From nobody Tue Apr 7 05:58:51 2026 Received: from mail11.truemail.it (mail11.truemail.it [217.194.8.81]) (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 6D78C3502A5; Mon, 16 Mar 2026 07:36:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.194.8.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773646568; cv=none; b=tDdoXFT6SG0lcsVXRorTyCdKvyoQAN5HTJT7QU5LysvowsfS+EJaMZFi5MA5zC2MEV8qVWYrBG1br0GIFXrSZ+wQthi4DxcHKTBay4mj8KEsPtMD2Ov6E5yOMg8L2BjYAj5dg7Oay82HKp2hy+IdjipzpAY7qdJ28f8mZZykNsM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773646568; c=relaxed/simple; bh=2ubS2qnPkPudQEnTuJ3t2t63NV81Kdy+xZzs1jM9VaM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ev74A6svLIq/bykpKw3ra9i+pQyZFFbVEsIlLmNzXGAr5lpaEqcOX+6SMiMbWp4YHstdLDJmCrSvRL4uoMjVJ5382jk1+l4BTfIlQsqISntvTpGOEzPdIr6gkA5KfE38p/xNSGM9PDyvbJn1LBTn4NOtI9FqSvkBBUyfqr3Dbgw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it; spf=pass smtp.mailfrom=dolcini.it; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b=LkozeCjE; arc=none smtp.client-ip=217.194.8.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=dolcini.it Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b="LkozeCjE" Received: from francesco-nb.corp.toradex.com (248.201.173.83.static.wline.lns.sme.cust.swisscom.ch [83.173.201.248]) by mail11.truemail.it (Postfix) with ESMTPA id C86B520735; Mon, 16 Mar 2026 08:35:56 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dolcini.it; s=default; t=1773646557; bh=jWspq/mVUrwz2X5u/LQpuWjjmowam1smt13kBCpMazw=; h=From:To:Subject; b=LkozeCjEFYbV0XUbpaFaXgbpgzU7jwK/53gftC5UPAUKgwUurlD8HwQSyElgRiGGj LNb/7crzcX9uBxSBJ0ASwVFV9qRm7tczsMk4l2aMQ9boKuDX/C7W9GzB0SsOh6pJnB SOQMtVN7ArjqrKbTE7PAS7EvupRCSpJrq8UO8B9dNdgChxycrIw1X/MBgFXr8v4h72 26RUSIUewozGcC5l3dInPnKctafSSV5ctOd4Q09bE67yZqAyw9UIuxd2V1r53vEZSl 0xZQJeW4COnqD6AGITDZ4gYWv1PFS8VSGhQTXfjXk8xW602CMnRQw5OGtcenkDh2W5 zlAcbdjZNcAiA== From: Francesco Dolcini To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Mark Brown Cc: Francesco Dolcini , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org Subject: [PATCH v1 2/2] spi: spidev: Add data loopback OF compatible Date: Mon, 16 Mar 2026 08:35:44 +0100 Message-ID: <20260316073547.11437-3-francesco@dolcini.it> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260316073547.11437-1-francesco@dolcini.it> References: <20260316073547.11437-1-francesco@dolcini.it> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Francesco Dolcini Add "spi-miso-mosi-loopback" OF compatible, that describes a single wire loopback between the two data signals, MISO and MOSI. This kind of setup can be used for testing the SPI functionality. Link: https://lore.kernel.org/all/20260310133254.GA51497@francesco-nb/ Signed-off-by: Francesco Dolcini --- drivers/spi/spidev.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c index 638221178384..3874fd449580 100644 --- a/drivers/spi/spidev.c +++ b/drivers/spi/spidev.c @@ -701,6 +701,7 @@ static const struct spi_device_id spidev_spi_ids[] =3D { { .name =3D /* semtech */ "sx1301" }, { .name =3D /* silabs */ "em3581" }, { .name =3D /* silabs */ "si3210" }, + { .name =3D "spi-miso-mosi-loopback" }, {}, }; MODULE_DEVICE_TABLE(spi, spidev_spi_ids); @@ -735,6 +736,7 @@ static const struct of_device_id spidev_dt_ids[] =3D { { .compatible =3D "semtech,sx1301", .data =3D &spidev_of_check }, { .compatible =3D "silabs,em3581", .data =3D &spidev_of_check }, { .compatible =3D "silabs,si3210", .data =3D &spidev_of_check }, + { .compatible =3D "spi-miso-mosi-loopback", .data =3D &spidev_of_check }, {}, }; MODULE_DEVICE_TABLE(of, spidev_dt_ids); --=20 2.47.3