From mboxrd@z Thu Jan 1 00:00:00 1970 From: 8001010 <8001010@gmail.com> Subject: Re: [linux-sunxi] Re: [PATCH 0/5] ARM: dts: sunxi: Add backlight node to q8 tablets Date: Mon, 11 Jan 2016 11:34:18 +0100 Message-ID: <5693852A.1060604@gmail.com> References: <1442752251-20744-1-git-send-email-hdegoede@redhat.com> <5677F7CF.3050308@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <5677F7CF.3050308@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Hans de Goede , linux-sunxi Cc: devicetree@vger.kernel.org, maxime.ripard@free-electrons.com, wens@csie.org, linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org Hans de Goede wrote: > Hi, > > On 21-12-15 11:56, Silvio Pellicano wrote: >> >> >>> Here is a slightly updated version of Chen-Yu's backlight >>> patches, also adding support for the backlight found on A13 >>> based q8 tablets. >>> >> >> If i compile your dtsi with (obviously) pwm support enable , backlight >> switch off after kernel start, >> if i disable pwm in menuconfig,it stay on, all seem correct (pwm on PB2 in >> original script.bin), >> but there is somewhere a bug in pwm or dtsi description of backlight. > > No there is not, if you enable the pwm driver you must also enable > the backlight-pwm driver / add CONFIG_BACKLIGHT_PWM=y to your .config > (and make sure it stays that way after a "make oldconfig"). > > Regards, > > Hans > Now work, but what flag i have to enable to leave 5v usb otg ON? uboot switch ON Usb Otg voltage but kernel switch off during boot (no usb devices work). Thanks