Re: [PATCH v2 3/3] ARM: dts: bcm2711: Enable HWRNG support

Matthias Brugger
2019-11-19T11:16:11Z

On 19/11/2019 11:07, Nicolas Saenz Julienne wrote:
> Hi Stephen, thanks for the follow-up.
>
> On Mon, 2019-11-18 at 22:14 -0800, Stephen Brennan wrote:
>> BCM2711 features a RNG200 hardware random number generator block, which is
>> different from the BCM283x from which it inherits. Move the rng block from
>> BCM283x into a separate common file, and update the rng declaration of
>> BCM2711.
>>
>> Signed-off-by: Stephen Brennan <stephen@brennan.io>
>> ---
>
> It's petty in this case but you should add a list of changes here too.
>
>> arch/arm/boot/dts/bcm2711.dtsi | 6 +++---
>> arch/arm/boot/dts/bcm2835.dtsi | 1 +
>> arch/arm/boot/dts/bcm2836.dtsi | 1 +
>> arch/arm/boot/dts/bcm2837.dtsi | 1 +
>> arch/arm/boot/dts/bcm283x-common.dtsi | 11 +++++++++++
>> arch/arm/boot/dts/bcm283x.dtsi | 6 ------
>> 6 files changed, 17 insertions(+), 9 deletions(-)
>> create mode 100644 arch/arm/boot/dts/bcm283x-common.dtsi
>>
>> diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
>> index ac83dac2e6ba..4975567e948e 100644
>> --- a/arch/arm/boot/dts/bcm2711.dtsi
>> +++ b/arch/arm/boot/dts/bcm2711.dtsi
>> @@ -92,10 +92,10 @@ pm: watchdog@7e100000 {
>> };
>>
>> rng@7e104000 {
>> + compatible = "brcm,bcm2711-rng200";
>> + reg = <0x7e104000 0x28>;
>> interrupts = <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>;
>> -
>> - /* RNG is incompatible with brcm,bcm2835-rng */
>> - status = "disabled";
>> + status = "okay";
>> };
>>
>> uart2: serial@7e201400 {
>> diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi
>> index 53bf4579cc22..f7b2f46e307d 100644
>> --- a/arch/arm/boot/dts/bcm2835.dtsi
>> +++ b/arch/arm/boot/dts/bcm2835.dtsi
>> @@ -1,5 +1,6 @@
>> // SPDX-License-Identifier: GPL-2.0
>> #include "bcm283x.dtsi"
>> +#include "bcm283x-common.dtsi"
>> #include "bcm2835-common.dtsi"
>>
>> / {
>> diff --git a/arch/arm/boot/dts/bcm2836.dtsi b/arch/arm/boot/dts/bcm2836.dtsi
>> index 82d6c4662ae4..a85374195796 100644
>> --- a/arch/arm/boot/dts/bcm2836.dtsi
>> +++ b/arch/arm/boot/dts/bcm2836.dtsi
>> @@ -1,5 +1,6 @@
>> // SPDX-License-Identifier: GPL-2.0
>> #include "bcm283x.dtsi"
>> +#include "bcm283x-common.dtsi"
>> #include "bcm2835-common.dtsi"
>>
>> / {
>> diff --git a/arch/arm/boot/dts/bcm2837.dtsi b/arch/arm/boot/dts/bcm2837.dtsi
>> index 9e95fee78e19..045d78ffea08 100644
>> --- a/arch/arm/boot/dts/bcm2837.dtsi
>> +++ b/arch/arm/boot/dts/bcm2837.dtsi
>> @@ -1,4 +1,5 @@
>> #include "bcm283x.dtsi"
>> +#include "bcm283x-common.dtsi"
>> #include "bcm2835-common.dtsi"
>>
>> / {
>> diff --git a/arch/arm/boot/dts/bcm283x-common.dtsi
>> b/arch/arm/boot/dts/bcm283x-common.dtsi
>> new file mode 100644
>> index 000000000000..3c8834bee390
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/bcm283x-common.dtsi
>> @@ -0,0 +1,11 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +
>> +/ {
>> + soc {
>> + rng@7e104000 {
>> + compatible = "brcm,bcm2835-rng";
>> + reg = <0x7e104000 0x10>;
>> + interrupts = <2 29>;
>> + };
>> + };
>> +};
>
> I think Stefan wrote bcm283x-common.dtsi by mistake, he really meant
> bcm2835-common.dtsi.
>

Thanks I was just wondering on which tree/patch-set this was based.

Regards,
Matthias

> See bcm2835-common.dtsi's header comment:
>
> /* This include file covers the common peripherals and configuration between
> * bcm2835, bcm2836 and bcm2837 implementations.
> */
>
> Regards,
> Nicolas
>
>
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