From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Ripard Subject: Re: [PATCH 4/5] ARM: dts: sun8i: Add pwm-backlight device for A23/A33 Q8 format tablets Date: Tue, 22 Sep 2015 16:44:01 +0200 Message-ID: <20150922144401.GE4684@lukather> References: <1442752251-20744-1-git-send-email-hdegoede@redhat.com> <1442752251-20744-5-git-send-email-hdegoede@redhat.com> Reply-To: maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="zDvWSDb6AezIY5Za" Return-path: Content-Disposition: inline In-Reply-To: <1442752251-20744-5-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: Hans de Goede Cc: Chen-Yu Tsai , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree , linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org List-Id: devicetree@vger.kernel.org --zDvWSDb6AezIY5Za Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline On Sun, Sep 20, 2015 at 08:30:50AM -0400, Hans de Goede wrote: > From: Chen-Yu Tsai > > The LCD backlight on the A23/A33 Q8 format tablets is enabled > with a GPIO controlled regulator, and brightness controlled with > the SoC's PWM controller. > > The backlight is powered from the AXP223 PMIC's DC1SW output, > which is not supported yet. A proper bootloader is required > to enable it. > > The brightness levels are arbitrary. The FEX files do not have > such information. As such, actual brightness levels may differ > from device to device. > > Signed-off-by: Chen-Yu Tsai > Signed-off-by: Hans de Goede Applied, thanks! Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com --zDvWSDb6AezIY5Za--