[yocto] [meta-raspberrypi][PATCH v3 3/6] rpi-config: I2C support
Leon Anavi
leon at anavi.org
Sun Feb 28 09:02:26 PST 2016
Hi Petter,
On 2016-02-28 15:46, Petter Mabäcker wrote:
> With newer kernels (>=3.18) that supports device-trees I2C
> should be enabled with device-trees.
>
> This is now support by adding:
> ENABLE_I2C = "1"
> in local.conf
>
> This will enable the dtparams:
> i2c1
> i2c_arm
Nice, this is exactly what I needed. Actually, yesterday I was searching
how to enable I2C through local.conf on rpi. I hope your patch will be
soon merged.
Thanks, Leon
>
> Signed-off-by: Petter Mabäcker <petter at technux.se>
> ---
> README | 21 +++++++++++++--------
> recipes-bsp/bootfiles/rpi-config_git.bb | 6 ++++++
> 2 files changed, 19 insertions(+), 8 deletions(-)
>
> diff --git a/README b/README
> index a168692..8ef4e7a 100644
> --- a/README
> +++ b/README
> @@ -21,10 +21,11 @@ Contents:
> 2.G. Optional - Enable offline compositing support
> 2.H. Optional - Enable kgdb over console support
> 2.I. Optional - Enable SPI bus
> - 2.J. Images
> - 2.K. Boot to U-Boot
> - 2.L. Image with Initramfs
> - 2.M. Device tree support
> + 2.J. Optional - Enable I2C
> + 2.K. Images
> + 2.L. Boot to U-Boot
> + 2.M. Image with Initramfs
> + 2.N. Device tree support
> 3. Extra apps
> 3.A. omxplayer
> 4. Source code and mirrors
> @@ -151,8 +152,12 @@ ENABLE_KGDB = "1"
> When using device tree kernels, set this variable to enable the SPI
> bus
> ENABLE_SPI_BUS = "1"
>
> +2.J. Optional - Enable I2C
> +==========================
> +When using device tree kernels, set this variable to enable I2C
> +ENABLE_I2C = "1"
>
> -2.J. Images
> +2.K. Images
> ===========
> * rpi-hwup-image
> Hardware up image
> @@ -162,7 +167,7 @@ ENABLE_SPI_BUS = "1"
> Image based on rpi-basic-image which includes most of the packages
> in this
> layer and some media samples.
>
> -2.K. Boot to U-Boot
> +2.L. Boot to U-Boot
> ===================
> To have u-boot load kernel image, set in your local.conf
> KERNEL_IMAGETYPE = "uImage"
> @@ -170,7 +175,7 @@ KERNEL_IMAGETYPE = "uImage"
> This will make kernel.img be u-boot image which will load uImage.
> By default, kernel.img is the actual kernel image (ex. Image).
>
> -2.L. Image with Initramfs
> +2.M. Image with Initramfs
> =========================
> To build an initramfs image :
> * Set this 3 kernel variables (in linux-raspberrypi.inc for
> example)
> @@ -183,7 +188,7 @@ To build an initramfs image :
> * Set the meta-rasberrypi variable (in raspberrypi.conf for
> example)
> - KERNEL_INITRAMFS = "-initramfs"
>
> -2.M. Device tree support
> +2.N. Device tree support
> =========================
> Device tree for RPi is only supported when using linux-raspberrypi
> 3.18+
> kernels.
> diff --git a/recipes-bsp/bootfiles/rpi-config_git.bb
> b/recipes-bsp/bootfiles/rpi-config_git.bb
> index aa11b25..ccb9b7f 100644
> --- a/recipes-bsp/bootfiles/rpi-config_git.bb
> +++ b/recipes-bsp/bootfiles/rpi-config_git.bb
> @@ -72,6 +72,12 @@ do_deploy() {
> echo "# Enable SPI bus"
> >>${DEPLOYDIR}/bcm2835-bootfiles/config.txt
> echo "dtparam=spi=on"
> >>${DEPLOYDIR}/bcm2835-bootfiles/config.txt
> fi
> +
> + if [ -n "${ENABLE_I2C}" ]; then
> + echo "# Enable I2C"
> >>${DEPLOYDIR}/bcm2835-bootfiles/config.txt
> + echo "dtparam=i2c1=on"
> >>${DEPLOYDIR}/bcm2835-bootfiles/config.txt
> + echo "dtparam=i2c_arm=on"
> >>${DEPLOYDIR}/bcm2835-bootfiles/config.txt
> + fi
> }
>
> addtask deploy before do_package after do_install
> --
> 1.9.1
--
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