From patchwork Tue Jun 28 15:16:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu Beznea X-Patchwork-Id: 12898464 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 003F3C433EF for ; Tue, 28 Jun 2022 15:18:42 +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=fYB2o03VqTUkk/0ZhUOFnwDlIdMRaMVXEkX1LFb7tik=; b=hX4l5k23TXHb2v UAloETvGKgEHgc5jfrcXE4dPfPyxk2bNdZQ2RK++cY+PHy6ENhNE7c0xgyL6URTN/f6wdA2k2xw6K UprFgiKYlyNrsyBkpXjvQcFHRnMJ/BCtRRuLO4lFaggfm0P1B4iuCylK1K4+SRdB+ePTjhODdnwiK 0eftF9NfbZGer1evdDh6/WYzRQi+/v7RAny9TzyO4rwlJEEoaPQ2eLJ7vDKLvQl5Uoi4Jp4XTy399 kRuZNYXfq4uC7Jh5lccYVdBts/+ViH63iDufuseTVGtPZXHXst5wAln0IViqHyz4cG4qD2oEizMpF unbWZv+zEr7g2kSUuE/w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o6CyB-006r3x-DP; Tue, 28 Jun 2022 15:17:39 +0000 Received: from esa.microchip.iphmx.com ([68.232.154.123]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o6Cuz-006puw-Ok for linux-arm-kernel@lists.infradead.org; Tue, 28 Jun 2022 15:14:23 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1656429261; x=1687965261; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=wMU0LIcd6S290PqHZw/nq7NIsUSg5LahG1AgMvpc6Lg=; b=vQ+/Dyvs46BkM97IJVqrsse/hHObVv9q/pkSUzwgG6EHjRXdWyjMPwnQ hlmehBVJf0aJ/KJM0NpUUnlLB5hPS7kSb0D4eAp1ZnxahLUcHBUst+y5Y FWFEPxCLJF/gsv4e6pxWSX3BbmJSfqOCc20dKQGeokLtDjjcHeQkZAqHR zXQ7YGCbRPgxRPM8LRl/o0X81WQgYjUBRsg20oCjGlds8biglMbjmi+GD RXnE/7hYXj/8TsWPPzhFw7uTB3Ni4BRzF+6m0u7Zdur44zW/hK3t7ItpS GHAwS8axb6XtF68ePxQEReKEIatD/zP9tECNWgHw+z0ksSq/pUeQYPVpw Q==; X-IronPort-AV: E=Sophos;i="5.92,229,1650956400"; d="scan'208";a="165465211" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 28 Jun 2022 08:14:18 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) 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 15.1.2375.17; Tue, 28 Jun 2022 08:14:12 -0700 Received: from localhost.localdomain (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Tue, 28 Jun 2022 08:14:09 -0700 From: Claudiu Beznea To: , , , , , , , CC: , , , Subject: [PATCH v2 00/19] iio: adc: at91-sama5d2_adc: add support for temperature sensor Date: Tue, 28 Jun 2022 18:16:12 +0300 Message-ID: <20220628151631.3116454-1-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-20220628_081421_914172_094F4A17 X-CRM114-Status: GOOD ( 10.30 ) 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 1/19-4/19 provides some fixes. Patches 5/19-16/19 prepares for the addition of temperature sensor support. Patch 17/16 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 19/19). The rest of patches in this series are minor cleanups. Thank you, Claudiu Beznea Changes in v2: - addressed review comments - with this, new patches were intruced in this series: 2/19, 4/19, 8/19, 9,19 - runtime pm support has been adapted to work also when CONFIG_PM is not enabled - collected tags Claudiu Beznea (19): iio: adc: at91-sama5d2_adc: fix AT91_SAMA5D2_MR_TRACKTIM_MAX iio: adc: at91-sama5d2_adc: check return status for pressure and touch iio: adc: at91-sama5d2_adc: lock around oversampling and sample freq iio: adc: at91-sama5d2_adc: disable/prepare buffer on suspend/resume 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: move the check of oversampling in its function iio: adc: at91-sama5d2_adc: drop AT91_OSR_XSAMPLES defines iio: adc: at91-sama5d2_adc: add .read_avail() chan_info ops 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: 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: lock around 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 drivers/iio/adc/at91-sama5d2_adc.c | 683 +++++++++++++++--- .../dt-bindings/iio/adc/at91-sama5d2_adc.h | 3 + 2 files changed, 566 insertions(+), 120 deletions(-)