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

Andrei Gherzan andrei at gherzan.ro
Wed Jun 21 07:26:40 PDT 2017


On Sun, Jun 18, 2017 at 7:51 PM, Matthew McClintock <msm-oss at mcclintock.net>
wrote:

> On Sat, Jun 17, 2017 at 11:41 AM, Khem Raj <raj.khem at gmail.com> wrote:
> > On Sat, Jun 17, 2017 at 8:20 AM, Tom Rini <trini at konsulko.com> wrote:
> >> 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 ?
>
> Other than just having another thing copied into tmp there is no
> effect, even if you're not using u-boot.
>
> >>
> >> The stock firmware also uses a vfat partition, so this could just as
> >> easily hold those contents.
> >
> > yes it does, can it do the same operations like u-boot ?
>

I think what Khem is trying to say is if we don't need it (because I don't
think there is any use for it when using proprietary bootloader) can we
deploy it only in the case of uboot bootloader section?

P.S.: Would really be helpful to push a PR to github too so I can merge it
easier.

--
Andrei Gherzan
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