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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,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 4BC79C10F0E for ; Thu, 18 Apr 2019 16:37:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1BDCF20643 for ; Thu, 18 Apr 2019 16:37:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="gn2XTdb0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388299AbfDRQhj (ORCPT ); Thu, 18 Apr 2019 12:37:39 -0400 Received: from mail-qt1-f196.google.com ([209.85.160.196]:36477 "EHLO mail-qt1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733067AbfDRQhj (ORCPT ); Thu, 18 Apr 2019 12:37:39 -0400 Received: by mail-qt1-f196.google.com with SMTP id s15so2863098qtn.3 for ; Thu, 18 Apr 2019 09:37:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=tHbYk6MxaillgOP+/nGA7bQ7Ha1/NadZMer7j1cGAHQ=; b=gn2XTdb0f3fWM/1VnLYnesohfx1oOByRDmewVdfyylWpdChOEH+AJvkP2tXTXB28Ic bUoWPpDEdi+lEETPvp1bVdKel7/4bXSN5s95mQEfTt7pZqY6iUHbmoKAnGyIKgew/vj6 zdmdoBhUTFT0Hrvfjj0Yo1B6nmN0vTFA0V/k9c32GshwZQJaLBTlMcKSIjjvZo9uUqd4 CxbIk4zTEkVJtYS931QYMjhFwfzKPuTcnoXGKxQk3mKHx9N8qoEvvqZSqaOC1rKC5wHP 29cF0liH7v+nW0y4EqI73AtRw7WJlZTkVkEoB323iFzvE5j0V0a1iI3O9JFkDdzlvxz4 UX6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=tHbYk6MxaillgOP+/nGA7bQ7Ha1/NadZMer7j1cGAHQ=; b=szPJE0K1rclV7kT04geqlbg26BekJ3/JXjbC/TqnhywgN/UWvPJrMf5sdNnLuvp8He TBzCSkHMt3XZqsYCC2u3HvVA/NwUn0n9yrAIAINR4F4YwFaZs3WSZd2+T+YC7qNH6ONb npzjpN3YtLfUwShnR6hNBRdJ7kz/q7mElBy+vBMHInepAp/knsrRbmsv5u6Suw4ta55Q j5ic2wMyTpU/II88fzku0Xp9GrCWXL7JlNWu2OpT2rib42jBQtK7XgmuN9CeHLGMBtFz 0y0Z5MpiR7ZlgWgPnJAp3DWFAcCsCnACKhjSZGkQagIZkqvhT2j8GC3xBcF3UQcPnK3N uChw== X-Gm-Message-State: APjAAAVlxWRlgMt+IgwOZAxOHlvrlrDbiNBMPu6z7BK5Mcz0YK7UnVom v3jPccgSIUjmmyI64SKbUK8SkyNxmaSvLw== X-Google-Smtp-Source: APXvYqwIG+s8ky3gEYJPBDf3Mzac2XsInoWYNrtvBmQ2lu+x1WSa7zMK9kcjgEc9+2Qk4j9Uw2ZMpw== X-Received: by 2002:ac8:1119:: with SMTP id c25mr75139491qtj.165.1555605458295; Thu, 18 Apr 2019 09:37:38 -0700 (PDT) Received: from jfddesk.Sonatest.net (ipagstaticip-d73c7528-4de5-0861-800b-03d8b15e3869.sdsl.bell.ca. [174.94.156.236]) by smtp.gmail.com with ESMTPSA id k41sm1622394qtc.89.2019.04.18.09.37.37 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 18 Apr 2019 09:37:37 -0700 (PDT) From: Jean-Francois Dagenais To: linux-pm@vger.kernel.org Cc: daniel.lezcano@linaro.org, edubezval@gmail.com, rui.zhang@intel.com, Jean-Francois Dagenais Subject: [PATCH 1/2] thermal: generic-adc: make lookup table optional Date: Thu, 18 Apr 2019 12:37:32 -0400 Message-Id: <20190418163733.17414-1-jeff.dagenais@gmail.com> X-Mailer: git-send-email 2.11.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Certain ADC channels, such as the xilinx-ams temperature channels, give milliCelcius already when read with iio_read_channel_processed. Rather than having to provide a 1:1 dummy lookup table, simply allow to bypass the mechanism. Signed-off-by: Jean-Francois Dagenais --- drivers/thermal/thermal-generic-adc.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/thermal/thermal-generic-adc.c b/drivers/thermal/thermal-generic-adc.c index e22fc60ad36d..deb244f12de4 100644 --- a/drivers/thermal/thermal-generic-adc.c +++ b/drivers/thermal/thermal-generic-adc.c @@ -29,6 +29,9 @@ static int gadc_thermal_adc_to_temp(struct gadc_thermal_info *gti, int val) int temp, temp_hi, temp_lo, adc_hi, adc_lo; int i; + if (!gti->lookup_table) + return val; + for (i = 0; i < gti->nlookup_table; i++) { if (val >= gti->lookup_table[2 * i + 1]) break; @@ -81,9 +84,9 @@ static int gadc_thermal_read_linear_lookup_table(struct device *dev, ntable = of_property_count_elems_of_size(np, "temperature-lookup-table", sizeof(u32)); - if (ntable < 0) { - dev_err(dev, "Lookup table is not provided\n"); - return ntable; + if (ntable <= 0) { + dev_notice(dev, "no lookup table, assuming DAC channel returns milliCelcius\n"); + return 0; } if (ntable % 2) { -- 2.11.0