[yocto] [meta-raspberrypi][PATCH v4 3/5] rpi-base.inc: support for .dtbo files for dtb overlays

[Andrei Gherzan]

On Tue, May 31, 2016 at 04:46:33AM +0800, Herve Jourdain wrote:
> Kernel 4.4.6+ on RaspberryPi support .dtbo files for overlays, instead of .dtb.
> Add support for both variants of overlays ("-overlay.dtb" and ".dtbo") for the default KERNEL_DEVICETREE variable
>
> Signed-off-by: Herve Jourdain <herve.jourdain at neuf.fr>
> ---
>  conf/machine/include/rpi-base.inc | 36 +++++++++++++++++++++++++++++++++++-
>  1 file changed, 35 insertions(+), 1 deletion(-)
>
> diff --git a/conf/machine/include/rpi-base.inc b/conf/machine/include/rpi-base.inc
> index 56ca83e..2c9d8e0 100644
> --- a/conf/machine/include/rpi-base.inc
> +++ b/conf/machine/include/rpi-base.inc
> @@ -16,7 +16,7 @@ XSERVER = " \
>      "
>
>  # Really supported starting from linux-raspberrypi 3.18.y only
> -KERNEL_DEVICETREE ?= " \
> +KERNEL_DEVICETREE_OVERLAYS_DTB = " \
>      bcm2708-rpi-b.dtb \
>      bcm2708-rpi-b-plus.dtb \
>      bcm2709-rpi-2-b.dtb \
> @@ -38,6 +38,40 @@ KERNEL_DEVICETREE ?= " \
>      overlays/w1-gpio-pullup-overlay.dtb \
>      overlays/pi3-miniuart-bt-overlay.dtb \
>      "
> +KERNEL_DEVICETREE_OVERLAYS_DTBO = " \
> +    bcm2708-rpi-b.dtb \
> +    bcm2708-rpi-b-plus.dtb \
> +    bcm2709-rpi-2-b.dtb \
> +    bcm2710-rpi-3-b.dtb \
> +    \
> +    overlays/hifiberry-amp.dtbo \
> +    overlays/hifiberry-dac.dtbo \
> +    overlays/hifiberry-dacplus.dtbo \
> +    overlays/hifiberry-digi.dtbo \
> +    overlays/i2c-rtc.dtbo \
> +    overlays/iqaudio-dac.dtbo \
> +    overlays/iqaudio-dacplus.dtbo \
> +    overlays/lirc-rpi.dtbo \
> +    overlays/pitft22.dtbo \
> +    overlays/pitft28-resistive.dtbo \
> +    overlays/pps-gpio.dtbo \
> +    overlays/rpi-ft5406.dtbo \
> +    overlays/w1-gpio.dtbo \
> +    overlays/w1-gpio-pullup.dtbo \
> +    overlays/pi3-miniuart-bt.dtbo \
> +    "
> +
> +def cmpver_strings(ver1, ver2, truevalue, falsevalue):
> +    from distutils.version import LooseVersion
> +    ver1 = ''.join(ch for ch in ver1 if ch in '0123456789.')
> +    ver2 = ''.join(ch for ch in ver2 if ch in '0123456789.')
> +    if LooseVersion(ver1) >= LooseVersion(ver2):
> +        return truevalue
> +    else:
> +        return falsevalue
> +
> +KERNEL_DEVICETREE ?= "${@cmpver_strings("${PREFERRED_VERSION_linux-raspberrypi}", "4.4", "${KERNEL_DEVICETREE_OVERLAYS_DTBO}", "${KERNEL_DEVICETREE_OVERLAYS_DTB}")}"
> +
>  KERNEL_IMAGETYPE ?= "Image"
>

Can we avoid this duplication by translating dtbo->dtb for kernels
before 4.4? And I would suggest doing this in
linux-raspberrypi-base.bbclass . What do you think? We should reuse code
there for version too.

>  MACHINE_FEATURES += "apm usbhost keyboard vfat ext2 screen touchscreen alsa bluetooth wifi sdio"
> --
> 2.7.4
>
> --
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--
Andrei Gherzan
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