From patchwork Wed Jan 7 05:49:38 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vignesh Raghavendra X-Patchwork-Id: 5582341 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id DDF44BF6C3 for ; Wed, 7 Jan 2015 05:53:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1F0452025B for ; Wed, 7 Jan 2015 05:53:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2D9ED20254 for ; Wed, 7 Jan 2015 05:53:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752370AbbAGFwp (ORCPT ); Wed, 7 Jan 2015 00:52:45 -0500 Received: from arroyo.ext.ti.com ([192.94.94.40]:50401 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755467AbbAGFwm (ORCPT ); Wed, 7 Jan 2015 00:52:42 -0500 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id t075paOW004880; Tue, 6 Jan 2015 23:51:36 -0600 Received: from DLEE70.ent.ti.com (dlee70.ent.ti.com [157.170.170.113]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id t075paic012226; Tue, 6 Jan 2015 23:51:36 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.3.174.1; Tue, 6 Jan 2015 23:51:36 -0600 Received: from uda0132425.apr.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id t075olTT006590; Tue, 6 Jan 2015 23:51:28 -0600 From: Vignesh R To: Jonathan Cameron , Hartmut Knaack , Dmitry Torokhov , Lee Jones , Sebastian Andrzej Siewior CC: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Benoit Cousson , Tony Lindgren , Russell King , Lars-Peter Clausen , Peter Meerwald , Samuel Ortiz , Brad Griffis , Paul Gortmaker , Sanjeev Sharma , Jan Kardell , Felipe Balbi , Wolfram Sang , , , , , , , Vignesh R Subject: [PATCH v6 5/6] ARM: dts: AM335x: Make charge delay a DT parameter for TSC Date: Wed, 7 Jan 2015 11:19:38 +0530 Message-ID: <1420609779-11156-6-git-send-email-vigneshr@ti.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1420609779-11156-1-git-send-email-vigneshr@ti.com> References: <1420609779-11156-1-git-send-email-vigneshr@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_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 The charge delay value is by default 0x400. But it can be set to lower values on some boards, as long as false pen-ups are avoided. Lowering the value increases the sampling rate (though current sampling rate is sufficient for TSC operation). In some boards, the value has to be increased to avoid false pen-up events. Hence, charge delay has been made a DT parameter. Signed-off-by: Vignesh R Acked-by: Tony Lindgren --- arch/arm/boot/dts/am335x-evm.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts index 54f118c08db8..66342515df20 100644 --- a/arch/arm/boot/dts/am335x-evm.dts +++ b/arch/arm/boot/dts/am335x-evm.dts @@ -648,6 +648,7 @@ ti,x-plate-resistance = <200>; ti,coordinate-readouts = <5>; ti,wire-config = <0x00 0x11 0x22 0x33>; + ti,charge-delay = <0x400>; }; adc {