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

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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@xxxxxxxxxx>
---

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@7e206000 {
+			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@7e207000 {
+			compatible = "brcm,bcm2835-pixelvalve1";
+			reg = <0x7e207000 0x100>;
+			interrupts = <2 14>; /* pwa1 */
+		};
+

Thanks

Stefan

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