From patchwork Thu Jan 9 13:37:07 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antoniu Miclaus X-Patchwork-Id: 13932549 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) (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 85639219EB6; Thu, 9 Jan 2025 13:37:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.135.77 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736429859; cv=none; b=B8S+xV4sZwQEUlMNqHsgx+JpfH8h9lYE7eIWPQu41bwYJNuKkv3wIrdQtgTmTPqECcdWBDbtUGyKglWoMBhcM12VYf6W2XcbAlCNAs8guouWixWQnG965xt+/SLkKV3Nrl/HkKvDK78GKhzyCEiPgSfQ1ADDCCpZzV7tdS2NvV0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736429859; c=relaxed/simple; bh=XM8cc2cMsapuBBA5NQbXE/qOSJJeq4jDMOM0QP2EmNE=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=DZuCIVVcGkI1iw5S/yqmLMtC87sII6CLbW5HHQOmNhv2XUDwrEKr8DJD8QrkdrMFx5Qx8FVVjDN8um28RJMTyh8lCIXAUTqYI/wzIuMadP0vt9R8XF43ZRnrric9hlrUfQb/2r4Ghu2mG4dFD9Bz63is0ybl3P24qIxxTeGRWIs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=analog.com; spf=pass smtp.mailfrom=analog.com; dkim=pass (2048-bit key) header.d=analog.com header.i=@analog.com header.b=OwxXzOdE; arc=none smtp.client-ip=148.163.135.77 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=analog.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=analog.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=analog.com header.i=@analog.com header.b="OwxXzOdE" Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 509DXiAF023778; Thu, 9 Jan 2025 08:37:23 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=analog.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=DKIM; bh=wz02k VKTF4YJF3KFhHO/ZY5Jy0O2O10nuXFSlWq9t0A=; b=OwxXzOdEuIBD6gGFtAhEY 0PocuWwvsZJNCPFUhztXzQZ0yHNHVCtgS9ppwloDGNaMTaJq/t+UXsjj0ZzCau25 /Vi23pvNehYQh53EAFFnQEUgHsdetRhpFAyOrOaGZHtXc1oiViF6N4tQ1yLoIasI KWdIKmTYHTwmbndqJKsygOvnrDrHCOz+XtLzQjNsfVs2oeZ0Ry5eR9QyiKU5Bnek E4qZ1+2pdpbuVCYNGAwBWxauTAxithfDrjTTPL3UKp8hW9yUY/9zWXiiu7g69wRT IHaJCf7wW1NRz5LjDWQdhKmSFePnHE7s0DgxB/9XmVl/JcFF9w5VOUkWp1Dm000/ Q== Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 4425tateyk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 09 Jan 2025 08:37:23 -0500 (EST) Received: from ASHBMBX8.ad.analog.com (ASHBMBX8.ad.analog.com [10.64.17.5]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 509DbMVf010900 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 9 Jan 2025 08:37:22 -0500 Received: from ASHBCASHYB5.ad.analog.com (10.64.17.133) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Thu, 9 Jan 2025 08:37:21 -0500 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBCASHYB5.ad.analog.com (10.64.17.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Thu, 9 Jan 2025 08:37:21 -0500 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Thu, 9 Jan 2025 08:37:21 -0500 Received: from amiclaus-VirtualBox.ad.analog.com (AMICLAUS-L02.ad.analog.com [10.48.65.136]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 509Db9ia009541; Thu, 9 Jan 2025 08:37:18 -0500 From: Antoniu Miclaus To: , , , , , , CC: Antoniu Miclaus Subject: [PATCH v4 3/3] iio: frequency: adf4371: add ref doubler Date: Thu, 9 Jan 2025 15:37:07 +0200 Message-ID: <20250109133707.3845-4-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250109133707.3845-1-antoniu.miclaus@analog.com> References: <20250109133707.3845-1-antoniu.miclaus@analog.com> Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: VHvzJdhUW31hIGf6JAbKQ5giydbfY9hJ X-Proofpoint-ORIG-GUID: VHvzJdhUW31hIGf6JAbKQ5giydbfY9hJ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 spamscore=0 phishscore=0 suspectscore=0 mlxscore=0 mlxlogscore=999 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501090109 Add support for the reference doubler. Signed-off-by: Antoniu Miclaus --- no changes in v4. drivers/iio/frequency/adf4371.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/iio/frequency/adf4371.c b/drivers/iio/frequency/adf4371.c index 50450e7b5464..a57fc24a6799 100644 --- a/drivers/iio/frequency/adf4371.c +++ b/drivers/iio/frequency/adf4371.c @@ -44,6 +44,8 @@ /* ADF4371_REG22 */ #define ADF4371_REFIN_MODE_MASK BIT(6) #define ADF4371_REFIN_MODE(x) FIELD_PREP(ADF4371_REFIN_MODE_MASK, x) +#define ADF4371_REF_DOUB_MASK BIT(5) +#define ADF4371_REF_DOUB(x) FIELD_PREP(ADF4371_REF_DOUB_MASK, x)\ /* ADF4371_REG24 */ #define ADF4371_RF_DIV_SEL_MSK GENMASK(6, 4) @@ -75,6 +77,9 @@ #define ADF4371_MAX_FREQ_REFIN 600000000UL /* Hz */ #define ADF4371_MAX_FREQ_REFIN_SE 500000000UL /* Hz */ +#define ADF4371_MIN_CLKIN_DOUB_FREQ 10000000ULL /* Hz */ +#define ADF4371_MAX_CLKIN_DOUB_FREQ 125000000ULL /* Hz */ + /* MOD1 is a 24-bit primary modulus with fixed value of 2^25 */ #define ADF4371_MODULUS1 33554432ULL /* MOD2 is the programmable, 14-bit auxiliary fractional modulus */ @@ -481,7 +486,7 @@ static const struct iio_info adf4371_info = { static int adf4371_setup(struct adf4371_state *st) { unsigned int synth_timeout = 2, timeout = 1, vco_alc_timeout = 1; - unsigned int vco_band_div, tmp; + unsigned int vco_band_div, tmp, ref_doubler_en = 0; int ret; /* Perform a software reset */ @@ -514,8 +519,14 @@ static int adf4371_setup(struct adf4371_state *st) (!st->ref_diff_en && st->clkin_freq > ADF4371_MAX_FREQ_REFIN_SE)) return -EINVAL; + if (st->clkin_freq < ADF4371_MAX_CLKIN_DOUB_FREQ && + st->clkin_freq > ADF4371_MIN_CLKIN_DOUB_FREQ) + ref_doubler_en = 1; + ret = regmap_update_bits(st->regmap, ADF4371_REG(0x22), + ADF4371_REF_DOUB_MASK | ADF4371_REFIN_MODE_MASK, + ADF4371_REF_DOUB(ref_doubler_en) | ADF4371_REFIN_MODE(st->ref_diff_en)); if (ret < 0) return ret; @@ -529,7 +540,8 @@ static int adf4371_setup(struct adf4371_state *st) */ do { st->ref_div_factor++; - st->fpfd = st->clkin_freq / st->ref_div_factor; + st->fpfd = st->clkin_freq * (1 + ref_doubler_en) / + st->ref_div_factor; } while (st->fpfd > ADF4371_MAX_FREQ_PFD); /* Calculate Timeouts */