On 08:26 Sun 14 Apr , Krzysztof Kozlowski wrote:
> On 12/03/2024 10:12, Andrea della Porta wrote:
> > BCM2711 has 4 DMA channels with a 40-bit address range, allowing them
> > to access the full 4GB of memory on a Pi 4. Adding a new node to make
> > use of the DMA channels capable of 40 bit addressing.
> >
> > Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
> > Signed-off-by: Andrea della Porta <andrea.porta@xxxxxxxx>
> > ---
> > arch/arm/boot/dts/broadcom/bcm2711.dtsi | 16 ++++++++++++++++
> > 1 file changed, 16 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/broadcom/bcm2711.dtsi b/arch/arm/boot/dts/broadcom/bcm2711.dtsi
> > index 22c7f1561344..d98e3cf0c569 100644
> > --- a/arch/arm/boot/dts/broadcom/bcm2711.dtsi
> > +++ b/arch/arm/boot/dts/broadcom/bcm2711.dtsi
> > @@ -552,6 +552,22 @@ scb {
> > ranges = <0x0 0x7c000000 0x0 0xfc000000 0x03800000>,
> > <0x6 0x00000000 0x6 0x00000000 0x40000000>;
> >
> > + dma40: dma-controller@7e007b00 {
> > + compatible = "brcm,bcm2711-dma";
> > + reg = <0x0 0x7e007b00 0x400>;
> > + interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>, /* dma4 11 */
> > + <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>, /* dma4 12 */
> > + <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>, /* dma4 13 */
> > + <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>; /* dma4 14 */
> > + interrupt-names = "dma11",
> > + "dma12",
> > + "dma13",
> > + "dma14";
> > + #dma-cells = <1>;
> > + /* The VPU firmware uses DMA channel 11 for VCHIQ */
> > + brcm,dma-channel-mask = <0x7000>;
>
> Isn't one of your commits saying - this property is replaced?
True. The next patchset revision will drop 'brcm,' prefix.
Many thanks for pointing that out.
Andrea
>
> Best regards,
> Krzysztof
>
