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 CD81B15359A; Thu, 2 May 2024 14:53:44 +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=1714661624; cv=none; b=BFhU6BwaRWdBDWOkFybM6tlAlYQs7nk0hp5HbCreX9KEKy8V69nI8SEK/2XtEBd8wR4jMZIAci/iKL0ruOBtmE1pkdMI0ln5SCJ09cm67c86vJ+UVThd8Th7wigwvErAKokJ4S01axm4f+bXr/X6zWUqCpRhm+sx6MgIks3pEPQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714661624; c=relaxed/simple; bh=rJbbTuAZzjxMG+bRiSasrkimovfkjL8WGmjN73xspck=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=qQQl7ZRhOzj9nTFgAqB1tJL+Y30joHLp9IKIXhy1rm9LzE0eyt+ZBVp7Zbv3xtI/1GTrVFynaqXOKKCb8vvx3jidMM9sw8GaceA8o4dgLD2JDwxD4nBg6rp5zFi2+v2MBF/q2cRGBu4VBVdnsiH3XvPVE5fZ5q+wD6mH9b0nrMc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LUopLDHJ; 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="LUopLDHJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F167C113CC; Thu, 2 May 2024 14:53:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714661624; bh=rJbbTuAZzjxMG+bRiSasrkimovfkjL8WGmjN73xspck=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=LUopLDHJi+VYHbdfaSLa1+8Sp9pPtyhbTbWLUSBVYhaQ89TNFZx2BcpROzbwBJxdN hJQiTDyOaqeSorCOUo1GYkrGipDQfyaNtcnNHJKRbOS1rcagJ1DtpENWjXBvGn+zmY bpE6AZyicxf80K+pYCGUW5kI3qTzc+K2CNcWpcuOOsU6jcUPeMRb0gjkquCskQP+t0 Do6M/4RPsA71UH/J2Ii/GVqxZHzXpn9c5JGwO+vt3XZuLzHRBUz1On/OJNICjSCoJ1 acsOJpbgWsc5LcJgv3dMndwzjosI4MsUhPp1NJM5sBOahj8ctRO7t4VMhaIIhcz9Sp uNAVzo6RJu+Hw== Message-ID: <10671947-f418-4520-a29f-4ce129770e65@kernel.org> Date: Thu, 2 May 2024 16:53:40 +0200 Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/3] spi: dt-bindings: Add num-cs property for mpfs-spi To: Prajna Rajendra Kumar , Mark Brown Cc: Rob Herring , Krzysztof Kozlowski , linux-riscv@lists.infradead.org, linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Conor Dooley , Daire McNamara , valentina.fernandezalanis@microchip.com References: <20240502143410.12629-1-prajna.rajendrakumar@microchip.com> <20240502143410.12629-3-prajna.rajendrakumar@microchip.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 02/05/2024 16:34, Prajna Rajendra Kumar wrote: > The PolarFire SoC SPI controller supports multiple chip selects,but in > the MSS, only one CS line is physically wired. To reflect this hardware > limitation in the device tree, the binding enforces that the 'num-cs' > property defaults to 1 and cannot exceed 1 unless additional > chip select lines are explicitly defined using GPIO descriptors. > You marked it as Fix for bug, but I don't understand where the bug is. Do you describe above the issue or the solution? > + - if: > + properties: > + compatible: > + contains: > + const: microchip,mpfs-spi > + not: > + required: > + - cs-gpios I don't understand what you are expressing here. Did you actually validate it that it achieves exactly what you want? > + then: > + properties: > + num-cs: > + default: 1 > + maximum: 1 > + > unevaluatedProperties: false > > examples: Best regards, Krzysztof