From patchwork Thu Jun 9 08:31:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu Beznea X-Patchwork-Id: 12874999 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D5ECCC433EF for ; Thu, 9 Jun 2022 08:31:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=/D+8lG5uwdXtX9g4LZX7dF4Hf026Tr5/YskcCFSZFOs=; b=Yz209ZkYcbBLYy 8bHAvEoe/ZqWxaLc4CEkz9DJuHhXuRBWq/fUzA2x/n1d6dPpSsNQe+oAa1eHKa50ELYoXxtCsw6RX Yw8gSV1B0LtdbiMcAVSn0NojqSbjJkS1M+AwvMtf4fb9n7J8W+Jl7wIzmDEt8ZEuiBt4WsdXR7mhx TMN0TSf+PifIyMcVCbppWaJ5GIsLqyXxjOXqYTWwi5fwQ+jrGAezs3DUiATHcRVw8k8bVzZw/Q3qn P/GuFi/3+tHmQ3CgPzH+EhQUhLUMWY1/pfxJL5S6pIqXuBG1EZKp5ZaFMXZJgN0tH80PFSKsFZj2r rXfttmwCWiaW0aXWjaQw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nzDYJ-000FJB-78; Thu, 09 Jun 2022 08:30:03 +0000 Received: from esa.microchip.iphmx.com ([68.232.153.233]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nzDYC-000FG5-Be for linux-arm-kernel@lists.infradead.org; Thu, 09 Jun 2022 08:29:58 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1654763396; x=1686299396; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=1vSCdy4AX87UxHEd7W0RPqZe/n4JHEihhwn5uhx7GEM=; b=dNNfTZDf/xRBQPhEAZKUFNRDj680yTu9qdYBLjLIbcRUyNZEU+EZpPfu G9aHwArpQGpDbQHPpwekKEPoTLGLujPhW3KJSGHJXoCRE0DeLg/TiMdOj QWUM6Casg7fVLsMDcTglgi08YWNuzAtIl2DcA7LyFpgERYEAwXaklV10W jqfZSaUzYsEoxaIRm9dBWWYs9JGA0dSgQkPSpEE0Oi/lL8tpfiENwtLPi 56+7mhrB+q5edzmJwm3m5tyE3ACppKnSJN+3J0neEK5qXYmubxeassCdo Cwe5IP9VDv/qh1WwgZk1r3kUWB9/shv1Zm2oVCH9gSW8jURi8L2HzRKbJ Q==; X-IronPort-AV: E=Sophos;i="5.91,287,1647327600"; d="scan'208";a="167722478" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa3.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 09 Jun 2022 01:29:52 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Thu, 9 Jun 2022 01:29:52 -0700 Received: from localhost.localdomain (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Thu, 9 Jun 2022 01:29:48 -0700 From: Claudiu Beznea To: , , , , , , , CC: , , , , Claudiu Beznea Subject: [PATCH 00/16] iio: adc: at91-sama5d2_adc: add support for temperature sensor Date: Thu, 9 Jun 2022 11:31:57 +0300 Message-ID: <20220609083213.1795019-1-claudiu.beznea@microchip.com> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220609_012956_451360_FB787087 X-CRM114-Status: UNSURE ( 8.66 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, The following series add support for temperature sensor available on SAMA7G5. Temperature sensor available on SAMA7G5 provides 2 outputs VTEMP and VBG. VTEMP is proportional to the absolute temperature voltage and VBG is a quasi-temperature independent voltage. Both are necessary in computing the temperature (for better accuracy). Also, for better accuracy the following settings were imposed when measusing the temperature: oversampling rate of 256, sampling frequency of 10MHz, a startup time of 512 ticks, MR.tracktim=0xf, EMR.trackx=0x3. For computing the temperature measured by ADC calibration data is necessary. This is provided via OTP memory available on SAMA7G5. Patches 1/16-3/16 provides some fixes. Patches 3/16-12/16 prepares for the addition of temperature sensor support. Patch 13/16 adds the temperature sensor support. Along with temperature sensor support I took the chance and added runtime PM support in this series, too (handled in patch 15/16). The rest of patches in this series are minor cleanups. Thank you, Claudiu Beznea Claudiu Beznea (16): iio: adc: at91-sama5d2_adc: fix AT91_SAMA5D2_MR_TRACKTIM_MAX iio: adc: at91-sama5d2_adc: lock around oversampling and sample freq iio: adc: at91-sama5d2_adc: exit from write_raw() when buffers are enabled iio: adc: at91-sama5d2_adc: handle different EMR.OSR for different hw versions iio: adc: at91-sama5d2_adc: adjust osr based on specific platform data iio: adc: at91-sama5d2_adc: add 64 and 256 oversampling ratio iio: adc: at91-sama5d2_adc: simplify the code in at91_adc_read_info_raw() iio: adc: at91-sama5d2_adc: move oversampling storage in its function iio: adc: at91-sama5d2_adc: update trackx on emr iio: adc: at91-sama5d2_adc: add startup and tracktim as parameter for at91_adc_setup_samp_freq() iio: adc: at91-sama5d2_adc: add locking parameter to at91_adc_read_info_raw() dt-bindings: iio: adc: at91-sama5d2_adc: add id for temperature channel iio: adc: at91-sama5d2_adc: add support for temperature sensor iio: adc: at91-sama5d2_adc: add empty line after functions iio: adc: at91-sama5d2_adc: add runtime pm support iio: adc: at91-sama5d2_adc: use pm_ptr() drivers/iio/adc/at91-sama5d2_adc.c | 633 +++++++++++++++--- .../dt-bindings/iio/adc/at91-sama5d2_adc.h | 3 + 2 files changed, 548 insertions(+), 88 deletions(-)