From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
To: Conor.Dooley@microchip.com
Cc: broonie@kernel.org, aou@eecs.berkeley.edu, robh+dt@kernel.org,
linus.walleij@linaro.org, bgolaszewski@baylibre.com,
palmer@dabbelt.com, paul.walmsley@sifive.com,
jassisinghbrar@gmail.com, atish.patra@wdc.com,
Daire.McNamara@microchip.com, Lewis.Hanly@microchip.com,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
geert@linux-m68k.org, linux-gpio@vger.kernel.org,
linux-riscv@lists.infradead.org, linux-crypto@vger.kernel.org,
linux-usb@vger.kernel.org, bin.meng@windriver.com,
linux-i2c@vger.kernel.org, alexandre.belloni@bootlin.com,
Ivan.Griffin@microchip.com, linux-rtc@vger.kernel.org,
linux-spi@vger.kernel.org, a.zummo@towertech.it,
gregkh@linuxfoundation.org
Subject: Re: [PATCH 06/13] dt-bindings: rng: add bindings for microchip mpfs rng
Date: Wed, 10 Nov 2021 08:43:20 +0100 [thread overview]
Message-ID: <a0713a10-3409-4401-e612-0a9c06f88ea1@canonical.com> (raw)
In-Reply-To: <ea871add-bddc-c4ae-ac9d-e86b4fad5a02@microchip.com>
On 09/11/2021 14:36, Conor.Dooley@microchip.com wrote:
> On 09/11/2021 12:56, Krzysztof Kozlowski wrote:
>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>
>> On 09/11/2021 13:54, Conor.Dooley@microchip.com wrote:
>>> On 08/11/2021 21:16, Krzysztof Kozlowski wrote:
>>>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>>>
>>>> On 08/11/2021 16:05, conor.dooley@microchip.com wrote:
>>>>> From: Conor Dooley <conor.dooley@microchip.com>
>>>>>
>>>>> Add device tree bindings for the hardware rng device accessed via
>>>>> the system services on the Microchip PolarFire SoC.
>>>>>
>>>>> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
>>>>> ---
>>>>> .../bindings/rng/microchip,mpfs-rng.yaml | 31 +++++++++++++++++++
>>>>> 1 file changed, 31 insertions(+)
>>>>> create mode 100644 Documentation/devicetree/bindings/rng/microchip,mpfs-rng.yaml
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/rng/microchip,mpfs-rng.yaml b/Documentation/devicetree/bindings/rng/microchip,mpfs-rng.yaml
>>>>> new file mode 100644
>>>>> index 000000000000..e8ecb3538a86
>>>>> --- /dev/null
>>>>> +++ b/Documentation/devicetree/bindings/rng/microchip,mpfs-rng.yaml
>>>>> @@ -0,0 +1,31 @@
>>>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>>>> +%YAML 1.2
>>>>> +---
>>>>> +$id: "http://devicetree.org/schemas/rng/microchip,mpfs-rng.yaml#"
>>>>> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
>>>>> +
>>>>> +title: Microchip MPFS random number generator
>>>>> +
>>>>> +maintainers:
>>>>> + - Conor Dooley <conor.dooley@microchip.com>
>>>>> +
>>>>> +properties:
>>>>> + compatible:
>>>>> + const: microchip,polarfire-soc-rng
>>>>> +
>>>>> + syscontroller:
>>>>> + maxItems: 1
>>>>> + description: name of the system controller device node
>>>>
>>>> There are several issues with this:
>>>> 1. You need to describe the type.
>>>> 2. Description is not helpful (just copying the name of property) and
>>>> actually misleading because you do not put there the name of device node.
>>>> 3. What is it? Looks like syscon (or sometimes called sysreg). If yes,
>>>> please use existing syscon bindings.
>>> 1 & 2 - Correct, it is bad & I'll write a better description for it.
>>> 3 - Its a system controller implemented as a mailbox. The syscontroller
>>> is the mailbox client, which the rng and generic drivers both use.
>>
>> I understood that pointed device node is a mailbox, not this node. But
>> here, what is it here? How do you use it here?
> The system controller is the means of access to the random number
> generator. The phandle to the sys controller is provided here so that
> the rng driver can locate the mailbox client through which it requests
> random numbers.
I am asking this to understand whether there is a generic or existing
property which should be used instead.
If I understand correctly, the rng driver needs a mailbox client? If it
is mailbox client, then there is a property: "mboxes". Use this one
(look for existing bindings, e.g.
Documentation/devicetree/bindings/firmware/arm,scmi.yaml).
