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

[Tom Rini]

On Fri, Jun 16, 2017 at 06:05:07PM -0700, Khem Raj wrote:
> 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 ?

The stock firmware also uses a vfat partition, so this could just as
easily hold those contents.

-- 
Tom