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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 6C5DFC43381 for ; Tue, 12 Mar 2019 12:26:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 356C820883 for ; Tue, 12 Mar 2019 12:26:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552393570; bh=kuPW9Zx/Jy248+lx9dlWYobPXQe02ULo9Ng/n+D4Now=; h=From:To:Cc:Subject:Date:List-ID:From; b=Wpl3nMjVp2JqHpAGWpTblZ2Z5klx/wuC3cPp+1WH8DXcU9Vfww/+MteqSbsCe5q1a tJfcfFDugjLfk4YAxQGWT94XtMbada9RGs5w7IrU690vlJK2QypJv6PiifPP2H6amM MX5VaKX51mCXDZSFvXMYngQdQ++pklyWn1Es5f6I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725887AbfCLM0J (ORCPT ); Tue, 12 Mar 2019 08:26:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:53518 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725957AbfCLM0J (ORCPT ); Tue, 12 Mar 2019 08:26:09 -0400 Received: from PC-kkoz.proceq.com (unknown [213.160.61.66]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5D13120883; Tue, 12 Mar 2019 12:26:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552393567; bh=kuPW9Zx/Jy248+lx9dlWYobPXQe02ULo9Ng/n+D4Now=; h=From:To:Cc:Subject:Date:From; b=y3aB8DXw/kUF5+0MBTX3lIc2JkKkzDUNeidyADT9Z1PJr3W7ipa+cf1yczJ5rSi76 7hqsLNB/eHKvrpwlVwo604Gu9CqLg+O65iafJNKfxWvCVgwS2LSaINBclb7bjx0P/p 0J8kFJ6RnWYYXGILWw9+/fO0MPFk/O3b7QN9+MaM= From: Krzysztof Kozlowski To: stable@vger.kernel.org Cc: Krzysztof Kozlowski Subject: [PATCH stable v4.9+] ARM: dts: exynos: Do not ignore real-world fuse values for thermal zone 0 on Exynos5420 Date: Tue, 12 Mar 2019 13:26:03 +0100 Message-Id: <1552393563-3337-1-git-send-email-krzk@kernel.org> X-Mailer: git-send-email 2.7.4 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org commit 28928a3ce142b2e4e5a7a0f067cefb41a3d2c3f9 upstream. In Odroid XU3 Lite board, the temperature levels reported for thermal zone 0 were weird. In warm room: /sys/class/thermal/thermal_zone0/temp:32000 /sys/class/thermal/thermal_zone1/temp:51000 /sys/class/thermal/thermal_zone2/temp:55000 /sys/class/thermal/thermal_zone3/temp:54000 /sys/class/thermal/thermal_zone4/temp:51000 Sometimes after booting the value was even equal to ambient temperature which is highly unlikely to be a real temperature of sensor in SoC. The thermal sensor's calibration (trimming) is based on fused values. In case of the board above, the fused values are: 35, 52, 43, 58 and 43 (corresponding to each TMU device). However driver defined a minimum value for fused data as 40 and for smaller values it was using a hard-coded 55 instead. This lead to mapping data from sensor to wrong temperatures for thermal zone 0. Various vendor 3.10 trees (Hardkernel's based on Samsung LSI, Artik 10) do not impose any limits on fused values. Since we do not have any knowledge about these limits, use 0 as a minimum accepted fused value. This should essentially allow accepting any reasonable fused value thus behaving like vendor driver. The exynos5420-tmu-sensor-conf.dtsi is copied directly from existing exynos4412 with one change - the samsung,tmu_min_efuse_value. Signed-off-by: Krzysztof Kozlowski Acked-by: Bartlomiej Zolnierkiewicz Acked-by: Eduardo Valentin Reviewed-by: Javier Martinez Canillas Tested-by: Javier Martinez Canillas Reviewed-by: Anand Moon Tested-by: Anand Moon --- arch/arm/boot/dts/exynos5420-tmu-sensor-conf.dtsi | 25 +++++++++++++++++++++++ arch/arm/boot/dts/exynos5420.dtsi | 10 ++++----- 2 files changed, 30 insertions(+), 5 deletions(-) create mode 100644 arch/arm/boot/dts/exynos5420-tmu-sensor-conf.dtsi diff --git a/arch/arm/boot/dts/exynos5420-tmu-sensor-conf.dtsi b/arch/arm/boot/dts/exynos5420-tmu-sensor-conf.dtsi new file mode 100644 index 000000000000..c8771c660550 --- /dev/null +++ b/arch/arm/boot/dts/exynos5420-tmu-sensor-conf.dtsi @@ -0,0 +1,25 @@ +/* + * Device tree sources for Exynos5420 TMU sensor configuration + * + * Copyright (c) 2014 Lukasz Majewski + * Copyright (c) 2017 Krzysztof Kozlowski + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include + +#thermal-sensor-cells = <0>; +samsung,tmu_gain = <8>; +samsung,tmu_reference_voltage = <16>; +samsung,tmu_noise_cancel_mode = <4>; +samsung,tmu_efuse_value = <55>; +samsung,tmu_min_efuse_value = <0>; +samsung,tmu_max_efuse_value = <100>; +samsung,tmu_first_point_trim = <25>; +samsung,tmu_second_point_trim = <85>; +samsung,tmu_default_temp_offset = <50>; +samsung,tmu_cal_type = ; diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi index 00c4cfa54839..52f3d911f67f 100644 --- a/arch/arm/boot/dts/exynos5420.dtsi +++ b/arch/arm/boot/dts/exynos5420.dtsi @@ -694,7 +694,7 @@ interrupts = <0 65 0>; clocks = <&clock CLK_TMU>; clock-names = "tmu_apbif"; - #include "exynos4412-tmu-sensor-conf.dtsi" + #include "exynos5420-tmu-sensor-conf.dtsi" }; tmu_cpu1: tmu@10064000 { @@ -703,7 +703,7 @@ interrupts = <0 183 0>; clocks = <&clock CLK_TMU>; clock-names = "tmu_apbif"; - #include "exynos4412-tmu-sensor-conf.dtsi" + #include "exynos5420-tmu-sensor-conf.dtsi" }; tmu_cpu2: tmu@10068000 { @@ -712,7 +712,7 @@ interrupts = <0 184 0>; clocks = <&clock CLK_TMU>, <&clock CLK_TMU>; clock-names = "tmu_apbif", "tmu_triminfo_apbif"; - #include "exynos4412-tmu-sensor-conf.dtsi" + #include "exynos5420-tmu-sensor-conf.dtsi" }; tmu_cpu3: tmu@1006c000 { @@ -721,7 +721,7 @@ interrupts = <0 185 0>; clocks = <&clock CLK_TMU>, <&clock CLK_TMU_GPU>; clock-names = "tmu_apbif", "tmu_triminfo_apbif"; - #include "exynos4412-tmu-sensor-conf.dtsi" + #include "exynos5420-tmu-sensor-conf.dtsi" }; tmu_gpu: tmu@100a0000 { @@ -730,7 +730,7 @@ interrupts = <0 215 0>; clocks = <&clock CLK_TMU_GPU>, <&clock CLK_TMU>; clock-names = "tmu_apbif", "tmu_triminfo_apbif"; - #include "exynos4412-tmu-sensor-conf.dtsi" + #include "exynos5420-tmu-sensor-conf.dtsi" }; sysmmu_g2dr: sysmmu@0x10A60000 { -- 2.7.4