linux-hardening - Re: [PATCH 05/25] dt-bindings: rtc: Add RDA Micro RDA8810PL RTC

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Message-ID: <c905fb3ace281280f1ac11c7fbe8e0aa@mainlining.org>
Date: Thu, 18 Sep 2025 11:11:10 +0700
From: Dang Huynh <dang.huynh@...nlining.org>
To: Conor Dooley <conor@...nel.org>
Cc: Manivannan Sadhasivam <mani@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Linus Walleij <linus.walleij@...aro.org>, Bartosz
 Golaszewski <brgl@...ev.pl>, Alexandre Belloni
 <alexandre.belloni@...tlin.com>, Michael Turquette
 <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, Philipp Zabel
 <p.zabel@...gutronix.de>, Sebastian Reichel <sre@...nel.org>, Vinod Koul
 <vkoul@...nel.org>, Kees Cook <kees@...nel.org>, "Gustavo A. R. Silva"
 <gustavoars@...nel.org>, Ulf Hansson <ulf.hansson@...aro.org>,
 linux-arm-kernel@...ts.infradead.org, linux-unisoc@...ts.infradead.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-gpio@...r.kernel.org, linux-rtc@...r.kernel.org,
 linux-clk@...r.kernel.org, linux-pm@...r.kernel.org,
 dmaengine@...r.kernel.org, linux-hardening@...r.kernel.org,
 linux-mmc@...r.kernel.org
Subject: Re: [PATCH 05/25] dt-bindings: rtc: Add RDA Micro RDA8810PL RTC

On 2025-09-18 03:46, Conor Dooley wrote:
> On Wed, Sep 17, 2025 at 03:07:22AM +0700, Dang Huynh wrote:
>> Add documentation describing the RTC found in RDA8810PL SoC.
>> 
>> Signed-off-by: Dang Huynh <dang.huynh@...nlining.org>
>> ---
>>  .../devicetree/bindings/rtc/rda,8810pl-rtc.yaml    | 30 
>> ++++++++++++++++++++++
>>  1 file changed, 30 insertions(+)
>> 
>> diff --git a/Documentation/devicetree/bindings/rtc/rda,8810pl-rtc.yaml 
>> b/Documentation/devicetree/bindings/rtc/rda,8810pl-rtc.yaml
>> new file mode 100644
>> index 
>> 0000000000000000000000000000000000000000..3ceae294921cc3211cd775d9b3890393196faf82
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/rtc/rda,8810pl-rtc.yaml
>> @@ -0,0 +1,30 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/rtc/rda,8810pl-rtc.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: RDA Micro RDA8810PL Real Time Clock
>> +
>> +maintainers:
>> +  - Dang Huynh <dang.huynh@...nlining.org>
>> +
>> +properties:
>> +  compatible:
>> +    const: rda,8810pl-rtc
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +required:
>> +  - compatible
>> +  - reg
> 
> Your driver implements functions that turn on an alarm irq, but there 
> is
> none mentioned here. What's going on there?
The RTC doesn't seem to have an AP IRQ associated. I can't find any
reference to it on downstream kernel and the docs.

> 
> Additionally, there's no clocks property? For an onboard RTC I'd have
> expected there to be a clock sourced outside of the block.
> 
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    rtc@...6000 {
>> +      compatible = "rda,8810pl-rtc";
>> +      reg = <0x1a06000 0x1000>;
>> +    };
>> 
>> --
>> 2.51.0