From patchwork Sat Feb 10 01:36:36 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcel Ziswiler X-Patchwork-Id: 871616 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3zdZSd2nCNz9rxj for ; Sat, 10 Feb 2018 12:42:57 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752422AbeBJBmo (ORCPT ); Fri, 9 Feb 2018 20:42:44 -0500 Received: from mout.perfora.net ([74.208.4.197]:39117 "EHLO mout.perfora.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751859AbeBJBmj (ORCPT ); Fri, 9 Feb 2018 20:42:39 -0500 Received: from localhost.localdomain.ziswiler.net ([178.38.65.171]) by mrelay.perfora.net (mreueus003 [74.208.5.2]) with ESMTPA (Nemesis) id 0Lc9rP-1fA43X1ymT-00jZia; Sat, 10 Feb 2018 02:36:46 +0100 From: Marcel Ziswiler To: linux-tegra@vger.kernel.org, devicetree@vger.kernel.org Cc: Marcel Ziswiler , Thierry Reding , Jonathan Hunter , linux-kernel@vger.kernel.org, Rob Herring , Mark Rutland , Russell King , linux-arm-kernel@lists.infradead.org Subject: [PATCH 1/3] apalis_t30/tk1, colibri_t20/t30: fix i2c bus frequencies Date: Sat, 10 Feb 2018 02:36:36 +0100 Message-Id: <20180210013638.28164-2-marcel@ziswiler.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180210013638.28164-1-marcel@ziswiler.com> References: <20180210013638.28164-1-marcel@ziswiler.com> X-Provags-ID: V03:K0:bGwqYmaKXCUw3VsNqeg6aR98RaLL3pz05Cp5vSA/MdvB4JK/Y5R IaaYVvM4NYSHUhs9I6xRGGRJgQp031kUPGINb126+3OWz2PP+IXa7bRC4xhtY8kNB24icjb 2bSZ9cT2oRT8hASl/QPQS7Hs0V7r00cecQlJKQbBB1FUQDHArTCQZEQJN7WatGvy2G6oQtu /7fuBw3TboRneDMGj0Xvw== X-UI-Out-Filterresults: notjunk:1; V01:K0:owWtZF+cB6k=:5x4Mj0KBIZd06NyoAubYPr BDAsV1bIQKV9e2ajVboPB1twa7yZSn5zqVk2FpJDo9Ta9KzaXMehEKc+b8RrSPkJMtPaGUvDh fVSnFsSFIMlsPW3rSNXWu8SZPMKohSa7VgxyXJLPzsAjVa8PVRpWQc+QPdYiFNZh/yP1utrlO RbcpiDqIwFH60JriHK5pa8TsEFh1G0J+2AZTtnvkRHeLGIJEJZvpmYhZL3FGxhDcPvCfTzbED p32CM4SfyiXVTkQt6Bga47KFl8XjrFSARxdk3MxaMbnnwEzFBaYEvSk3InhY49WJrFjRqkKa7 VCMyozPiN+VlHQkwoHS5daxGw7EqReKrjzXHMdW+FYO6mVGmZeX3F/xuuolLmu5T7NfJHQWUP R1RFwWcvD3jpTuj3a1KkqvvwVAaIZefrC0dBFs0CJwQ5f1CSqxrSKUBPfdRQHg796aVf29+qp dus7qFgQPAtxDQdqHAdeuTyN2osD5RtZ+EXoMRG2hi9hRzlWPdWLvSkns/DEGH7MdRGKszGp+ mf0mUStTRWuFWeVCfVoMfSr92xQCD/RsKTFjbYM4pu6jiqflj6xrNipG3NynEZb66B+zA6Fsb gZtqF6De7fqRgCTRaALhY9i9+akTz6HURwf/yYe8/omaXShGvDKS2Chb57FmF32x20ol9VZ8k /3EkPy0jLqTEGcOSQdMhpso/D97WTMsXg58v0EEEqJul/01SmzvZDgsZi5ylvUGyEXCUZNmVA elQjFTafM4hxOvrztQEbBYJbSo+ueLgG76IzWw== Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org From: Marcel Ziswiler Use a faster speed of 400 kbit/s for regular I2C busses. Use a slower speed of 10 kbit/s for DDC/EDID to improve reliability. Use a slower speed of 100 kbit/s for power I2C to be within specs of the LM95245 temperature sensor. While at it further annotate I2C pin usage. Signed-off-by: Marcel Ziswiler --- arch/arm/boot/dts/tegra124-apalis-eval.dts | 5 ++--- arch/arm/boot/dts/tegra124-apalis.dtsi | 2 +- arch/arm/boot/dts/tegra20-colibri-512.dtsi | 16 +++++++++++----- arch/arm/boot/dts/tegra30-apalis-eval.dts | 2 +- arch/arm/boot/dts/tegra30-apalis.dtsi | 2 +- arch/arm/boot/dts/tegra30-colibri-eval-v3.dts | 2 +- arch/arm/boot/dts/tegra30-colibri.dtsi | 2 +- 7 files changed, 18 insertions(+), 13 deletions(-) diff --git a/arch/arm/boot/dts/tegra124-apalis-eval.dts b/arch/arm/boot/dts/tegra124-apalis-eval.dts index ecffcd115fa7..66b6c45ee865 