[yocto] [meta-raspberrypi][PATCH] sdcard_image-rpi.bbclass: deploy vfat partition

[Khem Raj]

On Fri, Jun 16, 2017 at 12:12 PM, Matthew McClintock
<msm-oss at mcclintock.net> wrote:
> This is useful to update the bootloader/vfat partition from u-boot when
> you don't want to update everything:
>
> U-Boot> tftpboot 0x1000000 tmp/0VXje
> Waiting for Ethernet connection... done.
> Using sms0 device
> TFTP from server 192.168.0.1; our IP address is 192.168.0.26
> Filename 'image.vfat'.
> Load address: 0x1000000
> Loading: ##################################################  40 MiB
>          2.1 MiB/s
> done
> Bytes transferred = 41943040 (2800000 hex)
> U-Boot> mmc part
>
> Partition Map for MMC device 0  --   Partition Type: DOS
>
> Part    Start Sector    Num Sectors     UUID            Type
>   1     8192            81920           a63a4fbc-01     0c Boot
>   2     90112           163840          a63a4fbc-02     83
> U-Boot> mmc erase 0x2000 0x14000
>
> MMC erase: dev # 0, block # 8192, count 81920 ... 81920 blocks erased:
> OK
> U-Boot> mmc write 0x1000000 0x2000 0x14000
>
> MMC write: dev # 0, block # 8192, count 81920 ... 81920 blocks written:
> OK
> U-Boot>
>
> Signed-off-by: Matthew McClintock <msm-oss at mcclintock.net>
> ---
>  classes/sdcard_image-rpi.bbclass | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/classes/sdcard_image-rpi.bbclass b/classes/sdcard_image-rpi.bbclass
> index af3e807..27a0dfc 100644
> --- a/classes/sdcard_image-rpi.bbclass
> +++ b/classes/sdcard_image-rpi.bbclass
> @@ -72,6 +72,10 @@ SDIMG = "${IMGDEPLOYDIR}/${IMAGE_NAME}.rootfs.rpi-sdimg"
>  # Additional files and/or directories to be copied into the vfat partition from the IMAGE_ROOTFS.
>  FATPAYLOAD ?= ""
>
> +# SD card vfat partition image name
> +SDIMG_VFAT = "${IMGDEPLOYDIR}/${IMAGE_NAME}.vfat"
> +SDIMG_LINK_VFAT = "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.vfat"
> +
>  IMAGE_CMD_rpi-sdimg () {
>
>         # Align partitions
> @@ -145,6 +149,10 @@ IMAGE_CMD_rpi-sdimg () {
>         echo "${IMAGE_NAME}" > ${WORKDIR}/image-version-info
>         mcopy -i ${WORKDIR}/boot.img -v ${WORKDIR}/image-version-info ::
>
> +        # Deploy vfat partition
> +        cp ${WORKDIR}/boot.img ${SDIMG_VFAT}
> +        ln -sf ${SDIMG_VFAT} ${SDIMG_LINK_VFAT}
> +

it is of use if I am not using u-boot ? is there any penalty ?

>         # Burn Partitions
>         dd if=${WORKDIR}/boot.img of=${SDIMG} conv=notrunc seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
>         # If SDIMG_ROOTFS_TYPE is a .xz file use xzcat
> --
> 2.13.1
>
> --
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