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Wed, 14 Oct 2026 18:57:44 +0200 Message-ID: <0cf0f3ca-bcb5-47d2-a4c7-9a3ab03d7293@foss.st.com> Date: Wed, 14 Oct 2026 18:57:42 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/3] iio: adc: add stm32 mdf support To: Andy Shevchenko CC: Jonathan Cameron , David Lechner , =?UTF-8?Q?Nuno_S=C3=A1?= , "Andy Shevchenko" , Maxime Coquelin , Alexandre Torgue , Philipp Zabel , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= , , , , , , , References: <20261001145702.2628429-1-olivier.moysan@foss.st.com> <20261001145702.2628429-3-olivier.moysan@foss.st.com> Content-Language: en-US From: Olivier MOYSAN In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: ENXCAS1NODE2.st.com (10.75.128.138) To STKDAG1NODE2.st.com (10.75.128.133) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MI3PEPF00008491:EE_|DU4PR10MB8999:EE_ X-MS-Office365-Filtering-Correlation-Id: 176e283a-aa03-45a3-a395-08df2a144522 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|34020700016|82310400026|23010399003|36860700016|7416014|376014|4143699003|56012099006|11063799006|10067099003|261009221227099003|261009223027099003|22082099003|18002099003|6133799003|12100799066; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 5cZJCHhw/6cOM0KYgDWB2RtGzXCJ6toa5McRJS2Mj33g8g622eQqFBH794aqUHj0rakygtWCUem8o+C+yfsxLBhHdRRg8Wktih298E7w4KCF2RkqxfEKt8TW1ssQtL6ke58gMIcctbhz5O3mU6PDUIuQuCiiaalIxY5IwY+E9r1z/R68YfTuYyg/1sAhmSG9Zh/hsVdGBriU/4E/zpgea0sY/EF1IkowodyZdIjsiBcbLuYo+5oOwkT8ObdLo9tA4vi52dccqi4JpjhS0kskWzIn2UFEVGVkpCHNjdV+FNnpJ9oLyZFysAmlPok85XrJLS5NarlGDWAPMcp6uQSpjo1gXibFMsGc30qjAp61TgU2oizMYjiOFf0ME74OFFkxZ5bZGA5qCrnhAsg/F6OkGFNKG7hxadvnP5r+Vk0w1+8gUBmCseO84doPVnNRuUk1 X-OriginatorOrg: foss.st.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Oct 2026 16:57:45.7078 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 176e283a-aa03-45a3-a395-08df2a144522 X-MS-Exchange-CrossTenant-Id: 75e027c9-20d5-47d5-b82f-77d7cd041e8f X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=75e027c9-20d5-47d5-b82f-77d7cd041e8f;Ip=[164.130.1.60];Helo=[smtpO365.st.com] X-MS-Exchange-CrossTenant-AuthSource: MI3PEPF00008491.eurprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU4PR10MB8999 Hi Andy, On 10/1/26 21:13, Andy Shevchenko wrote: > On Thu, Oct 01, 2026 at 04:56:46PM +0200, Olivier Moysan wrote: >> Add the STM32 Multi-function Digital Filter (MDF) core, serial interface >> and digital filter drivers. The MDF converts bitstreams from sigma-delta >> modulators or digital microphones into samples exposed through IIO. >> >> Audio: capture PDM microphones via cyclic DMA for an ASoC consumer. >> Support CIC scaling and filtering, synchronized and interleaving modes. >> Audio use case requires a DMIC filter, and a separate ASoC DAI. >> >> Analog: expose sigma-delta modulators as IIO voltage channels with >> direct reads or DMA buffering mode. STM32 timer triggers can be used as >> clock source. >> Analog use case requires an IIO backend for the SD modulator. >> >> Signed-off-by: Olivier Moysan >> --- >> drivers/iio/adc/Kconfig | 27 + >> drivers/iio/adc/Makefile | 3 + >> drivers/iio/adc/stm32-mdf-adc.c | 2078 +++++++++++++++++++++++++ >> drivers/iio/adc/stm32-mdf-core.c | 857 ++++++++++ >> drivers/iio/adc/stm32-mdf-serial.c | 309 ++++ >> drivers/iio/adc/stm32-mdf.h | 312 ++++ >> include/linux/iio/adc/stm32-mdf-adc.h | 19 + >> 7 files changed, 3605 insertions(+) > > Unreviewable. Make sure the single patch is ~750 lines. > > Ok. I am preparing a v2 series to reduce the size of the patches. Best Regards olivier