From nobody Mon Feb 9 16:02:17 2026 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 D69FF4A1A7D; Thu, 8 Jan 2026 12:15:16 +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=1767874517; cv=none; b=Mgv+7qT/MetqkymfCmSDQ0+2MupBeL0TX6Dn4yonNWBijphfpKtuEUD1mq363MVvC4ikhtu3nfLOCXSetLmTAjiKrUcvJaUv1GEDv/ccg6tfuFG2zgxDNxRWgnQdNtlJxbSlfXEbPMzrHzuyLpmKG/7azs8gW0EEG7xnQBFnBIQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767874517; c=relaxed/simple; bh=d+AUQ+0Q0G7xnUBpM4myxGc7BPezAhRHEHHX4yBWl6w=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=VCDAREF+IdZ8zTGIgntgDCkqOdOU991rvTcjRmGn+kONZiAfTKOteECFK9wiSSKiLrCd2q6fKQHi17BrNJ1iOnPZcclAn/t63vvSzHjThIBO24iyj5qqIRVnu7F2x4dkLz+C295KsffQQLgtKYEjsgX/qTtXCFVsjpBm7O1V8fE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KkXzmfKF; 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="KkXzmfKF" Received: by smtp.kernel.org (Postfix) with ESMTPS id 5264DC19424; Thu, 8 Jan 2026 12:15:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767874515; bh=d+AUQ+0Q0G7xnUBpM4myxGc7BPezAhRHEHHX4yBWl6w=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=KkXzmfKFx0WXPrZ0YnCwyvOmjtkAZy5e84sSn6pRvt9Ewd6u0u6m3K10p+hhHOx/v tT5oX64jadziVPozT2YHyTd1KJ92/KXY8SVhdP3ksKLxg6M+niwV/v4ziZOEuYNwWg Gb5hROkHxjeaAj6iidLQtkq1daCq/mCY1ts+JsI2XINWH1+X4lUmq7z9142haD9mpj X/s734CFsrWvXd9yhjQ9iz85EYIbJPK8rHQlKse58PAtvUQlVU888Zi1tKLjGeo5hM exBbAtKxoYNXsRtLhf+8flHi8neiHS5zoHAffBTCuWHdpJCdVx+UoCUPeT6DeFxrG+ JjfYWsezGwAJw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 46FE5D185E7; Thu, 8 Jan 2026 12:15:15 +0000 (UTC) From: Rodrigo Alencar via B4 Relay Date: Thu, 08 Jan 2026 12:14:52 +0000 Subject: [PATCH v3 3/6] iio: frequency: adf41513: handle LE synchronization feature Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260108-adf41513-iio-driver-v3-3-23d1371aef48@analog.com> References: <20260108-adf41513-iio-driver-v3-0-23d1371aef48@analog.com> In-Reply-To: <20260108-adf41513-iio-driver-v3-0-23d1371aef48@analog.com> To: linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org Cc: Jonathan Cameron , David Lechner , Andy Shevchenko , Lars-Peter Clausen , Michael Hennerich , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Corbet , Rodrigo Alencar X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1767874513; l=2933; i=rodrigo.alencar@analog.com; s=default; h=from:subject:message-id; bh=X9/n4zTkaJgPCbGxxfeWNVQxYgRQ+AOLCLzn3Kd+1lY=; b=M9/lJEnRdexE2rLI5Z5cDbipXXX0TqcrPlQoA7EnXZJ05UYVJBYVtmi3lFqeJhmglc4JTmqKP TLwxh4na/e/ABporUU3NF4DSnkInPtizdOs7vh+2d8jTBFKb9zPxtjK X-Developer-Key: i=rodrigo.alencar@analog.com; a=ed25519; pk=ULeHbgU/OYh/PG/4anHDfLgldFItQHAhOktYRVLMFRo= X-Endpoint-Received: by B4 Relay for rodrigo.alencar@analog.com/default with auth_id=561 X-Original-From: Rodrigo Alencar Reply-To: rodrigo.alencar@analog.com From: Rodrigo Alencar When LE sync is enabled, it is must be set after powering up and must be disabled when powering down. It is recommended when using the PLL as a frequency synthesizer, where reference signal will always be present while the device is being configured. Signed-off-by: Rodrigo Alencar --- drivers/iio/frequency/adf41513.c | 32 +++++++++++++++++++++++++++++--- 1 file changed, 29 insertions(+), 3 deletions(-) diff --git a/drivers/iio/frequency/adf41513.c b/drivers/iio/frequency/adf41= 513.c index 69dcbbc1f393..0cdf24989c93 100644 --- a/drivers/iio/frequency/adf41513.c +++ b/drivers/iio/frequency/adf41513.c @@ -220,6 +220,7 @@ struct adf41513_data { bool phase_detector_polarity; =20 bool logic_lvl_1v8_en; + bool le_sync_en; }; =20 struct adf41513_pll_settings { @@ -697,13 +698,25 @@ static int adf41513_set_frequency(struct adf41513_sta= te *st, u64 freq_uhz, u16 s static int adf41513_suspend(struct adf41513_state *st) { st->regs[ADF41513_REG6] |=3D FIELD_PREP(ADF41513_REG6_POWER_DOWN_MSK, 1); + st->regs[ADF41513_REG12] &=3D ~ADF41513_REG12_LE_SELECT_MSK; return adf41513_sync_config(st, ADF41513_SYNC_DIFF); } =20 static int adf41513_resume(struct adf41513_state *st) { + int ret; + st->regs[ADF41513_REG6] &=3D ~ADF41513_REG6_POWER_DOWN_MSK; - return adf41513_sync_config(st, ADF41513_SYNC_DIFF); + ret =3D adf41513_sync_config(st, ADF41513_SYNC_DIFF); + if (ret < 0) + return ret; + + if (st->data.le_sync_en) { + st->regs[ADF41513_REG12] |=3D ADF41513_REG12_LE_SELECT_MSK; + ret =3D adf41513_sync_config(st, ADF41513_SYNC_DIFF); + } + + return ret; } =20 static ssize_t adf41513_read_uhz(struct iio_dev *indio_dev, @@ -994,6 +1007,8 @@ static int adf41513_parse_fw(struct adf41513_state *st) st->data.lock_detect_count =3D tmp; } =20 + /* load enable sync */ + st->data.le_sync_en =3D device_property_read_bool(dev, "adi,le-sync-enabl= e"); st->data.freq_resolution_uhz =3D MICROHZ_PER_HZ; =20 return 0; @@ -1001,6 +1016,7 @@ static int adf41513_parse_fw(struct adf41513_state *s= t) =20 static int adf41513_setup(struct adf41513_state *st) { + int ret; u32 tmp; =20 memset(st->regs_hw, 0xFF, sizeof(st->regs_hw)); @@ -1034,8 +1050,18 @@ static int adf41513_setup(struct adf41513_state *st) st->data.logic_lvl_1v8_en ? 0 : 1); =20 /* perform initialization sequence with power-up frequency */ - return adf41513_set_frequency(st, st->data.power_up_frequency_hz * MICROH= Z_PER_HZ, - ADF41513_SYNC_ALL); + ret =3D adf41513_set_frequency(st, + st->data.power_up_frequency_hz * MICROHZ_PER_HZ, + ADF41513_SYNC_ALL); + if (ret < 0) + return ret; + + if (st->data.le_sync_en) { + st->regs[ADF41513_REG12] |=3D ADF41513_REG12_LE_SELECT_MSK; + ret =3D adf41513_sync_config(st, ADF41513_SYNC_DIFF); + } + + return ret; } =20 static void adf41513_power_down(void *data) --=20 2.43.0