writing SPL (with ECC) to NAND address @SPL_FLASH_UPPER_ADDR@
> +nand write.raw.noverify @SPL_MEMIMG_ADDR@ @SPL_FLASH_UPPER_ADDR@ @PADDED_SPL_SIZE_BLOCKS@
> +echo Writing UBoot image to address 0x800000
> +nand write @UBOOT_MEMIMG_ADDR@ @UBOOT_FLASH_ADDR@ @PADDED_UBOOT_SIZE@
> +
> +# Setup the default environment
> +setenv bootargs root=ubi0:rootfs rootfstype=ubifs rw earlyprintk ubi.mtd=4
> +setenv bootcmd_ubi 'mtdparts; ubi part UBI; ubifsmount ubi0:rootfs; ubifsload \$fdt_addr_r /boot/sun5i-r8-chip.dtb; ubifsload \$kernel_addr_r /boot/zImage; bootz \$kernel_addr_r - \$fdt_addr_r'
> +setenv boot_targets fel ubi usb0 pxe dhcp
> +setenv fel_booted 0
> +
> +echo Enabling Splash
> +setenv stdout serial
> +setenv stderr serial
> +setenv splashpos m,m
> +
> +echo Setting Video Mode
> +setenv video-mode sunxi:640x480-24 at 60,monitor=composite-ntsc,overscan_x=40,overscan_y=20
> +
> +echo Saving default environment
> +saveenv
> +
> +echo Writing UBI rootfs to NAND address 0x1000000
> +nand write.slc-mode.trimffs @UBI_MEMIMG_ADDR@ @UBI_FLASH_ADDR@ @UBI_SIZE@
> +
> +
> +echo ===========================================================
> +echo Flashing Complete. Please power down and disable FEL mode.
> +echo ===========================================================
> +
> +# Loop continually flashing the status LED
> +while true ; do
> + mw.l @SPL_MEMIMG_ADDR@ 0x00000000 1
> + i2c write @SPL_MEMIMG_ADDR@ @LED_I2C_CHIP@ @LED_I2C_ADDR@ 4
> + sleep 1
> Date: Sun, 25 Jun 2017 19:32:36 -0700
> From: "Paul D. DeRocco" <pderocco at ix.netcom.com>
> To: <yocto at yoctoproject.org>
> Subject: [yocto] Current state of linux-raspberrypi-rt?
> Message-ID: <23EE2924AFA4488992A7D0127F20147A at PAULD>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Google turns up a lot of stuff about this, but the latest I found was a
> thread from 1/5/17 that started with Trevor Woerner posting a 1MB patch,
> and that ended with him posting a message saying that it didn't actually
> work.
>
> Is there anything new on this? I'm trying to do some compute-intensive
> audio on an RPi3, and it really needs a real-time kernel.
>
> --
>
> Ciao, Paul D. DeRocco
> Paul mailto:pderocco at ix.netcom.com
I am using at the moment the raspberrypi and was able to patch with a rt patch downloaded from
https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.9/
Patching, Configuring, compiling. All seems to work. Having booted the Pi i can see via uname -a, that the rt-patch is applied. The performance seems to be very nice. What is google doing about this?
kind regards
Michael Wiesing
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