From patchwork Mon Dec 9 10:41:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antoniu Miclaus X-Patchwork-Id: 13899279 Received: from mx0b-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 097E52165FD; Mon, 9 Dec 2024 10:42:52 +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=1733740975; cv=none; b=Q0ar0ty6FBE7PjfkYlxy7QPZd5jGpDDvKrpttW7PjSYsg4kmUHjP3kO3Uru/11bDP5QFS9gEhbSK1/BoHW5z1JNYqJZeR+pyuspd4dkOeBtuWwA9C93fNTcNi5OgWKz//1bAaM2PpR9OMx2X3V5b8evXVLMecVI65Aao5ST80ik= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733740975; c=relaxed/simple; bh=SM6swpyt8jyb0ikai78MJrCg7kSAZsAaAumPcFkP1i0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=UE8tmaoSEKp8dZDucLP68CvEljGktNP3S9bFa/PAbKlRRCkVLD2IZrocRfFlj+7E8HUVgqwoLARtmH+9xlbTOUrFY0fcoQaW07RyBbOESDcvf3nwDWzaFk3yQKNP5Lr3HAGOqNYYEwlctBEWJdhtnrAMCXl1aiW6Eqf8XN1Z+xY= 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=mOKT+Y6X; 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="mOKT+Y6X" Received: from pps.filterd (m0375855.ppops.net [127.0.0.1]) by mx0b-00128a01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4B97E6Nr024881; Mon, 9 Dec 2024 05:42:38 -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=tYhmV 12hRFOk2EbO6khmI3eie7oSghHEWzk+IUbPKBY=; b=mOKT+Y6XvIL/Xv1X23BrK tpSqA5N0HYW9G+1pfTmma4NisKRJmEWYhl0xBQsaqfeP3HrH3PUa9J1YHVHzH3+6 W0kEYCHGk0hxCjSYVjRtt77GM4OA9GeONthrbBdcRlYxBJZX6aRaatCDyEhoCLUI fKPEF4KdDsG/5OWgiJKWIz14DGJCW0O8O6tE/NsNTHK3YcarLa2O24jS9YKcY3A5 vpcv4NqOFEDvlPTZ/5gFVxvUN8a8o4Q7S+hEu6REBTYO++wgMyRECzfI1OhFta8O OjBL2tRO2pleNtZ9sL+aIvQ5oUP1eS6CfKufZBZaUsEFlFp2S70rsc6YKUnEqZrg w== Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0b-00128a01.pphosted.com (PPS) with ESMTPS id 43duyw8vuf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 09 Dec 2024 05:42:37 -0500 (EST) Received: from ASHBMBX9.ad.analog.com (ASHBMBX9.ad.analog.com [10.64.17.10]) by nwd2mta3.analog.com (8.14.7/8.14.7) with ESMTP id 4B9AgaP7010907 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 9 Dec 2024 05:42:36 -0500 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Mon, 9 Dec 2024 05:42:36 -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; Mon, 9 Dec 2024 05:42:36 -0500 Received: from amiclaus-VirtualBox.ad.analog.com (AMICLAUS-L02.ad.analog.com [10.48.65.187]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 4B9AgQVT004359; Mon, 9 Dec 2024 05:42:33 -0500 From: Antoniu Miclaus To: , , , , , , CC: Antoniu Miclaus Subject: [PATCH v2 3/3] iio: frequency: adf4371: add ref doubler Date: Mon, 9 Dec 2024 12:41:33 +0200 Message-ID: <20241209104201.25205-3-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241209104201.25205-1-antoniu.miclaus@analog.com> References: <20241209104201.25205-1-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-ORIG-GUID: 4HeFODJ2jYYahXkO8ttp9jO48FsUlMom X-Proofpoint-GUID: 4HeFODJ2jYYahXkO8ttp9jO48FsUlMom 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 lowpriorityscore=0 bulkscore=0 clxscore=1015 adultscore=0 spamscore=0 suspectscore=0 mlxscore=0 mlxlogscore=999 malwarescore=0 impostorscore=0 phishscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412090084 Add support for the reference doubler. Signed-off-by: Antoniu Miclaus --- changes in v2: - drop redundant brackets. drivers/iio/frequency/adf4371.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/iio/frequency/adf4371.c b/drivers/iio/frequency/adf4371.c index 55bee06fb42d..fd33a6f1cd9a 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 */ @@ -480,7 +485,7 @@ 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; bool ref_diff_en; int ret; @@ -516,6 +521,10 @@ static int adf4371_setup(struct adf4371_state *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_REFIN_MODE_MASK, ADF4371_REFIN_MODE(ref_diff_en)); @@ -531,7 +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 */