From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laxman Dewangan Subject: Re: [PATCH V2 1/2] pinctrl: tegra: Add DT binding for io pads control Date: Mon, 21 Nov 2016 14:46:29 +0530 Message-ID: <5832BB6D.6090305@nvidia.com> References: <1478696782-11657-1-git-send-email-ldewangan@nvidia.com> <1478696782-11657-2-git-send-email-ldewangan@nvidia.com> <4be6f5f3-6884-7e4e-049c-29a1f8ca1fcb@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from hqemgate15.nvidia.com ([216.228.121.64]:10077 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751437AbcKUJdL (ORCPT ); Mon, 21 Nov 2016 04:33:11 -0500 In-Reply-To: <4be6f5f3-6884-7e4e-049c-29a1f8ca1fcb@nvidia.com> Sender: linux-gpio-owner@vger.kernel.org List-Id: linux-gpio@vger.kernel.org To: Jon Hunter , linus.walleij@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, swarren@wwwdotorg.org, thierry.reding@gmail.com Cc: gnurou@gmail.com, yamada.masahiro@socionext.com, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org On Wednesday 16 November 2016 12:18 AM, Jon Hunter wrote: > On 09/11/16 13:06, Laxman Dewangan wrote: >> +NVIDIA Tegra124 and later SoCs support the multi-voltage level and >> +low power state of some of its IO pads. When IO interface are not >> +used then IO pads can be configure in low power state to reduce >> +the power from that IO pads. The IO pads can work in the voltage >> +of the 1.8V and 3.3V of IO voltage from power rail sources. > The last sentence is a bit unclear and does not sound correct. I am not > sure if you are missing the word 'range' somewhere or if you are trying > to say it must be either 1.8V or 3.3V. Looks like you have the same > sentence on the changelog too. The IO pads are designed to work in two different voltage rail 1.8V (nominal) and 3.3V (nominal) for interfacing. However, the tolerances of the IO pads are: 1.8 V nominal is (1.62V, 1.98V) 3.3 V nominal is (2.97V,3.63V) From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753502AbcKUJdN (ORCPT ); Mon, 21 Nov 2016 04:33:13 -0500 Received: from hqemgate15.nvidia.com ([216.228.121.64]:10077 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751437AbcKUJdL (ORCPT ); Mon, 21 Nov 2016 04:33:11 -0500 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Sun, 20 Nov 2016 13:31:52 -0800 Message-ID: <5832BB6D.6090305@nvidia.com> Date: Mon, 21 Nov 2016 14:46:29 +0530 From: Laxman Dewangan User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: Jon Hunter , , , , , CC: , , , , , Subject: Re: [PATCH V2 1/2] pinctrl: tegra: Add DT binding for io pads control References: <1478696782-11657-1-git-send-email-ldewangan@nvidia.com> <1478696782-11657-2-git-send-email-ldewangan@nvidia.com> <4be6f5f3-6884-7e4e-049c-29a1f8ca1fcb@nvidia.com> In-Reply-To: <4be6f5f3-6884-7e4e-049c-29a1f8ca1fcb@nvidia.com> X-Originating-IP: [10.19.65.30] X-ClientProxiedBy: DRHKMAIL103.nvidia.com (10.25.59.17) To bgmail102.nvidia.com (10.25.59.11) Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 16 November 2016 12:18 AM, Jon Hunter wrote: > On 09/11/16 13:06, Laxman Dewangan wrote: >> +NVIDIA Tegra124 and later SoCs support the multi-voltage level and >> +low power state of some of its IO pads. When IO interface are not >> +used then IO pads can be configure in low power state to reduce >> +the power from that IO pads. The IO pads can work in the voltage >> +of the 1.8V and 3.3V of IO voltage from power rail sources. > The last sentence is a bit unclear and does not sound correct. I am not > sure if you are missing the word 'range' somewhere or if you are trying > to say it must be either 1.8V or 3.3V. Looks like you have the same > sentence on the changelog too. The IO pads are designed to work in two different voltage rail 1.8V (nominal) and 3.3V (nominal) for interfacing. However, the tolerances of the IO pads are: 1.8 V nominal is (1.62V, 1.98V) 3.3 V nominal is (2.97V,3.63V)