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Mon, 27 Jan 2025 05:10:44 -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; Mon, 27 Jan 2025 05:10:44 -0500 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) 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; Mon, 27 Jan 2025 05:10:44 -0500 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Mon, 27 Jan 2025 05:10:44 -0500 Received: from amiclaus-VirtualBox.ad.analog.com (AMICLAUS-L02.ad.analog.com [10.48.65.165]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 50RAATiF016396; Mon, 27 Jan 2025 05:10:38 -0500 From: Antoniu Miclaus To: , , , , , , CC: Antoniu Miclaus , Nuno Sa Subject: [PATCH v6 3/3] iio: frequency: adf4371: add ref doubler Date: Mon, 27 Jan 2025 12:10:23 +0200 Message-ID: <20250127101026.5320-4-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250127101026.5320-1-antoniu.miclaus@analog.com> References: <20250127101026.5320-1-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: ciDjAtyXFODfpvmxmTgMhF8NG_-Wf75- X-Proofpoint-GUID: ciDjAtyXFODfpvmxmTgMhF8NG_-Wf75- X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-01-27_04,2025-01-27_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 suspectscore=0 malwarescore=0 phishscore=0 clxscore=1015 spamscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 adultscore=0 impostorscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501270081 Add support for the reference doubler. Reviewed-by: Nuno Sa Signed-off-by: Antoniu Miclaus --- changes in v6: - rebase with latest version and resolve conflicts. 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 205dfd341489..55516ececb23 100644 --- a/drivers/iio/frequency/adf4371.c +++ b/drivers/iio/frequency/adf4371.c @@ -45,6 +45,8 @@ /* 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) @@ -76,6 +78,9 @@ #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 */ @@ -483,7 +488,7 @@ 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 */ @@ -516,8 +521,14 @@ 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; @@ -531,7 +542,8 @@ 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 */