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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 7AB4BC43331 for ; Tue, 24 Mar 2020 13:18:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4EF3F208E4 for ; Tue, 24 Mar 2020 13:18:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585055913; bh=8mS+FAB8IVF5c9q/iWbsjfm8yNBggi4EvZnRV6LkbJU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Q8l/lSoZ9ABezEO5SVNMYXCIghcQzJ9dupsIFba6OHcuhoNEFYe+Hjq0NjCwo//R7 JxZ7/sV29P1U0ZYORviVAJlJyHi1PU34Qv+Syn+w9cW8xlS0rfDKMrxpRIlqjN0Kaj l48CToK8XpnB9MhOl6zIP2H6grYkCw5DynS88JGI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728186AbgCXNSb (ORCPT ); Tue, 24 Mar 2020 09:18:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:38662 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727829AbgCXNS1 (ORCPT ); Tue, 24 Mar 2020 09:18:27 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 BCFCF208E4; Tue, 24 Mar 2020 13:18:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585055907; bh=8mS+FAB8IVF5c9q/iWbsjfm8yNBggi4EvZnRV6LkbJU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aUZtvJoPV7ARIt/iNew4Ii8nc0TwG2BjjU3hsuI3k3FhEsZm6AR2FpUpcTyotOUeA xKXZjyShgbrXtRoun9DYqaS/hb3SOo+RdKxcpCIaAULqSfKhJo0OBhzn1zfkSSQPNh bsUp4aiIsY54JiQxraSeRBZrje18zNlMu4bK9rNM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Guido=20G=C3=BCnther?= , Tomas Novotny , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 5.4 064/102] iio: light: vcnl4000: update sampling periods for vcnl4040 Date: Tue, 24 Mar 2020 14:10:56 +0100 Message-Id: <20200324130813.127835136@linuxfoundation.org> X-Mailer: git-send-email 2.25.2 In-Reply-To: <20200324130806.544601211@linuxfoundation.org> References: <20200324130806.544601211@linuxfoundation.org> User-Agent: quilt/0.66 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 From: Tomas Novotny commit 2ca5a8792d617b4035aacd0a8be527f667fbf912 upstream. Vishay has published a new version of "Designing the VCNL4200 Into an Application" application note in October 2019. The new version specifies that there is +-20% of part to part tolerance. Although the application note is related to vcnl4200, according to support the vcnl4040's "ASIC is quite similar to that one for the VCNL4200". So update the sampling periods (and comment), including the correct sampling period for proximity. Both sampling periods are lower. Users relying on the blocking behaviour of reading will get proximity measurements much earlier. Fixes: 5a441aade5b3 ("iio: light: vcnl4000 add support for the VCNL4040 proximity and light sensor") Reviewed-by: Guido Günther Tested-by: Guido Günther Signed-off-by: Tomas Novotny Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/light/vcnl4000.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) --- a/drivers/iio/light/vcnl4000.c +++ b/drivers/iio/light/vcnl4000.c @@ -174,9 +174,10 @@ static int vcnl4200_init(struct vcnl4000 data->al_scale = 24000; break; case VCNL4040_PROD_ID: - /* Integration time is 80ms, add 10ms. */ - data->vcnl4200_al.sampling_rate = ktime_set(0, 100000 * 1000); - data->vcnl4200_ps.sampling_rate = ktime_set(0, 100000 * 1000); + /* Default wait time is 80ms, add 20% tolerance. */ + data->vcnl4200_al.sampling_rate = ktime_set(0, 96000 * 1000); + /* Default wait time is 5ms, add 20% tolerance. */ + data->vcnl4200_ps.sampling_rate = ktime_set(0, 6000 * 1000); data->al_scale = 120000; break; }