Best regards,
Krzysztof
next prev parent reply other threads:[~2021-11-10 7:43 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-08 15:05 [PATCH 00/13]Update the icicle kit device tree conor.dooley
2021-11-08 15:05 ` [PATCH 01/13] dt-bindings: interrupt-controller: create a header for RISC-V interrupts conor.dooley
2021-11-23 11:07 ` Heiko Stübner
2021-11-23 11:35 ` Anup Patel
2021-11-29 19:57 ` Rob Herring
2021-11-08 15:05 ` [PATCH 02/13] dt-bindings: interrupt-controller: add defines for mpfs-plic conor.dooley
2021-11-23 11:17 ` Heiko Stübner
2021-11-29 19:56 ` Rob Herring
2021-11-30 8:15 ` Conor.Dooley
2021-11-08 15:05 ` [PATCH 03/13] dt-bindings: soc/microchip: update sys ctrlr compat string conor.dooley
2021-11-08 21:09 ` Krzysztof Kozlowski
2021-11-09 8:33 ` Geert Uytterhoeven
2021-11-09 15:20 ` Conor.Dooley
2021-11-29 20:03 ` Rob Herring
2021-11-30 8:35 ` Conor.Dooley
2021-11-08 15:05 ` [PATCH 04/13] dt-bindings: riscv: update microchip polarfire binds conor.dooley
2021-11-08 21:10 ` Krzysztof Kozlowski
2021-11-09 8:34 ` Geert Uytterhoeven
2021-11-09 12:08 ` Conor.Dooley
2021-11-09 13:04 ` Geert Uytterhoeven
2021-11-23 11:24 ` Heiko Stübner
2021-11-08 15:05 ` [PATCH 05/13] dt-bindings: i2c: add bindings for microchip mpfs i2c conor.dooley
2021-11-08 21:13 ` Krzysztof Kozlowski
2021-11-09 4:06 ` Rob Herring
2021-11-08 15:05 ` [PATCH 06/13] dt-bindings: rng: add bindings for microchip mpfs rng conor.dooley
2021-11-08 21:16 ` Krzysztof Kozlowski
2021-11-09 12:54 ` Conor.Dooley
2021-11-09 12:56 ` Krzysztof Kozlowski
2021-11-09 13:36 ` Conor.Dooley
2021-11-10 7:43 ` Krzysztof Kozlowski [this message]
2021-11-10 9:46 ` Conor.Dooley
2021-11-29 20:08 ` Rob Herring
2021-11-09 8:37 ` Geert Uytterhoeven
2021-11-09 11:55 ` Conor.Dooley
2021-11-08 15:05 ` [PATCH 07/13] dt-bindings: rtc: add bindings for microchip mpfs rtc conor.dooley
2021-11-08 21:20 ` Krzysztof Kozlowski
2021-11-09 4:06 ` Rob Herring
2021-11-09 8:39 ` Geert Uytterhoeven
2021-11-08 15:05 ` [PATCH 08/13] dt-bindings: soc/microchip: add bindings for mpfs system services conor.dooley
2021-11-08 21:20 ` Krzysztof Kozlowski
2021-11-08 15:05 ` [PATCH 09/13] dt-bindings: gpio: add bindings for microchip mpfs gpio conor.dooley
2021-11-08 21:22 ` Krzysztof Kozlowski
2021-11-09 4:06 ` Rob Herring
2021-11-09 8:43 ` Geert Uytterhoeven
2021-11-08 15:05 ` [PATCH 10/13] dt-bindings: spi: add bindings for microchip mpfs spi conor.dooley
2021-11-08 21:24 ` Krzysztof Kozlowski
2021-11-09 4:06 ` Rob Herring
2021-11-09 12:16 ` Conor.Dooley
2021-11-09 12:53 ` Krzysztof Kozlowski
2021-11-09 12:58 ` Conor.Dooley
2021-11-09 13:04 ` Krzysztof Kozlowski
2021-11-09 13:20 ` Conor.Dooley
2021-11-10 7:45 ` Krzysztof Kozlowski
2021-11-09 8:45 ` Geert Uytterhoeven
2021-11-09 10:56 ` Conor.Dooley
2021-11-08 15:05 ` [PATCH 11/13] dt-bindings: usb: add bindings for microchip mpfs musb conor.dooley
2021-11-08 21:27 ` Krzysztof Kozlowski
2021-11-09 4:06 ` Rob Herring
2021-11-09 8:48 ` Geert Uytterhoeven
2021-11-08 15:05 ` [PATCH 12/13] riscv: icicle-kit: update microchip icicle kit device tree conor.dooley
2021-11-08 21:40 ` Krzysztof Kozlowski
2021-11-10 12:07 ` Conor.Dooley
2021-11-09 9:04 ` Geert Uytterhoeven
2021-11-10 14:19 ` Conor.Dooley
2021-11-10 14:58 ` Geert Uytterhoeven
2021-11-10 15:07 ` Conor.Dooley
2021-11-15 15:39 ` Conor.Dooley
2021-11-15 16:17 ` Geert Uytterhoeven
2021-11-17 12:17 ` Daire.McNamara
2021-11-08 15:05 ` [PATCH 13/13] MAINTAINERS: update riscv/microchip entry conor.dooley
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