From nobody Tue Feb 10 03:37:38 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 EAEED392C43; Fri, 16 Jan 2026 14:32:38 +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=1768573959; cv=none; b=XJSSfbTIyNODHdnXerCsEcHjFAxhryJRxEZ7DM3gfaTFTiU7a+rgJjmK+Z73084zoaHYRsoKWpYROsgoSK5ne0BycRloZUf04zCzv8tA8/dS3B3iCuuIVwcjVtNZUA2UjiF/M3IQSKz+NnLNhxRK8DRDWsmwlrnZygRBZD3djuo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768573959; c=relaxed/simple; bh=cydN38l100wMdf4/ArcxvU5f/tYHQl/0FrnHEEJfGEY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=cPBKTWn7Bgbvz7APnAgMJc82BVeERJvjI/q9piTIjNjectzLITyDd+7QyLWRb2fAewEn/Fk2fAROtB1rfL97euxZyYlmKKXDR9dH/LEpJMNPbRDHe2TKk/elF+gdpG/W431KDzNPAZOm1SOi+DOpgu+SIbJw1UW9T9Zuw8gygjg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EFbQOKcs; 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="EFbQOKcs" Received: by smtp.kernel.org (Postfix) with ESMTPS id BED07C19423; Fri, 16 Jan 2026 14:32:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768573958; bh=cydN38l100wMdf4/ArcxvU5f/tYHQl/0FrnHEEJfGEY=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=EFbQOKcsnXeczKY4TGv5SJjluWiowx1tVcMG3rRLwJ4IWsa/0CjUI1LDv7xjctCTG bZXvnKopsvGDvAoURiDxOEqE76ajG3wK+UhkS0BmJ9zF5qUycpVD/0xw/SdjHrBb1i Fy22QWOFG4lKM+dIapFbOc/kURge7Hwj8to6xyeQXJS5Xsn6md8W1CIAH2UAQf4ILx dtLDIfFmZDW42v2eG/MdoRjpcvgqKJ8ooSwlGg6ZNvUrovZrtCzgF6k1mmW9dbJRsw HCyn6s9bxYUkKSHkThD4vMYux+dfZHIpQr4DjucZ/CV7r7IRDCZorI8HJd5RPKwbsk BPHEC92snBNkQ== 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 B64FBC982C5; Fri, 16 Jan 2026 14:32:38 +0000 (UTC) From: Rodrigo Alencar via B4 Relay Date: Fri, 16 Jan 2026 14:32:23 +0000 Subject: [PATCH v4 4/7] 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: <20260116-adf41513-iio-driver-v4-4-dbb7d6782217@analog.com> References: <20260116-adf41513-iio-driver-v4-0-dbb7d6782217@analog.com> In-Reply-To: <20260116-adf41513-iio-driver-v4-0-dbb7d6782217@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=1768573956; l=3002; i=rodrigo.alencar@analog.com; s=default; h=from:subject:message-id; bh=aTmu0dNsrjGGz+g8LnBK4RH9b4yL9PK+xZvKjCBO1KI=; b=Zcv4qybX05ubOQ1hkxkENmnYLJJiaW0tQBuKw6cJ1hptgbrVBJtzznFWXpJOoCJ5C+O87l+hk tiK+FyeSbz/DoToEX/0grQJBnj0NrOcPYqAOn+H2w5dvA4oOQWoRae1 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 | 35 ++++++++++++++++++++++++++++++++--- 1 file changed, 32 insertions(+), 3 deletions(-) diff --git a/drivers/iio/frequency/adf41513.c b/drivers/iio/frequency/adf41= 513.c index 9068c427d8e9..dfbe55bb6973 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 { @@ -698,13 +699,27 @@ 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) + 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); + if (ret) + return ret; + } + + return ret; } =20 static ssize_t adf41513_read_uhz(struct iio_dev *indio_dev, @@ -989,6 +1004,8 @@ static int adf41513_parse_fw(struct adf41513_state *st) "invalid lock detect count: %u\n", tmp); 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; @@ -996,6 +1013,7 @@ static int adf41513_parse_fw(struct adf41513_state *st) =20 static int adf41513_setup(struct adf41513_state *st) { + int ret; u32 tmp; =20 memset(st->regs_hw, 0xFF, sizeof(st->regs_hw)); @@ -1029,8 +1047,19 @@ 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 * MICRO, - ADF41513_SYNC_ALL); + ret =3D adf41513_set_frequency(st, st->data.power_up_frequency_hz * MICRO, + ADF41513_SYNC_ALL); + if (ret) + 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); + if (ret) + return ret; + } + + return 0; } =20 static void adf41513_power_down(void *data) --=20 2.43.0