linux-kernel - Re: [PATCH v3 7/7] ARM: bcm2835: Add VC4 to the device tree.

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Date:	Sun, 11 Oct 2015 16:23:02 +0200
From:	Stefan Wahren <info@...egoodbye.de>
To:	Eric Anholt <eric@...olt.net>
Cc:	dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 7/7] ARM: bcm2835: Add VC4 to the device tree.

Am 09.10.2015 um 23:27 schrieb Eric Anholt:
> VC4 is the GPU (display and 3D) present on the 2835.
>
> Signed-off-by: Eric Anholt <eric@...olt.net>
> ---
>
> v2: Sort by register address, mark HDMI as disabled by default in the
>      SoC file and enable it from -rpi.
>
> v3: Add references to the pixel/HSM clocks for HDMI.  Rename
>      compatibility strings and clean up node names.
>
>   arch/arm/boot/dts/bcm2835-rpi.dtsi |  4 ++++
>   arch/arm/boot/dts/bcm2835.dtsi     | 42 ++++++++++++++++++++++++++++++++++++++
>   2 files changed, 46 insertions(+)
>
> diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi
> index 3572f03..dcaaee2 100644
> --- a/arch/arm/boot/dts/bcm2835-rpi.dtsi
> +++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi
> @@ -56,6 +56,10 @@
>   	status = "okay";
>   };
>
> +&hdmi {
> +	status = "okay";
> +};
> +
>   &sdhci {
>   	status = "okay";
>   	bus-width = <4>;
> diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi
> index 1e61eb7..21e354a9 100644
> --- a/arch/arm/boot/dts/bcm2835.dtsi
> +++ b/arch/arm/boot/dts/bcm2835.dtsi
> @@ -1,4 +1,5 @@
>   #include <dt-bindings/pinctrl/bcm2835.h>
> +#include <dt-bindings/gpio/gpio.h>
>   #include <dt-bindings/clock/bcm2835.h>
>   #include "skeleton.dtsi"
>
> @@ -149,6 +150,18 @@
>   			status = "disabled";
>   		};
>
> +		pixelvalve@...06000 {
> +			compatible = "brcm,bcm2835-pixelvalve0";
> +			reg = <0x7e206000 0x100>;
> +			interrupts = <2 13>; /* pwa2 */

According to BCM2835-ARM-Peripherals this should be pwa0.

Is it just a typo?
What does pwa mean?

> +		};
> +
> +		pixelvalve@...07000 {
> +			compatible = "brcm,bcm2835-pixelvalve1";
> +			reg = <0x7e207000 0x100>;
> +			interrupts = <2 14>; /* pwa1 */
> +		};
> +

Thanks

Stefan

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