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Fri, 7 Feb 2025 09:09:59 -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; Fri, 7 Feb 2025 09:09:59 -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; Fri, 7 Feb 2025 09:09:58 -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; Fri, 7 Feb 2025 09:09:58 -0500 Received: from amiclaus-VirtualBox.ad.analog.com (AMICLAUS-L02.ad.analog.com [10.48.65.147]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 517E9a4t015095; Fri, 7 Feb 2025 09:09:51 -0500 From: Antoniu Miclaus To: , , , , , , CC: Antoniu Miclaus Subject: [PATCH v12 7/9] iio: adc: adi-axi-adc: add oversampling Date: Fri, 7 Feb 2025 16:09:16 +0200 Message-ID: <20250207140918.7814-8-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250207140918.7814-1-antoniu.miclaus@analog.com> References: <20250207140918.7814-1-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-Authority-Analysis: v=2.4 cv=Bdgi0qt2 c=1 sm=1 tr=0 ts=67a61438 cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=T2h4t0Lz3GQA:10 a=gAnH3GRIAAAA:8 a=WWjZrUSA4sH6CW72oAUA:9 a=oVHKYsEdi7-vN-J5QA_j:22 X-Proofpoint-ORIG-GUID: SU97IFRppfw2CSINHMvnDyXyJEFa75UA X-Proofpoint-GUID: SU97IFRppfw2CSINHMvnDyXyJEFa75UA 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=2025-02-07_06,2025-02-07_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 malwarescore=0 suspectscore=0 adultscore=0 phishscore=0 priorityscore=1501 mlxlogscore=999 clxscore=1015 spamscore=0 impostorscore=0 bulkscore=0 lowpriorityscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2501170000 definitions=main-2502070108 Add support for enabling/disabling oversampling. Signed-off-by: Antoniu Miclaus --- no changes in v12. drivers/iio/adc/adi-axi-adc.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c index 272d82c6e887..872ff51e08a7 100644 --- a/drivers/iio/adc/adi-axi-adc.c +++ b/drivers/iio/adc/adi-axi-adc.c @@ -46,6 +46,7 @@ #define ADI_AXI_ADC_CTRL_DDR_EDGESEL_MASK BIT(1) #define ADI_AXI_ADC_REG_CNTRL_3 0x004c +#define AD485X_CNTRL_3_OS_EN_MSK BIT(2) #define AD485X_CNTRL_3_PACKET_FORMAT_MSK GENMASK(1, 0) #define AD485X_PACKET_FORMAT_20BIT 0x0 #define AD485X_PACKET_FORMAT_24BIT 0x1 @@ -363,6 +364,28 @@ static int axi_adc_data_size_set(struct iio_backend *back, unsigned int size) FIELD_PREP(AD485X_CNTRL_3_PACKET_FORMAT_MSK, val)); } +static int axi_adc_oversampling_ratio_set(struct iio_backend *back, + unsigned int ratio) +{ + struct adi_axi_adc_state *st = iio_backend_get_priv(back); + + /* The current state of the function enables or disables the + * oversampling in REG_CNTRL_3 register. A ratio equal to 1 implies no + * oversampling, while a value greater than 1 implies oversampling being + * enabled. + */ + switch (ratio) { + case 0: + return -EINVAL; + case 1: + return regmap_clear_bits(st->regmap, ADI_AXI_ADC_REG_CNTRL_3, + AD485X_CNTRL_3_OS_EN_MSK); + default: + return regmap_set_bits(st->regmap, ADI_AXI_ADC_REG_CNTRL_3, + AD485X_CNTRL_3_OS_EN_MSK); + } +} + static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back, struct iio_dev *indio_dev) { @@ -428,6 +451,7 @@ static const struct iio_backend_ops adi_ad485x_ops = { .chan_status = axi_adc_chan_status, .interface_type_get = axi_adc_interface_type_get, .data_size_set = axi_adc_data_size_set, + .oversampling_ratio_set = axi_adc_oversampling_ratio_set, .debugfs_reg_access = iio_backend_debugfs_ptr(axi_adc_reg_access), .debugfs_print_chan_status = iio_backend_debugfs_ptr(axi_adc_debugfs_print_chan_status), };