From patchwork Tue Mar 26 14:11:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Charles Keepax X-Patchwork-Id: 783044 Received: from mx0b-001ae601.pphosted.com (mx0b-001ae601.pphosted.com [67.231.152.168]) (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 E97377F7C8; Tue, 26 Mar 2024 14:11:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.152.168 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711462290; cv=none; b=K2xP1EFKwMWNZQGPYVnENoQrB5G6Afj2sq1G+rXUtmGGVy5eYsLLVwgOHNYl9YHkMgxA1VOWJaRCicIIv9bF1FEQx1DGSDiRUKQY0jmnssrpd9i+xVjbcR6NHIBjLJDxMgyaAeWX6sITneG9+nCi4R5BM/n0c/dyOL+RwX69mi8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711462290; c=relaxed/simple; bh=RT6HSUWziNjh0DyUN+VyxLpq9Q8jhGRYp/rHRkgQb4g=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=ESPaU9gwVlfwd2hUKGs14iobzHSb55d/UVEcWnbyHg99tDYTJtgiJnk3fZCU7XkmSU2W7ahX6nCkJFMtvljRoM/ZVATr8Y1i7UN4YpkUotyx0uQc4kM8XSwSizQQc8vBWfvDxrZovA7/Nwme3cJq1JZ1hdps9tQDLPfNzljObMM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=opensource.cirrus.com; spf=pass smtp.mailfrom=opensource.cirrus.com; dkim=pass (2048-bit key) header.d=cirrus.com header.i=@cirrus.com header.b=ZHxseVw9; arc=none smtp.client-ip=67.231.152.168 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=opensource.cirrus.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=opensource.cirrus.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=cirrus.com header.i=@cirrus.com header.b="ZHxseVw9" Received: from pps.filterd (m0077474.ppops.net [127.0.0.1]) by mx0b-001ae601.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 42Q79uU8026416; Tue, 26 Mar 2024 09:11:10 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h= from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding:content-type; s=PODMain02222019; bh=4 NtiBv4Lh/zR4jqlmzESI/1KvypLtdYOe+J93npl964=; b=ZHxseVw9iwpqvPEx7 dbzAXDyUBKPbLNMZFLfpPP8VxdP2cySxFU7tFUgaWIzEEIf6fzaY+qP+8/HronjK SeXTu1A7X6fWN6pJcnfPrE+G0167IkB1eULpMAI+ZyG4aiufMyx0gmwHURk7Sfjj BvZYYVQMq4hcxpobZEy05IaQvw83fyVEaUopxawuMdyDK7o8sUa8Yu7gLyuou6xF S99Do8CIpcKI9Y8fplgROrg6xe7LCE2AJ/seiFL/xHLUNJbV8DHY0MFmEcfBkmUO pN/Sk78AWbhOr154j92JtGbstLpSnlnhynBi28TUjiLqFX8hhr8UY2l1f/dv2YHt Lid1w== Received: from ediex01.ad.cirrus.com ([84.19.233.68]) by mx0b-001ae601.pphosted.com (PPS) with ESMTPS id 3x1ugm5b9y-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 26 Mar 2024 09:11:10 -0500 (CDT) Received: from ediex01.ad.cirrus.com (198.61.84.80) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Tue, 26 Mar 2024 14:11:08 +0000 Received: from ediswmail9.ad.cirrus.com (198.61.86.93) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4 via Frontend Transport; Tue, 26 Mar 2024 14:11:08 +0000 Received: from ediswws07.ad.cirrus.com (ediswws07.ad.cirrus.com [198.90.208.14]) by ediswmail9.ad.cirrus.com (Postfix) with ESMTP id 8FB80820241; Tue, 26 Mar 2024 14:11:08 +0000 (UTC) From: Charles Keepax To: , , CC: , , Subject: [PATCH 0/3] Add bridged amplifiers to cs42l43 Date: Tue, 26 Mar 2024 14:11:05 +0000 Message-ID: <20240326141108.1079993-1-ckeepax@opensource.cirrus.com> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: yAUZGjQ3m8CNU7ZvWaoqQu5QoNXcgut3 X-Proofpoint-GUID: yAUZGjQ3m8CNU7ZvWaoqQu5QoNXcgut3 X-Proofpoint-Spam-Reason: safe On some cs42l43 systems a couple of cs35l56 amplifiers are attached to the cs42l43's SPI and I2S. On Windows the cs42l43 is controlled by a SDCA class driver and these two amplifiers are controlled by firmware running on the cs42l43. However, under Linux the decision was made to interact with the cs42l43 directly, affording the user greater control over the audio system. However, this has resulted in an issue where these two bridged cs35l56 amplifiers are not populated in ACPI and must be added manually. There is at least an SDCA extension unit DT entry we can key off. The process of adding this is handled using a software node, firstly the ability to add native chip selects to software nodes must be added. Secondly, an additional flag for naming the SPI devices is added this allows the machine driver to key to the correct amplifier. Then finally, the cs42l43 SPI driver adds the two amplifiers directly onto its SPI bus. An additional series will follow soon to add the audio machine driver parts (in the sof-sdw driver), however that is fairly orthogonal to this part of the process, getting the actual amplifiers registered. Thanks, Charles Charles Keepax (2): gpio: swnode: Add ability to specify native chip selects for SPI spi: Add a mechanism to use the fwnode name for the SPI device Maciej Strozek (1): spi: cs42l43: Add bridged cs35l56 amplifiers drivers/gpio/gpiolib-swnode.c | 8 ++ drivers/gpio/gpiolib.c | 9 ++ drivers/spi/spi-cs42l43.c | 152 +++++++++++++++++++++++++++++++++- drivers/spi/spi.c | 7 ++ include/linux/gpio/consumer.h | 4 + include/linux/spi/spi.h | 2 + 6 files changed, 181 insertions(+), 1 deletion(-)