From patchwork Mon Jun 1 17:53:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 224991 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D544DC433DF for ; Mon, 1 Jun 2020 18:40:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B6F59206A4 for ; Mon, 1 Jun 2020 18:40:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591036836; bh=BYyPzYkx4ERUweSk9BWxGWyjc7yozBVun6QzBUsgIKA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=KhkCR9WtQYpGBLdM6skQIc+gbIxKq1O26huenI1m09dJGjkCeMC3sGIdtlKZUovVF MyBysL15kXpqa4G7zqD+aiZeyuZRwKOTwiTGBz18hTQKKC3X2Uv4QOqiZEsoRPBC1k v2TW/rLb/9lC6zEfpp9/QSdeSTPof5TgMiNE2z5E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727998AbgFASka (ORCPT ); Mon, 1 Jun 2020 14:40:30 -0400 Received: from mail.kernel.org ([198.145.29.99]:32778 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729949AbgFASNU (ORCPT ); Mon, 1 Jun 2020 14:13:20 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 767F520776; Mon, 1 Jun 2020 18:13:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591035199; bh=BYyPzYkx4ERUweSk9BWxGWyjc7yozBVun6QzBUsgIKA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=muAWTP9uCQfwCfp3WhvryRTpkhEm4pM64cpMuuPjTyJiJDhn2c4ZKNtUUjT0cVFok btM+mJCBJGGRxnSSL4e+lU3hSNHr4sszoguPyeFN6hxG5wXdTMFivWrL7mDEWv2+f9 PymN6m8PRHywL/2HF1kBtXbTy+n6y+iYLHuG+A7o= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, maemo-leste@lists.dyne.org, Merlijn Wajer , Pavel Machek , Sebastian Reichel , Tony Lindgren , Sasha Levin Subject: [PATCH 5.6 054/177] ARM: dts: omap4-droid4: Fix occasional lost wakeirq for uart1 Date: Mon, 1 Jun 2020 19:53:12 +0200 Message-Id: <20200601174053.535982357@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200601174048.468952319@linuxfoundation.org> References: <20200601174048.468952319@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Tony Lindgren [ Upstream commit 738b150ecefbffb6e55cfa8a3b66a844f777d8fb ] Looks like using the UART CTS pin does not always trigger for a wake-up when the SoC is idle. This is probably because the modem first uses gpio_149 to signal the SoC that data will be sent, and the CTS will only get used later when the data transfer is starting. Let's fix the issue by configuring the gpio_149 pad as the wakeirq for UART. We have gpio_149 managed by the USB PHY for powering up the right USB mode, and after that, the gpio gets recycled as the modem wake-up pin. If needeed, the USB PHY can also later on be configured to use gpio_149 pad as the wakeirq as a shared irq. Let's also configure the missing properties for uart-has-rtscts and current-speed for the modem port while at it. We already configure the hardware flow control pins with uart1_pins pinctrl setting. Cc: maemo-leste@lists.dyne.org Cc: Merlijn Wajer Cc: Pavel Machek Cc: Sebastian Reichel Signed-off-by: Tony Lindgren Signed-off-by: Sasha Levin --- arch/arm/boot/dts/motorola-mapphone-common.dtsi | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/arm/boot/dts/motorola-mapphone-common.dtsi b/arch/arm/boot/dts/motorola-mapphone-common.dtsi index 01ea9a1e2c86..06fbffa81636 100644 --- a/arch/arm/boot/dts/motorola-mapphone-common.dtsi +++ b/arch/arm/boot/dts/motorola-mapphone-common.dtsi @@ -723,14 +723,18 @@ }; /* - * As uart1 is wired to mdm6600 with rts and cts, we can use the cts pin for - * uart1 wakeirq. + * The uart1 port is wired to mdm6600 with rts and cts. The modem uses gpio_149 + * for wake-up events for both the USB PHY and the UART. We can use gpio_149 + * pad as the shared wakeirq for the UART rather than the RX or CTS pad as we + * have gpio_149 trigger before the UART transfer starts. */ &uart1 { pinctrl-names = "default"; pinctrl-0 = <&uart1_pins>; interrupts-extended = <&wakeupgen GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH - &omap4_pmx_core 0xfc>; + &omap4_pmx_core 0x110>; + uart-has-rtscts; + current-speed = <115200>; }; &uart3 {