From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2CDDBE77187 for ; Wed, 18 Dec 2024 09:23:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=23jRwZFARyquCxtW7ly3sjynKDV3/raUeCnhohv8HGI=; b=bbHb58kLlYEvbiGm3u9ffmX2oY LMZbiqIefQusjJz/sobKq1IL2f+Rz9fDBLUP6IfMuUKcRO3wFRSj3Ie7MAE9t7897d4XnHup/k3xs wycTlou6p9MCA/heDRNEEBzY/YQX7rsgVm+ftQ/cEWWRN+JPYFhgOoeiGgPZKQ93NBScZl3Q8XuTp 3ShpAnDCPnrJKeg6Iu1vXSodnwkgjW416ocYlrrlKAEevOvysr659yJ3jniomnT8yqTXlGVQVsEYv hJonLgVR3bbhaK8z2xvjfVfhBBGuy6PA6LIR4QbCNQhjO1ZFLsb5ZcMDAmZqJtNp1B7tPK5i7+qPc UbTiRkRQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tNqHH-0000000G4Pu-30xP; Wed, 18 Dec 2024 09:23:35 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tNqGB-0000000G41N-35kw for linux-arm-kernel@lists.infradead.org; Wed, 18 Dec 2024 09:22:28 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 293D25C38CC; Wed, 18 Dec 2024 09:21:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 47A48C4CECE; Wed, 18 Dec 2024 09:22:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734513746; bh=bG/W66dEi/LFJfO8SPmj2MLLiUu+QmDsy4zds5+lgr4=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=F8+dU9opxtu9EWSBN6gpRvf3iDnEOKI0E2uH3R1IrKUHewRcKvPTF4cy7bv9vUtVH WwRDSIgjhYPffP48cvBd7SklG5n2Px2TzENThGJd0dYg4eByUkVbsr7nBss/ntVusM 33mHAcHNUxmpseLlIvRQYD7SKve/YLfCQ0QlfQmEaqCktBttddmXHND6EVX07NJ6WG 5IBz01ldNXNeQ3f3PduLnO6NoTT6Yvi3+R2suRLREFxS6sr52/a2yaKg+ub+anUPF1 iGz/N358Tbz+VpmMs+p5XmuXP2LqnPSKfGPjrEIaViNZ22BOyJDcOgWISFH+MZ580X 7PIxF0vhPFKsA== Message-ID: <3fb8ba3f-3016-4823-bf48-130f173c8f66@kernel.org> Date: Wed, 18 Dec 2024 10:22:21 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 1/2] dt-bindings: i2c: exynos5: Add samsung,exynos8895-hsi2c compatible To: Ivaylo Ivanov , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alim Akhtar Cc: linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org References: <20241214220419.723100-1-ivo.ivanov.ivanov1@gmail.com> <20241214220419.723100-2-ivo.ivanov.ivanov1@gmail.com> <0ebc12ed-fe91-4c8a-a626-b735b0eeecf1@kernel.org> <007559c5-f566-4625-99b7-e761a916fba3@gmail.com> <6e93d59d-71e5-4c09-862f-55b5504121aa@gmail.com> <69fd1dbc-a29f-488c-a30f-7e5ea8f01a23@kernel.org> <17fbfcdd-8b79-4907-a4c8-798da0ef0526@gmail.com> <56c5788a-2d49-4abb-af4b-65a11bdc4094@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241218_012227_866272_7772D10E X-CRM114-Status: GOOD ( 13.56 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 17/12/2024 11:04, Ivaylo Ivanov wrote: > On 12/17/24 11:43, Krzysztof Kozlowski wrote: >> On 17/12/2024 10:31, Ivaylo Ivanov wrote: >>> On 12/17/24 11:26, Krzysztof Kozlowski wrote: >>>> On 17/12/2024 10:08, Ivaylo Ivanov wrote: >>>>>>>>> - items: >>>>>>>>> - enum: >>>>>>>>> @@ -94,9 +95,28 @@ allOf: >>>>>>>>> - clock-names >>>>>>>>> >>>>>>>>> else: >>>>>>>>> - properties: >>>>>>>>> - clocks: >>>>>>>>> - maxItems: 1 >>>>>>>>> + if: >>>>>>>>> + properties: >>>>>>>>> + compatible: >>>>>>>>> + contains: >>>>>>>>> + enum: >>>>>>>>> + - samsung,exynos8895-hsi2c >>>>>>>>> + >>>>>>>>> + then: >>>>>>>>> + properties: >>>>>>>>> + clocks: >>>>>>>> Missing minItems >>>>>>>> >>>>>>>>> + maxItems: 2 >>>>>>>>> + >>>>>>>>> + clock-names: >>>>>>>> Ditto >>>>>>>> >>>>>>>>> + maxItems: 2 >>>>>>>>> + >>>>>>>>> + required: >>>>>>>>> + - clock-names >>>>>>>> I don't understand why do you need second, same branch in if, basically >>>>>>> Because, as I stated in the commit message, we have HSI2C controllers >>>>>>> both implemented in USIv1 blocks and outside. These that are a part of >>>>>> On Exynos8895? Where? With the same compatible? >>>>> hsi2c_0 which has a clock from BUSC and hsi2c_1 to hsi2c_4 which use clocks >>>>> from PERIC1 (CLK_GOUT_PERIC1_HSI2C_CAM{0,1,2,3}_IPCLK). Why would >>>>> they need a different compatible though? It's functionally the same i2c design >>>>> as the one implemented in USIv1 blocks. >>>> If one block is part of USI and other not, they might not be the same >>>> I2C blocks, even if interface is similar. If they were the same or even >>>> functionally the same, they would have the same clock inputs. However >>> I see, so in such case I should make samsung,exynos8895-hsi2c-nonusi or >>> something like that? >>> >>>> user manual also suggests that there is only one clock, not two (for >>>> both cases), so they could be functionally equivalent but then number of >>>> clocks looks incorrect. >>> That'd be weird. Both according to downstream and upstream clk driver, >>> for the USI-implemented i2cs we have a pclk and an sclk_usi. >> Something is not precise here, as usually with Samsung clock topology. >> >> First, the non-USI instances have the IPCLK as well, e.g. things like >> PERIC1_UID_HSI2C_CAM1_IPCLKPORT_iPCLK >> >> USI have BLK_PERIC0_UID_USI03_IPCLKPORT_i_SCLK_USI, but that's USI >> clock, not HSI2C in USI. Datasheet mentions this is UART and SPI special >> clock, but not I2C. > > That's weird. Don't we need the clock enabled in order for the > USIv1's HSI2C to work? The clock goes to USI, so it is enabled, no? Best regards, Krzysztof