From patchwork Sat Sep 6 09:03:15 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikko Perttunen X-Patchwork-Id: 4857181 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id F14DC9F32F for ; Sat, 6 Sep 2014 09:07:00 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2C5D320142 for ; Sat, 6 Sep 2014 09:07:00 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5E81320138 for ; Sat, 6 Sep 2014 09:06:59 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XQBvO-0001bn-J9; Sat, 06 Sep 2014 09:04:50 +0000 Received: from mx1.kapsi.fi ([2001:1bc8:1004::1:25] helo=mail.kapsi.fi) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XQBvL-0001a8-Pf for linux-arm-kernel@lists.infradead.org; Sat, 06 Sep 2014 09:04:48 +0000 Received: from [2001:708:30:12d0:beee:7bff:fe5b:f272] (helo=katsura.kyla.fi) by mail.kapsi.fi with esmtpsa (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.72) (envelope-from ) id 1XQBuv-0008CU-Ul; Sat, 06 Sep 2014 12:04:21 +0300 From: Mikko Perttunen To: swarren@wwwdotorg.org, thierry.reding@gmail.com Subject: [PATCH v4 1/5] of: Add descriptions of thermtrip properties to Tegra PMC bindings Date: Sat, 6 Sep 2014 12:03:15 +0300 Message-Id: <1409994195-24559-1-git-send-email-cyndis@kapsi.fi> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1409993685-21911-2-git-send-email-cyndis@kapsi.fi> References: <1409993685-21911-2-git-send-email-cyndis@kapsi.fi> X-SA-Exim-Connect-IP: 2001:708:30:12d0:beee:7bff:fe5b:f272 X-SA-Exim-Mail-From: cyndis@kapsi.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140906_020448_013443_C5F93905 X-CRM114-Status: UNSURE ( 9.29 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.7 (-) Cc: linux-tegra@vger.kernel.org, wni@nvidia.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Mikko Perttunen X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-3.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Mikko Perttunen Hardware-triggered thermal reset requires configuring the I2C reset procedure. This configuration is read from the device tree, so document the relevant properties in the binding documentation. Signed-off-by: Mikko Perttunen Reviewed-by: Wei Ni Tested-by: Wei Ni --- v4: - update example too *facepalm* .../bindings/arm/tegra/nvidia,tegra20-pmc.txt | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt index 68ac65f..dc13fb0 100644 --- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt @@ -47,6 +47,21 @@ Required properties when nvidia,suspend-mode=<0>: sleep mode, the warm boot code will restore some PLLs, clocks and then bring up CPU0 for resuming the system. +Hardware-triggered thermal reset: +On Tegra30, Tegra114 and Tegra124, if the 'i2c-thermtrip' subnode exists, +hardware-triggered thermal reset will be enabled. + +Required properties for hardware-triggered thermal reset (inside 'i2c-thermtrip'): +- nvidia,i2c-bus : Phandle to I2C bus containing the PMU +- nvidia,bus-addr : Bus address of the PMU on the I2C bus +- nvidia,reg-addr : I2C register address to write poweroff command to +- nvidia,reg-data : Poweroff command to write to PMU + +Optional properties for hardware-triggered thermal reset (inside 'i2c-thermtrip'): +- nvidia,pinmux-id : Pinmux used by the hardware when issuing poweroff command. + Defaults to 0. Valid values are described in section 12.5.2 + "Pinmux Support" of the Tegra4 Technical Reference Manual. + Example: / SoC dts including file @@ -69,6 +84,15 @@ pmc@7000f400 { / Tegra board dts file { ... + pmc@7000f400 { + i2c-thermtrip { + nvidia,i2c-bus = <&pmic_bus>; + nvidia,bus-addr = <0x40>; + nvidia,reg-addr = <0x36>; + nvidia,reg-data = <0x2>; + }; + }; + ... clocks { compatible = "simple-bus"; #address-cells = <1>;