Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752312AbZIUSIP (ORCPT ); Mon, 21 Sep 2009 14:08:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752065AbZIUSIP (ORCPT ); Mon, 21 Sep 2009 14:08:15 -0400 Received: from mail-pz0-f190.google.com ([209.85.222.190]:54341 "EHLO mail-pz0-f190.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752060AbZIUSIO (ORCPT ); Mon, 21 Sep 2009 14:08:14 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; b=bNURz1kLGCP5MPq6GnrxnGMwA1p9O7ub0YLl9r7LgzO4nMBUzJb589x/Lqu96mWI3/ mfuTBWLTdTDJ5re4XUMZcnQAM7wkuVW9bkk152LDvbnNQ7+kc/57ZWyG2LBEBmFh9dmY r3dzcBO0F+FZk34c0Hzwsp0qKF1ZLv4yAg+K4= MIME-Version: 1.0 In-Reply-To: References: <1253215662-11404-1-git-send-email-getarunks@gmail.com> <771cded00909210049g6c7c8075pe4ca331184e39415@mail.gmail.com> From: Arun KS Date: Mon, 21 Sep 2009 11:07:58 -0700 Message-ID: Subject: Re: [PATCH] Adding LED1 & LED2 control for DA9034 backlight driver To: Eric Miao Cc: Haojian Zhuang , linux-kernel@vger.kernel.org, rpurdie@rpsys.net, eric.miao@marvell.com, mike@compulab.co.il Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 956 Lines: 29 On Mon, Sep 21, 2009 at 10:08 AM, Eric Miao wrote: > > > Apparently there is a bug in the hardware design on my custom board. We are > > using LED1 for backlight control. > > Thanks Haojian for clarification. > > > > Now you know that :-) > > Either let your hardware engineer change the design, or there are still > workarounds, you can control the LED1/2 through the sysfs entries. If I apply the patch which I send, backlight driver is working well through the da093x_bl.c driver. Because LED1 driver is same as the WLED driver apart from current level it can provide. WLED can provide max of 32mA but LED can only provide current <500uA. Thanks for your concern. Arun > > - eric -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/