From patchwork Tue Aug 24 11:54:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eugen Hristev X-Patchwork-Id: 12454867 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C489AC4338F for ; Tue, 24 Aug 2021 11:55:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC8EB61246 for ; Tue, 24 Aug 2021 11:55:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236871AbhHXL4O (ORCPT ); Tue, 24 Aug 2021 07:56:14 -0400 Received: from esa.microchip.iphmx.com ([68.232.153.233]:20919 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236650AbhHXL4O (ORCPT ); Tue, 24 Aug 2021 07:56:14 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1629806131; x=1661342131; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=nvQXMiaPy2VuNQO50RLteRfILBr98vNnCM+YLfLiMik=; b=GXAI3+YUqRs7Sndc+mBBMy3orUyeGQEz9ik/h1vwaCazN9FgWcSxiMj1 DPrG07NjYRqmiHfv4AxdfO2e6SMg+vd6ZDxoe4eTTQVVl7sucl63QMFoK AvdaaStsUoPQbKZD9nw+GhonlZ04wBcpYxBeAzPiTfqAGBpIiV4QrIgSA Vmj5z+eDPn/RcKFQsGaRqajg1MYXR5/Q4Z9IzY01uFdkK76KQMu60pZ3L eYz+GbZ+WkxeS8VmEeZcTn2O9zMNwyxXn5TdCy2hFzk5Y8q63919P2jhF C3AbjWJ/6Z6IZlMManjoOZvORmuJcNlBGytJlBsSjEDMBh3+Wf4kIi+kX Q==; IronPort-SDR: 6nPG1Al6NEDaXSpPdGdoVRRm6Hi4pWaBvvs6si5FpIn+sJSk/P6n4jbLO1f2vgB4Edld59Va2K 3LAgxeMLWOw/huylvtwDj8zSVrPfPqWTiZSSEdXv65nGffvxP0M7DSaPfSDa7lDPsyKVzfZZaF 4pGLEkzzeYrORjjwTx5zgbEHQquYFEW4c+t/4y/eCXmwx6LzIY0Riq+eboTIjqkK8eNcu+Neto bj071yJsx50L34yivs1QsdYqbuqH9SmjnWBsPyanNgSGO3RkO1Ltyzvg0QuFkhSApEgrZNHxai JWtd9X7OFfQOW2j2sWwWN/aV X-IronPort-AV: E=Sophos;i="5.84,347,1620716400"; d="scan'208";a="133408028" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa5.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 24 Aug 2021 04:55:30 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.14; Tue, 24 Aug 2021 04:55:29 -0700 Received: from ROB-ULT-M18282.microchip.com (10.10.115.15) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2176.14 via Frontend Transport; Tue, 24 Aug 2021 04:55:18 -0700 From: Eugen Hristev To: , , , CC: , , , , Eugen Hristev Subject: [PATCH v2 02/10] iio: adc: at91-sama5d2_adc: initialize hardware after clock is started Date: Tue, 24 Aug 2021 14:54:33 +0300 Message-ID: <20210824115441.681253-3-eugen.hristev@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210824115441.681253-1-eugen.hristev@microchip.com> References: <20210824115441.681253-1-eugen.hristev@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org The hw_init hardware init call must happen after the clock is prepared and enabled. Otherwise, writing to the registers might lead to a block or external abort. Signed-off-by: Eugen Hristev --- drivers/iio/adc/at91-sama5d2_adc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c index ea5ca163d879..1f4d461c2c18 100644 --- a/drivers/iio/adc/at91-sama5d2_adc.c +++ b/drivers/iio/adc/at91-sama5d2_adc.c @@ -1833,12 +1833,12 @@ static int at91_adc_probe(struct platform_device *pdev) goto vref_disable; } - at91_adc_hw_init(indio_dev); - ret = clk_prepare_enable(st->per_clk); if (ret) goto vref_disable; + at91_adc_hw_init(indio_dev); + platform_set_drvdata(pdev, indio_dev); ret = at91_adc_buffer_and_trigger_init(&pdev->dev, indio_dev);