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-...@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-...@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
--
_______________________________________________
yocto mailing list
yocto@yoctoproject.org
https://lists.yoctoproject.org/listinfo/yocto
