From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F19F9C43217 for ; Tue, 15 Feb 2022 16:02:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241185AbiBOQCe (ORCPT ); Tue, 15 Feb 2022 11:02:34 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:59208 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237847AbiBOQCb (ORCPT ); Tue, 15 Feb 2022 11:02:31 -0500 Received: from hs01.dk-develop.de (hs01.dk-develop.de [173.249.23.66]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 14F0BB88; Tue, 15 Feb 2022 08:02:19 -0800 (PST) From: Danilo Krummrich To: dmitry.torokhov@gmail.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Cc: linus.walleij@linaro.org Subject: ps2-gpio: use ktime for IRQ timekeeping Date: Tue, 15 Feb 2022 17:02:04 +0100 Message-Id: <20220215160208.34826-1-danilokrummrich@dk-develop.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Changes since v1 ================ - add patch to refactor struct ps2_gpio_data for clear separation between RX and TX - make all variables for IRQ timekeeping per-port and initialize them in ps2_gpio_open() This patch series implements the usage of ktime for IRQ timekeeping to overcome: (1) The resolution limitations of jiffies. (2) Potential spurious IRQs generated by gpio controllers. Besides that, based on the newly implemented timekeeping, it fixes a wrongly suspected extra clock cycle for TX transfers and a race condition when starting an immediate TX transfer based on data received from an RX transfer. Danilo Krummrich (4): input: ps2-gpio: refactor struct ps2_gpio_data input: ps2-gpio: use ktime for IRQ timekeeping input: ps2-gpio: remove tx timeout from ps2_gpio_irq_tx() input: ps2-gpio: don't send rx data before the stop bit drivers/input/serio/ps2-gpio.c | 180 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------------------------------ 1 file changed, 116 insertions(+), 64 deletions(-)