From patchwork Fri Aug 4 14:28:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: marius.cristea@microchip.com X-Patchwork-Id: 13341933 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 053E4C04A94 for ; Fri, 4 Aug 2023 14:28:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231591AbjHDO2h (ORCPT ); Fri, 4 Aug 2023 10:28:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52098 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230167AbjHDO2g (ORCPT ); Fri, 4 Aug 2023 10:28:36 -0400 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.153.233]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57FD946BD; Fri, 4 Aug 2023 07:28:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1691159316; x=1722695316; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=cMxNDVoCT7U2c8LDnOx4x6P4H2Z/5ySoVsVybi9RDb8=; b=yj07P80szovkUlwNkHVaZBJN10PFFFB6mg8AcdsbWVphigXrco5Bju8r Kej6OPP/jVoh7ZON1BA18FcnxnR9wQ+0eBoG5zmaIbdUKCSwAn+V0YNYm fPQiEIu9LVr20HeT2KYAYlTO4htxalqxv0bLn/VRZ4ZCYm3GvbzZtQR6k CbVTEdrd+P/maXf3ogrA51pMCN80GbweIXSQVtkbd2+b5vX0vtucRdwv0 Dh6YKXG5dy0GGayUFzlIhQJdByGcLMUUSWpujeVQwjowV9qR6l+GrJh0+ cVT+vyo6Fdh3+0mhKLxtshx6f4yG7a5oSGwWWgL/2fn+9Z56W2pY8oVYd g==; X-IronPort-AV: E=Sophos;i="6.01,255,1684825200"; d="scan'208";a="228053999" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa5.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 04 Aug 2023 07:28:35 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21; Fri, 4 Aug 2023 07:28:34 -0700 Received: from marius-VM.mshome.net (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.2507.21 via Frontend Transport; Fri, 4 Aug 2023 07:28:31 -0700 From: To: , , CC: , , , , , Subject: [PATCH v3 0/2] Adding support for Microchip MCP3564 ADC family Date: Fri, 4 Aug 2023 17:28:18 +0300 Message-ID: <20230804142820.89593-1-marius.cristea@microchip.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Marius Cristea Adding support for Microchip family of 153.6 ksps, Low-Noise 16/24-Bit Delta-Sigma ADCs with an SPI interface. This driver covers the following part numbers: - MCP3561, MCP3562, MCP3564, MCP3561R, MCP3562R, MCP3564R, - MCP3461, MCP3462, MCP3464, MCP3461R, MCP3462R and MCP3464R. Differences related to previous patch: v3: - fix review comments: - fix and update the device tree bindings - enable "auto_zeroing_ref_enable" attribute only when internal reference is used - remove unused headers - fix comments (kernel-docs) - remove scan_type - replace "extend_name" with read_label - print label for each channel (label could be added into the dt) - add comment to explain the maximum channels numbers - add protection around critical region - fallback compatible in device tree to deal with some newer part number - Open questions: - whether or not to add a spi-mux type of thing to deal with the part number address in case there are multiple devices connected to the same chip select. - discussion related to the "custom property". Last time around a consensus wasn't reached. v2: - fix review comments: - change the device tree bindings - change the ADC channel creation (starting from DT) - use defines, masks and FIELD_PREP() instead of hardcoded values - mode the PGA from Hardware Gain to scale - add a current output channel from burnout current - fix coding style issues - use self-explanatory naming to drop the comment - renumbered the versioning (start with v1 instead of v0) v1: - first version committed to review Marius Cristea (2): dt-bindings: iio: adc: adding MCP3564 ADC iio: adc: adding support for MCP3564 ADC .../ABI/testing/sysfs-bus-iio-adc-mcp3564 | 53 + .../bindings/iio/adc/microchip,mcp3564.yaml | 200 +++ MAINTAINERS | 7 + drivers/iio/adc/Kconfig | 13 + drivers/iio/adc/Makefile | 1 + drivers/iio/adc/mcp3564.c | 1541 +++++++++++++++++ 6 files changed, 1815 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-adc-mcp3564 create mode 100644 Documentation/devicetree/bindings/iio/adc/microchip,mcp3564.yaml create mode 100644 drivers/iio/adc/mcp3564.c base-commit: 9e66fb52449538406cea43e9f3889c391350e76e