From mboxrd@z Thu Jan 1 00:00:00 1970 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=-6.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 4D642C43441 for ; Sun, 11 Nov 2018 22:36:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1191E208A3 for ; Sun, 11 Nov 2018 22:36:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="R8Wnj6YW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1191E208A3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391354AbeKLI0n (ORCPT ); Mon, 12 Nov 2018 03:26:43 -0500 Received: from mail.kernel.org ([198.145.29.99]:33028 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405156AbeKLIZX (ORCPT ); Mon, 12 Nov 2018 03:25:23 -0500 Received: from localhost (unknown [206.108.79.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 68AE02241E; Sun, 11 Nov 2018 22:35:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541975725; bh=wCZSQBlv0GcS4LYJkqgS9rdAyKC2rgOcRsBUTKokRsc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R8Wnj6YW56WIeOQhyr9fK5+RBOWXehORk6QUrXOepyl6Cg+sRekotSXkMsOHWGPUT da4GeZI3Y3PQuvBvU+ME0kjOCyZtAXP+tDspOFq8czTneaLSD6WVk/sMLDeVIc6QYI 9OpoHcx9RNr69zpTFr21RDYYV79RB7+uhogDyXoM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Maxime Ripard , Eugen Hristev , Ludovic Desroches , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 4.9 104/141] iio: adc: at91: fix wrong channel number in triggered buffer mode Date: Sun, 11 Nov 2018 14:26:03 -0800 Message-Id: <20181111221642.477900930@linuxfoundation.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181111221627.853046496@linuxfoundation.org> References: <20181111221627.853046496@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eugen Hristev commit aea835f2dc8a682942b859179c49ad1841a6c8b9 upstream. When channels are registered, the hardware channel number is not the actual iio channel number. This is because the driver is probed with a certain number of accessible channels. Some pins are routed and some not, depending on the description of the board in the DT. Because of that, channels 0,1,2,3 can correspond to hardware channels 2,3,4,5 for example. In the buffered triggered case, we need to do the translation accordingly. Fixed the channel number to stop reading the wrong channel. Fixes: 0e589d5fb ("ARM: AT91: IIO: Add AT91 ADC driver.") Cc: Maxime Ripard Signed-off-by: Eugen Hristev Acked-by: Ludovic Desroches Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/adc/at91_adc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/iio/adc/at91_adc.c +++ b/drivers/iio/adc/at91_adc.c @@ -247,12 +247,14 @@ static irqreturn_t at91_adc_trigger_hand struct iio_poll_func *pf = p; struct iio_dev *idev = pf->indio_dev; struct at91_adc_state *st = iio_priv(idev); + struct iio_chan_spec const *chan; int i, j = 0; for (i = 0; i < idev->masklength; i++) { if (!test_bit(i, idev->active_scan_mask)) continue; - st->buffer[j] = at91_adc_readl(st, AT91_ADC_CHAN(st, i)); + chan = idev->channels + i; + st->buffer[j] = at91_adc_readl(st, AT91_ADC_CHAN(st, chan->channel)); j++; }