From patchwork Fri Feb 21 16:55:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 11396993 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BC0C5138D for ; Fri, 21 Feb 2020 16:56:37 +0000 (UTC) Received: from web01.groups.io (web01.groups.io [66.175.222.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5DDF024656 for ; Fri, 21 Feb 2020 16:56:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linux.kernel.org header.i=@linux.kernel.org header.b="aFBPxxRJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5DDF024656 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=atomide.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=bounce+26986+1427+1554929+3438807@linux.kernel.org X-Received: by 127.0.0.2 with SMTP id KFhyYY1556264xyvMYVmCqq8; Fri, 21 Feb 2020 08:56:35 -0800 X-Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mx.groups.io with SMTP id smtpd.web12.11497.1582304183615962050 for ; Fri, 21 Feb 2020 08:56:23 -0800 X-Received: by mail.kernel.org (Postfix) id 2E75E222C4; Fri, 21 Feb 2020 16:56:23 +0000 (UTC) X-Received: from muru.com (muru.com [72.249.23.125]) by mail.kernel.org (Postfix) with ESMTP id CAF14208C4; Fri, 21 Feb 2020 16:56:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CAF14208C4 X-Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 8B7F7807E; Fri, 21 Feb 2020 16:57:06 +0000 (UTC) From: Tony Lindgren To: Linuxkernel+Patchwork-Soc via Email Integration Cc: arm@kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "Tony Lindgren" , Lee Jones , Tomi Valkeinen , Pavel Machek Subject: [GIT PULL] Fix LCD backlight issue for droid4 Date: Fri, 21 Feb 2020 08:55:55 -0800 Message-Id: MIME-Version: 1.0 Precedence: Bulk List-Unsubscribe: Sender: patchwork-soc@linux.kernel.org List-Id: Mailing-List: list patchwork-soc@linux.kernel.org; contact patchwork-soc+owner@linux.kernel.org Delivered-To: mailing list patchwork-soc@linux.kernel.org Reply-To: patchwork-soc+owner@linux.kernel.org X-Gm-Message-State: 2BjEqaa3xtTwMWdNFTNCEZtYx1554929AA= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux.kernel.org; q=dns/txt; s=20140610; t=1582304195; bh=l+UBh0lY+IWbGXphTvjPW4QzJpSmtMBbYlajsAK8Zhg=; h=Cc:Content-Type:Date:From:Reply-To:Subject:To; b=aFBPxxRJyfK2ziZBNE9xoH6XehHsYdoV2+ZkymPh5kgZsvTNQgS/FWecLZKnK4pDqbo CDMZnmf734twPspJMwmqYRUAyMzpJZiUtBm+1Q1RnaqWLSoUUCMyBLjzGDQeWOVHOySXb /8SS3Z+ObvCdDzcwKwGQnM+f7Bg/nQGI06o= From: "Tony Lindgren" The following changes since commit bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9: Linux 5.6-rc1 (2020-02-09 16:08:48 -0800) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap tags/omap-for-v5.6/droid4-lcd-fix-signed for you to fetch changes up to 10dc62d0ae4167770e9ab150fc1ab55baa82e010: ARM: dts: droid4: Configure LED backlight for lm3532 (2020-02-20 06:51:13 -0800) ---------------------------------------------------------------- Fix LCD backlight issue for droid4 for v5.6 There was a bit of an integration glitch with the LED backlight series. The LED related parts got merged into v5.6-rc1, but the actual backlight driver got left out. This caused an issue on at least droid4 where the LCD backlight can not yet be enabled automatically. And the LCD backlight can no longer be enabled manually either via sysfs. The integration glitch happened because some pending comments from me. There was some confusion on which device tree property we should use for the default brightness property. After discussing how to fix this on the mailing lists, we came to the conclusion that it's best to fix this issue properly by adding the missing driver. The other solutions would mean backpedaling and try to come up with some temporary solution that really does not solve the issue for users. The patch for led_bl.c has been around for quite a while and tested by many users and was assumed to be merged as part of the LED backlight series. For the brightness property to use, we ended up using the more common "default-brightness-level" rather than "default-brightness" used by some backlight drivers. ---------------------------------------------------------------- Tomi Valkeinen (1): backlight: add led-backlight driver Tony Lindgren (1): ARM: dts: droid4: Configure LED backlight for lm3532 arch/arm/boot/dts/motorola-mapphone-common.dtsi | 13 +- arch/arm/configs/omap2plus_defconfig | 1 + drivers/video/backlight/Kconfig | 7 + drivers/video/backlight/Makefile | 1 + drivers/video/backlight/led_bl.c | 260 ++++++++++++++++++++++++ 5 files changed, 280 insertions(+), 2 deletions(-) create mode 100644 drivers/video/backlight/led_bl.c -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. 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