From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f53.google.com (mail-oa1-f53.google.com [209.85.160.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 97BB514EC56 for ; Wed, 19 Jun 2024 17:24:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.53 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718817873; cv=none; b=Xj4Svf8uQmIeE46O2peKpACr5m+N0480lCeTqSw7gQAJr/wakObvo9VnlPQKevW/zC2EIUI+w3sAoGSdLq41i02C4dNR1XBgCUnXPtJ4mRZApIqlUCxcIZqTj7kPcq5rYP+KjTj7iMn4vSiV6uM6Vlzi5yt2HWPUKLmHVevjHFA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718817873; c=relaxed/simple; bh=pHGHrMlLeKjI1/up7Rrmj+CZx30fzhzHLvJvS34Vm1M=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ZoDbXnD+Fj4uKpiwyim1zU/3gusve84Dz08jtQ3HpEdpV0mYFIwaUQFwOQuzMRVGFZXZUExdJX8+a7TjkyEELfsfUdZvUiBFJY/ZdDzByEWXk984RGLmUgup/uqJTag8CWOa6kGlsSsoLc+c5Zv3JzetsxhbhWWGtxw0I4SCG9Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com; spf=pass smtp.mailfrom=baylibre.com; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b=Dor1pG4Q; arc=none smtp.client-ip=209.85.160.53 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baylibre.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b="Dor1pG4Q" Received: by mail-oa1-f53.google.com with SMTP id 586e51a60fabf-25c9af0102cso51136fac.0 for ; Wed, 19 Jun 2024 10:24:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20230601.gappssmtp.com; s=20230601; t=1718817870; x=1719422670; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=WW/sGpONNf0gL3cR4b4skPpNC8NQNbXJ/sZFcTqP6DY=; b=Dor1pG4Qu+/1feuIJb5xH9E1dRiL/pF4P/tuzZCw02844zQYFW4t6pejHri09PnSsg ZYh6A4QbVIO9g16Dt4sVW3/owtrYOfO8G9q0gaKu3Q0hcuFATbB+mL/k/bhbU+0xhKWk gYpkAhSQ5dJfyhQgHPtmFafJkfXDOVqXGS1GOnY/n/5EQjW7PYxnGZ9AqZJs1R7XRcx2 PM+1Ja2iZ5eE0HrUe+8K3T6/qCMggorIBLkI6wrsbuBfpzKjq0MxLd65PULuFYa2UDVm vrpqYZKVg21F38RWVaJjqqmU7xWJxbahWaFamP6Q6XtJoScqsoV2i8dnwZ75SgrYupD/ gdsA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718817870; x=1719422670; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=WW/sGpONNf0gL3cR4b4skPpNC8NQNbXJ/sZFcTqP6DY=; b=TAbE5vEjYgPCd2DwQYhuJgWOq7wI0x7WZNN5a+B40zuKnrfILB0B0h91m4enoIVYSb Y1dwuiWEYVDnjYqPxCXcjviaOGa3h2USg9OeEuaIomegit/ivIlwaKmfuklX6ucv+LbD iWVIcZGs0BB9J8rKY1FdaDkVMPQBLxfVCLywGdy1pMTwLdIjlUJOpSw/FaATqDxI4wW8 NompdzVswamU2V/fP+2EGJfUJze7Duog1jwIhthWYC0LrV2+U/gPwZEVbz9hHd0qLDmu 3qh0GPmu+Z0NCxRc/o9nqq0XGeCQO3rW52QP7VDhEYJ6Hp+IGFjR4QZxzy2EJcAOjju0 UCLg== X-Forwarded-Encrypted: i=1; AJvYcCVo00Zbjm+9C5J0yNAd7rE465O9f8k7d9+fT7xbPIsG8MDon1GsdSs8zFlZPHv5poga2qBuCFWTeSXneLhJig0H2zviZdhrTa2gug== X-Gm-Message-State: AOJu0YwP6N0esWsvtQEdu65JQsX4/9GxuQhO6426DbkpSZuy1UuJ4SB+ Yba9mkPyMy+k7mg7Au0ALhk0oDnNqmNNAM7um7Sr7uQPAyoKpTNJ5JCTdn/fBOg= X-Google-Smtp-Source: AGHT+IHR54HXcr7/yjcrsiJmtUghksi74ROiI+fCbYFFhArdAwoof+CXH2w8urjUZ7OSSXvEzQS16w== X-Received: by 2002:a05:6870:1716:b0:258:44b7:b842 with SMTP id 586e51a60fabf-25c94991633mr3524648fac.13.1718817870065; Wed, 19 Jun 2024 10:24:30 -0700 (PDT) Received: from [192.168.0.142] (ip98-183-112-25.ok.ok.cox.net. [98.183.112.25]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-2567a94e375sm3804185fac.4.2024.06.19.10.24.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 19 Jun 2024 10:24:29 -0700 (PDT) Message-ID: Date: Wed, 19 Jun 2024 12:24:28 -0500 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 v4 1/6] spi: Enable controllers to extend the SPI protocol with MOSI idle configuration To: Marcelo Schmitt , broonie@kernel.org, lars@metafoo.de, Michael.Hennerich@analog.com, jic23@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, nuno.sa@analog.com, marcelo.schmitt1@gmail.com Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org References: <36eefb860f660e2cadb13b00aca04b5a65498993.1718749981.git.marcelo.schmitt@analog.com> Content-Language: en-US From: David Lechner In-Reply-To: <36eefb860f660e2cadb13b00aca04b5a65498993.1718749981.git.marcelo.schmitt@analog.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 6/18/24 6:10 PM, Marcelo Schmitt wrote: ... > @@ -3928,7 +3934,8 @@ int spi_setup(struct spi_device *spi) > * so it is ignored here. > */ > bad_bits = spi->mode & ~(spi->controller->mode_bits | SPI_CS_WORD | > - SPI_NO_TX | SPI_NO_RX); > + SPI_NO_TX | SPI_NO_RX | SPI_MOSI_IDLE_LOW | > + SPI_MOSI_IDLE_HIGH); This looks wrong to me. Adding flags here causes them to be ignored rather than to be checked. I also did a runtime check with a random driver and a SPI controller that does not have the flag. spi->mode |= SPI_MOSI_IDLE_LOW; ret = spi_setup(spi); if (ret) return ret; It incorrectly passes when used with this change but correctly fails without this change. > ugly_bits = bad_bits & > (SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTAL | > SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL);