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Fri, 29 May 2026 10:14:24 -0400 From: Antoniu Miclaus To: =?UTF-8?q?Nuno=20S=C3=A1?= , Michael Hennerich , Antoniu Miclaus , Jonathan Cameron , David Lechner , Rob Herring , Krzysztof Kozlowski , Conor Dooley , , , , CC: Conor Dooley Subject: [PATCH v2 1/2] dt-bindings: iio: adc: ad4080: add AD4884 support Date: Fri, 29 May 2026 17:13:52 +0300 Message-ID: <20260529141353.8492-2-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260529141353.8492-1-antoniu.miclaus@analog.com> References: <20260529141353.8492-1-antoniu.miclaus@analog.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: 3xjM2n8VOb9ksWuRsSmO0o5u_3yRyf-2 X-Proofpoint-ORIG-GUID: 3xjM2n8VOb9ksWuRsSmO0o5u_3yRyf-2 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTI5MDE0MiBTYWx0ZWRfX3ZJRZ7jEHFUG BiVJJm633CulUZghLeiAlzDRG0ityKl109786RVgvrwS75/HMFM3J0i1r5beHmi7WdEWHGSi6fj lwaL2Pu1+0DoYjh6JeJ+5aFWSxD6U7BPSSly9NQvPBm1iYwUK241NY0zRmkHZetsNdqhtpFU40h VZ/pOY1E1+xCJm7XWmLUPNe+MfOhFuz7pGiqJxPCNR0TptNtaIFv76226bP8CaIQBvlB9JnkW5m gODfa/+eX3Nxen5ttPF0/cYX0RgLlNDf8/D5vhwAwO+QopGS0lUDsRVfMVZecsEz+FOHxCYDUQh XMuXxk6DYwQxDLFvLRCHkBR10C2vAGxByMQxNwrDWmVFsmiiiqafOtw1syNwhb1DHjtn82OlYKK Oa0TkC7nc0KJokDRWHhH1KxhTkgzLyKSKsdlKWP2mwcPIV+WStt38mMa9WKpazjMuIEVKc1prHr 3U3FR3kCqs85S1Ye7Qw== X-Authority-Analysis: v=2.4 cv=Bt+tB4X5 c=1 sm=1 tr=0 ts=6a199f49 cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=0sLvza09kfJOxVLZPwjg:22 a=uXIjobp8t2wMuQ0fPvqm:22 a=XYAwZIGsAAAA:8 a=gAnH3GRIAAAA:8 a=w5vykfj34SSMQZsSxmwA:9 a=E8ToXWR_bxluHZ7gmE-Z:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-05-29_04,2026-05-28_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 clxscore=1015 spamscore=0 bulkscore=0 adultscore=0 phishscore=0 lowpriorityscore=0 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605210000 definitions=main-2605290142 Content-Type: text/plain; charset="utf-8" Add AD4884 compatible string to the AD4080 devicetree binding. The AD4884 is a dual-channel, 16-bit, 40 MSPS SAR ADC, sharing the same register map and interface as the AD4080 family. Like the AD4880, it requires two SPI chip selects and two io-backends for its independent ADC channels. The AD4884 differs from the AD4880 in resolution (16-bit vs 20-bit), which requires distinct channel configuration in the driver, precluding a fallback compatible. Acked-by: Conor Dooley Signed-off-by: Antoniu Miclaus --- Changes in v2: - Add rationale for no fallback compatible in commit message. - Collect Acked-by tag. Documentation/devicetree/bindings/iio/adc/adi,ad4080.yaml | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4080.yaml b/Do= cumentation/devicetree/bindings/iio/adc/adi,ad4080.yaml index 9c6a56c7c8ef..4a3f7d3e05c3 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad4080.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4080.yaml @@ -39,6 +39,7 @@ properties: - adi,ad4087 - adi,ad4088 - adi,ad4880 + - adi,ad4884 =20 reg: minItems: 1 @@ -99,7 +100,9 @@ allOf: properties: compatible: contains: - const: adi,ad4880 + enum: + - adi,ad4880 + - adi,ad4884 then: properties: reg: --=20 2.43.0 From nobody Mon Jun 8 11:02:52 2026 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 DCAFA3E928F; Fri, 29 May 2026 14:14:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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charset="utf-8" Add support for the AD4884, a dual-channel, 16-bit, 40 MSPS SAR ADC. The AD4884 is the dual-channel variant of the AD4084, sharing the same register map and SPI interface as the rest of the AD4080 family. Like the AD4880, it uses two independent ADC channels, each with its own SPI configuration interface. Signed-off-by: Antoniu Miclaus --- Changes in v2: - No changes. drivers/iio/adc/ad4080.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/iio/adc/ad4080.c b/drivers/iio/adc/ad4080.c index 265d85ac171a..764d49eca9e0 100644 --- a/drivers/iio/adc/ad4080.c +++ b/drivers/iio/adc/ad4080.c @@ -136,6 +136,7 @@ #define AD4087_CHIP_ID 0x0057 #define AD4088_CHIP_ID 0x0058 #define AD4880_CHIP_ID 0x0750 +#define AD4884_CHIP_ID 0x005C =20 #define AD4080_MAX_CHANNELS 2 =20 @@ -541,6 +542,11 @@ static const struct iio_chan_spec ad4880_channels[] = =3D { AD4880_CHANNEL_DEFINE(20, 32, 1), }; =20 +static const struct iio_chan_spec ad4884_channels[] =3D { + AD4880_CHANNEL_DEFINE(16, 16, 0), + AD4880_CHANNEL_DEFINE(16, 16, 1), +}; + static const struct ad4080_chip_info ad4080_chip_info =3D { .name =3D "ad4080", .product_id =3D AD4080_CHIP_ID, @@ -641,6 +647,16 @@ static const struct ad4080_chip_info ad4880_chip_info = =3D { .lvds_cnv_clk_cnt_max =3D AD4080_LVDS_CNV_CLK_CNT_MAX, }; =20 +static const struct ad4080_chip_info ad4884_chip_info =3D { + .name =3D "ad4884", + .product_id =3D AD4884_CHIP_ID, + .scale_table =3D ad4080_scale_table, + .num_scales =3D ARRAY_SIZE(ad4080_scale_table), + .num_channels =3D 2, + .channels =3D ad4884_channels, + .lvds_cnv_clk_cnt_max =3D 2, +}; + static int ad4080_setup_channel(struct ad4080_state *st, unsigned int ch) { struct device *dev =3D regmap_get_device(st->regmap[ch]); @@ -843,6 +859,7 @@ static const struct spi_device_id ad4080_id[] =3D { { "ad4087", (kernel_ulong_t)&ad4087_chip_info }, { "ad4088", (kernel_ulong_t)&ad4088_chip_info }, { "ad4880", (kernel_ulong_t)&ad4880_chip_info }, + { "ad4884", (kernel_ulong_t)&ad4884_chip_info }, { } }; MODULE_DEVICE_TABLE(spi, ad4080_id); @@ -858,6 +875,7 @@ static const struct of_device_id ad4080_of_match[] =3D { { .compatible =3D "adi,ad4087", &ad4087_chip_info }, { .compatible =3D "adi,ad4088", &ad4088_chip_info }, { .compatible =3D "adi,ad4880", &ad4880_chip_info }, + { .compatible =3D "adi,ad4884", &ad4884_chip_info }, { } }; MODULE_DEVICE_TABLE(of, ad4080_of_match); --=20 2.43.0