From patchwork Mon Nov 15 08:41:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 12618923 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F7C6C433F5 for ; Mon, 15 Nov 2021 08:42:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 13AA061BF8 for ; Mon, 15 Nov 2021 08:42:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230245AbhKOIpN (ORCPT ); Mon, 15 Nov 2021 03:45:13 -0500 Received: from muru.com ([72.249.23.125]:56354 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230047AbhKOIpM (ORCPT ); Mon, 15 Nov 2021 03:45:12 -0500 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id CB324806C; Mon, 15 Nov 2021 08:42:51 +0000 (UTC) From: Tony Lindgren To: Greg Kroah-Hartman Cc: Andy Shevchenko , Jiri Slaby , Johan Hovold , Sebastian Andrzej Siewior , Vignesh Raghavendra , linux-serial@vger.kernel.org, linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, Andy Shevchenko Subject: [PATCHv4 0/7] Serial port generic PM to fix 8250 PM Date: Mon, 15 Nov 2021 10:41:56 +0200 Message-Id: <20211115084203.56478-1-tony@atomide.com> X-Mailer: git-send-email 2.33.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Hi, Here are v4 patches for serial port generic PM. The scope has now expanded a bit from the earlier attempts to get rid of pm_runtime_irq_safe() for the 8250_omap driver. I've now picked up three patches from Andy's earlier generic serial port PM series. Regards, Tony Changes since v3: - Pick three patches from Andy's earlier serial port PM series to handle issues pointed out by Johan Chganges since v2: - Use locking instead of atomic_t as suggested by Greg Changes since v1: - Separated out line discipline patches, n_tty -EAGAIN change I still need to retest - Changed prep_tx() to more generic wakeup() as also flow control needs it - Changed over to using wakeup() with device driver runtime PM instead of write_room() - Added runtime_suspended flag for drivers and generic serial layer PM to use Andy Shevchenko (3): serial: core: Add support of runtime PM serial: 8250_port: properly handle runtime PM in IRQ serial: 8250_port: Remove calls to runtime PM Tony Lindgren (4): serial: core: Add wakeup() and start_pending_tx() for asynchronous wake serial: 8250: Implement wakeup for TX and use it for 8250_omap serial: 8250_omap: Require a valid wakeirq for deeper idle states serial: 8250_omap: Drop the use of pm_runtime_irq_safe() Documentation/driver-api/serial/driver.rst | 9 + drivers/tty/serial/8250/8250.h | 3 - drivers/tty/serial/8250/8250_omap.c | 44 +++-- drivers/tty/serial/8250/8250_port.c | 151 ++++++++-------- drivers/tty/serial/serial_core.c | 199 +++++++++++++++++++-- include/linux/serial_core.h | 3 + 6 files changed, 305 insertions(+), 104 deletions(-)