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 0AE0179F2; Sun, 22 Jun 2025 09:49:49 +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=1750585790; cv=none; b=pLPc2/nHb7bydY5aGWM2wYgv6gtWki6lZNN+bnGyjO8/C8Rrx0sXClk/wZb0QOY9C3RRY/i6cXwRPgKf9clbfvVkOHAyJFztpBlmpt8OsZwZp/shF2ihofX6alSKjBl99rCPbsF4wskpo/hG0oea59DRRotRGLmYclMUdPp+bgw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750585790; c=relaxed/simple; bh=iwltcif6vICScgREcP+h+g1nFFViLlwsSAlyON+V8C0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=IsjXYnqGCDqSCI7gSiUL0Gu6BdkpNFZs8GK7Z8oFCF1VxQeIEvNjRgJ+vASdrLHQGtj7JIXzC6DFAUCQrayJntKiPY415GbLjuEMzld1F1rLmleANzBHJ6U7ZFdF0tMXJTQtJJA/wbOyG6ipoBYy7tRBq1ae2Rbd0DUOZmyho8k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZC5htukG; 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="ZC5htukG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F19FC4CEE3; Sun, 22 Jun 2025 09:49:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750585789; bh=iwltcif6vICScgREcP+h+g1nFFViLlwsSAlyON+V8C0=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ZC5htukG+JujMTd/Oouril8iRlgg7NBrGcD84+g6QR7kh87GrsZG6LMmgoiCQzJPX ir60lA5pI4pl3uTWjDJOOayp9QmgA2amNdlzrnFh3fxJfiSpU4wFMIT8a14VfSLXlI NI3l6OSgGBze94S1jfT15CddeajuXfda+WpelDz01XCFsFAp72KaZgjR8Zno2ZE4cX Vpb7TnUQNM47F0RymTq9zdSN0FdoNCF7jRAi1giLW4Qy1xfFK9gQf9YzDPkJg42j5+ 2cngnJtoqq8fyCaIbsSob8f0Sxjt0uHRWfAtuwV8GeOJ5ZbKmUuurhHNxgHE6iPGn4 sy8siG8TeeWpQ== Message-ID: <5163d9d8-d106-47f3-a0f9-0eaa01f15498@kernel.org> Date: Sun, 22 Jun 2025 11:49:44 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 4/6] arm64: dts: axiado: Add initial support for AX3000 SoC and eval board To: Harshit Shah , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Bartosz Golaszewski , Arnd Bergmann , Catalin Marinas , Will Deacon Cc: "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-gpio@vger.kernel.org" , "soc@lists.linux.dev" References: <20250615-axiado-ax3000-soc-and-evaluation-board-support-v2-0-341502d38618@axiado.com> <20250615-axiado-ax3000-soc-and-evaluation-board-support-v2-4-341502d38618@axiado.com> <6ef92d1a-39cc-409f-8ebe-d28ad2006988@kernel.org> <9012cc61-b499-4213-9753-54cf4d24c822@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 On 20/06/2025 23:18, Harshit Shah wrote: > On 6/19/2025 11:08 PM, Krzysztof Kozlowski wrote: >>>>> + >>>>> + spi_clk: spi_clk { >>>>> + compatible = "fixed-clock"; >>>>> + #clock-cells = <0>; >>>>> + clock-frequency = <25000000>; >>>>> + }; >>>>> + >>>>> + apb_pclk: apb_pclk { >>>> No underscores in node names, but all these look incorrect - don't you >>>> have clock controller? >>> Noted, we will remove the "_" from the nodes. We do have clock >>> controller however that is being accessed by other CPU before Linux will >>> come-up. >> What does it mean? Is the clock controller not available at all for >> Linux or any other OS? > > Apologies for the confusion. Yes, clock controller is available however > it is only accessible by another CPU which boots up before Linux comes up. > > This another CPU is setting up the various output clocks (& PLLs) before > the Linux comes up. > > So, that's the reason haven not added the clock controller in this DTS > but only will add fixed clocks. And what happens if that other part decides to change frequencies? Best regards, Krzysztof