100644 --- a/arch/arm/boot/dts/tegra124-apalis-eval.dts +++ b/arch/arm/boot/dts/tegra124-apalis-eval.dts @@ -105,7 +105,7 @@ */ i2c@7000c000 { status = "okay"; - clock-frequency = <100000>; + clock-frequency = <400000>; pcie-switch@58 { compatible = "plx,pex8605"; @@ -124,7 +124,6 @@ */ hdmi_ddc: i2c@7000c400 { status = "okay"; - clock-frequency = <100000>; }; /* @@ -133,7 +132,7 @@ */ i2c@7000c500 { status = "okay"; - clock-frequency = <100000>; + clock-frequency = <400000>; }; /* I2C4 (DDC): unused */ diff --git a/arch/arm/boot/dts/tegra124-apalis.dtsi b/arch/arm/boot/dts/tegra124-apalis.dtsi index 5d9b18ef5af6..7aef8928e115 100644 --- a/arch/arm/boot/dts/tegra124-apalis.dtsi +++ b/arch/arm/boot/dts/tegra124-apalis.dtsi @@ -1579,7 +1579,7 @@ }; hdmi_ddc: i2c@7000c400 { - clock-frequency = <100000>; + clock-frequency = <10000>; }; /* PWR_I2C: power I2C to audio codec, PMIC and temperature sensor */ diff --git a/arch/arm/boot/dts/tegra20-colibri-512.dtsi b/arch/arm/boot/dts/tegra20-colibri-512.dtsi index 813ae34edd6a..5c202b3e3bb1 100644 --- a/arch/arm/boot/dts/tegra20-colibri-512.dtsi +++ b/arch/arm/boot/dts/tegra20-colibri-512.dtsi @@ -213,21 +213,27 @@ GPIO_ACTIVE_HIGH>; }; + /* + * GEN1_I2C: I2C_SDA/SCL on SODIMM pin 194/196 (e.g. RTC on carrier + * board) + */ i2c@7000c000 { clock-frequency = <400000>; }; + /* DDC_SCL/SDA on X3 pin 15/16 (e.g. display EDID) */ i2c_ddc: i2c@7000c400 { - clock-frequency = <100000>; + clock-frequency = <10000>; }; - i2c@7000c500 { - clock-frequency = <400000>; - }; + /* GEN2_I2C: unused */ + /* CAM/GEN3_I2C: used as EXT_IO1/2 GPIOs on SODIMM pin 133/127 */ + + /* PWR_I2C: power I2C to PMIC and temperature sensor (On-module) */ i2c@7000d000 { status = "okay"; - clock-frequency = <400000>; + clock-frequency = <100000>; pmic: tps6586x@34 { compatible = "ti,tps6586x"; diff --git a/arch/arm/boot/dts/tegra30-apalis-eval.dts b/arch/arm/boot/dts/tegra30-apalis-eval.dts index 07b945b0391a..fdca527a2248 100644 --- a/arch/arm/boot/dts/tegra30-apalis-eval.dts +++ b/arch/arm/boot/dts/tegra30-apalis-eval.dts @@ -79,7 +79,7 @@ */ i2c@7000c000 { status = "okay"; - clock-frequency = <100000>; + clock-frequency = <400000>; pcie-switch@58 { compatible = "plx,pex8605"; diff --git a/arch/arm/boot/dts/tegra30-apalis.dtsi b/arch/arm/boot/dts/tegra30-apalis.dtsi index bfb7913c0657..676a4c4b1512 100644 --- a/arch/arm/boot/dts/tegra30-apalis.dtsi +++ b/arch/arm/boot/dts/tegra30-apalis.dtsi @@ -437,7 +437,7 @@ }; hdmiddc: i2c@7000c700 { - clock-frequency = <100000>; + clock-frequency = <10000>; }; /* diff --git a/arch/arm/boot/dts/tegra30-colibri-eval-v3.dts b/arch/arm/boot/dts/tegra30-colibri-eval-v3.dts index b307feb7c330..8c62833197e5 100644 --- a/arch/arm/boot/dts/tegra30-colibri-eval-v3.dts +++ b/arch/arm/boot/dts/tegra30-colibri-eval-v3.dts @@ -56,7 +56,7 @@ */ i2c@7000c000 { status = "okay"; - clock-frequency = <100000>; + clock-frequency = <400000>; /* M41T0M6 real time clock on carrier board */ rtc@68 { diff --git a/arch/arm/boot/dts/tegra30-colibri.dtsi b/arch/arm/boot/dts/tegra30-colibri.dtsi index 139bfa028b04..1f77273521bf 100644 --- a/arch/arm/boot/dts/tegra30-colibri.dtsi +++ b/arch/arm/boot/dts/tegra30-colibri.dtsi @@ -215,7 +215,7 @@ }; hdmiddc: i2c@7000c700 { - clock-frequency = <100000>; + clock-frequency = <10000>; }; /*