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From: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
To: Krishna Reddy <vdumpa-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
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	<will-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Thierry Reding <treding-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	Jonathan Hunter
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	<linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Yu-Huan Hsu <YHsu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	Sachin Nikam <Snikam-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	Pritesh Raithatha
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	Timo Alho <talho-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	Bitan Biswas <bbiswas-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	Mikko Perttunen
	<mperttunen-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	Nicolin Chen <nicolinc-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	Bryan Huntsman <bhuntsman>
Subject: Re: [PATCH v10 4/5] dt-bindings: arm-smmu: add binding for Tegra194 SMMU
Date: Mon, 13 Jul 2020 15:10:25 +0100	[thread overview]
Message-ID: <c2ab2a0d-419d-555f-c124-2cfa1ecb2a81@arm.com> (raw)
In-Reply-To: <BYAPR12MB2822514F93F831507A811EE9B3650-ZGDeBxoHBPlXmIuPQoPGkAdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>

On 2020-07-10 21:29, Krishna Reddy wrote:
> Thanks Rob. One question on setting "minItems: ". Please see below.
> 
>>> +allOf:
>>> +  - if:
>>> +      properties:
>>> +        compatible:
>>> +          contains:
>>> +            enum:
>>> +              - nvidia,tegra194-smmu
>>> +    then:
>>> +      properties:
>>> +        reg:
>>> +          minItems: 2
>>> +          maxItems: 2
> 
>> This doesn't work. The main part of the schema already said there's only
>> 1 reg region. This part is ANDed with that, not an override. You need to add an else clause with 'maxItems: 1' and change the base schema to
>> {minItems: 1, maxItems: 2}.
> 
> As the earlier version of base schema doesn't have "minItems: " set, should it be set to 0 for backward compatibility?  Or can it just be omitted setting in base schema as before?

We've always needed at least 1 "reg" specifier in practice, so I don't 
think being backwards-compatible with broken DTs is a concern :)

Robin.

> 
> "else" part to set "maxItems: 1" and setting "maxItems: 2" in base schema is clear to me.
> 
> 
> -KR
> 

  parent reply	other threads:[~2020-07-13 14:10 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-08  5:00 [PATCH v10 0/5] NVIDIA ARM SMMU Implementation Krishna Reddy
2020-07-08  5:00 ` [PATCH v10 1/5] iommu/arm-smmu: move TLB timeout and spin count macros Krishna Reddy
     [not found]   ` <20200708050017.31563-2-vdumpa-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2020-07-08 12:05     ` Jon Hunter
2020-07-08 20:37     ` Nicolin Chen
     [not found] ` <20200708050017.31563-1-vdumpa-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2020-07-08  5:00   ` [PATCH v10 2/5] iommu/arm-smmu: ioremap smmu mmio region before implementation init Krishna Reddy
     [not found]     ` <20200708050017.31563-3-vdumpa-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2020-07-08 12:05       ` Jon Hunter
2020-07-08 20:37       ` Nicolin Chen
2020-07-13 14:02       ` Robin Murphy
2020-07-08  5:00   ` [PATCH v10 3/5] iommu/arm-smmu: add NVIDIA implementation for ARM MMU-500 usage Krishna Reddy
     [not found]     ` <20200708050017.31563-4-vdumpa-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2020-07-08 12:24       ` Jon Hunter
2020-07-08 20:36       ` Nicolin Chen
2020-07-08  5:00   ` [PATCH v10 4/5] dt-bindings: arm-smmu: add binding for Tegra194 SMMU Krishna Reddy
     [not found]     ` <20200708050017.31563-5-vdumpa-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2020-07-08 12:25       ` Jon Hunter
2020-07-09 20:13       ` Rob Herring
2020-07-10 20:29         ` Krishna Reddy
     [not found]           ` <BYAPR12MB2822514F93F831507A811EE9B3650-ZGDeBxoHBPlXmIuPQoPGkAdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2020-07-13 14:10             ` Robin Murphy [this message]
     [not found]               ` <c2ab2a0d-419d-555f-c124-2cfa1ecb2a81-5wv7dgnIgG8@public.gmane.org>
2020-07-14 14:22                 ` Rob Herring
2020-07-08  5:00   ` [PATCH v10 5/5] iommu/arm-smmu: Add global/context fault implementation hooks Krishna Reddy
     [not found]     ` <20200708050017.31563-6-vdumpa-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2020-07-08 12:28       ` Jon Hunter
2020-07-08 20:36       ` Nicolin Chen
2020-07-13 13:44       ` Will Deacon
2020-07-17 11:58         ` Robin Murphy
2020-07-13 13:50   ` [PATCH v10 0/5] NVIDIA ARM SMMU Implementation Will Deacon
2020-07-17 10:03     ` Will Deacon
2020-07-17 22:36       ` Krishna Reddy

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