From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3B36B4A0F; Wed, 19 Mar 2025 07:46:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742370405; cv=none; b=T7/DCWbqHGYKnZLOYtUrCj3B+3tb41cede/8t0OUIi+vnaY1FJu5scANU+EkghGoi++9KBd5bhqAQ3Jw7fsyvBts5YeErIDrJw/ObIn8bEncFms5hJFT7dh6d9zgs8sXgfPngQYXtYa/lMfRFfkV0eHmoguU6VGS8n9bIYTugRw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742370405; c=relaxed/simple; bh=R/+mKgYJYtnUQdwRx76WkNRfBcHpmYchsod3jVqFMbA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=NozGJLxUE7Lwrtdax+wk5byuWCv80rkoy2rRVRg3xCdQT+Qrax2IUR59jwpJFMTq03SuGsLdO67SVsEN6rFrOQmzVcQUdsY7uGTDDOOBOta77OPXlo9sFCdbZtXy5zTC8lK8kgC2V7Kl7J1lWzaoYi8DCs7AkYaA1z+IM/iEXvo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FlKi5P/I; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FlKi5P/I" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 614FCC4CEE9; Wed, 19 Mar 2025 07:46:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1742370403; bh=R/+mKgYJYtnUQdwRx76WkNRfBcHpmYchsod3jVqFMbA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=FlKi5P/I/oiAqvN4MxYZtAVlEdyAcFhVuiF4iI1I702vBGhW5zonhSlT4QbrgVxkW tpGjayw/seegFnXDZzBvWcrmSS93zBjzAahw7t0KSRYEhOvGSj2O1OqjgCMbbTzx7l Px4QDBspQ5K9K0oME5sJMs26mmVGvPDC6q8wKGYbkzL9fjh27erTym1fjZ3JRvRG3e 0DVcQUIN0/GzctujuJJ3970Zt+1nE1qtB0S2/340rp9VmAOoTfWlbI7qDl01RiV0RE MLGhaSEOgKHjmF2rJSAESWsaAej932mLYtltX5s8kJ+aDKtLGQCqd93KICNE77JsOE b0OqTwZP9EpjQ== Message-ID: <1da4e402-62f3-4bad-9129-1f5a08148987@kernel.org> Date: Wed, 19 Mar 2025 08:46:36 +0100 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] dt-bindings: misc: bist: Add BIST dt-binding for TI K3 devices To: Neha Malcom Francis Cc: nm@ti.com, vigneshr@ti.com, kristo@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, u-kumar1@ti.com References: <20241128140825.263216-1-n-francis@ti.com> <20241128140825.263216-2-n-francis@ti.com> <837d329b-bcdd-4c3b-b508-e916b110ce25@ti.com> <8e58b093-1c64-45b9-a9d3-9835a3bbc4fd@ti.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 13/03/2025 12:14, Neha Malcom Francis wrote: > Hi Krzysztof > > On 29/11/24 14:45, Krzysztof Kozlowski wrote: >> On 29/11/2024 08:43, Neha Malcom Francis wrote: >>>>> + >>>>> + power-domains: >>>>> + maxItems: 1 >>>>> + >>>>> + ti,bist-instance: >>>>> + $ref: /schemas/types.yaml#/definitions/uint32 >>>>> + description: >>>>> + the BIST instance in the SoC represented as an integer >>>> >>>> No instance indices are allowed. Drop. >>>> >>> >>> Question on this, this is not a property that is driven by software but rather >>> indicates which register sequences have to be picked up for triggering this test >>> from this instance. So I don't see how I can workaround this without getting >>> this number. Or maybe call it ID rather than instance? >> >> I don't understand how the device operates, so what is exactly behind >> some sequences of registers for triggering this test. You described >> property as index or ID of one instance of the block. That's not what we >> want in the binding. That's said maybe other, different hardware >> characteristic is behind, who knows. Or maybe it's about callers... or >> maybe that's not hardware property at all, but runtime OS, who knows. >> > > Sorry for such a late reply, but I was hoping to get more details on > this "ID" and never got back to the thread... > > The best way I can describe is this device (BIST) runs a safety > diagnostic test on a bunch of processors/blocks (let's call them > targets). There's a mapping between the instance of this device and the > targets it will run the test. This ID was essentially letting the BIST > driver know which are these targets. So you want to configure some target? Then this is your property. If you want to configure 'foo' difference in DT, you do not write 'bar'... Anyway, no clue, original emails are long time not in my inbox. Context disappeared also long time ago. Best regards, Krzysztof