From patchwork Sun Jan 10 19:05:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 12009381 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=-14.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, 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 EFC02C43332 for ; Sun, 10 Jan 2021 19:07:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C322422AAE for ; Sun, 10 Jan 2021 19:07:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727063AbhAJTGa (ORCPT ); Sun, 10 Jan 2021 14:06:30 -0500 Received: from muru.com ([72.249.23.125]:42306 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726267AbhAJTGa (ORCPT ); Sun, 10 Jan 2021 14:06:30 -0500 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 769CD8140; Sun, 10 Jan 2021 19:05:48 +0000 (UTC) From: Tony Lindgren To: Dmitry Torokhov Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Arthur Demchenkov , Carl Philipp Klemm , Merlijn Wajer , Pavel Machek , ruleh , Sebastian Reichel Subject: [PATCH 4/5] Input: omap4-keypad - use PM runtime autosuspend Date: Sun, 10 Jan 2021 21:05:28 +0200 Message-Id: <20210110190529.46135-5-tony@atomide.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210110190529.46135-1-tony@atomide.com> References: <20210110190529.46135-1-tony@atomide.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Implement PM runtime autosuspend support to prepare for adding handling to clear stuck last pressed key in the following patches. The hardware has support for autoidle and can wake up to keypress events. Cc: Arthur Demchenkov Cc: Carl Philipp Klemm Cc: Merlijn Wajer Cc: Pavel Machek Cc: ruleh Cc: Sebastian Reichel Signed-off-by: Tony Lindgren Signed-off-by: Tony Lindgren --- drivers/input/keyboard/omap4-keypad.c | 49 +++++++++++++++++++++------ 1 file changed, 38 insertions(+), 11 deletions(-) diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c --- a/drivers/input/keyboard/omap4-keypad.c +++ b/drivers/input/keyboard/omap4-keypad.c @@ -184,6 +184,14 @@ static void omap4_keypad_scan_keys(struct omap4_keypad *keypad_data, bool clear) static irqreturn_t omap4_keypad_irq_thread_fn(int irq, void *dev_id) { struct omap4_keypad *keypad_data = dev_id; + struct device *dev = keypad_data->input->dev.parent; + int error; + + error = pm_runtime_get_sync(dev); + if (error < 0) { + pm_runtime_put_noidle(dev); + return IRQ_NONE; + } omap4_keypad_scan_keys(keypad_data, false); @@ -191,14 +199,23 @@ static irqreturn_t omap4_keypad_irq_thread_fn(int irq, void *dev_id) kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS, kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS)); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + return IRQ_HANDLED; } static int omap4_keypad_open(struct input_dev *input) { struct omap4_keypad *keypad_data = input_get_drvdata(input); + struct device *dev = input->dev.parent; + int error; - pm_runtime_get_sync(input->dev.parent); + error = pm_runtime_get_sync(dev); + if (error < 0) { + pm_runtime_put_noidle(dev); + return error; + } disable_irq(keypad_data->irq); @@ -217,6 +234,9 @@ static int omap4_keypad_open(struct input_dev *input) enable_irq(keypad_data->irq); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + return 0; } @@ -234,14 +254,20 @@ static void omap4_keypad_stop(struct omap4_keypad *keypad_data) static void omap4_keypad_close(struct input_dev *input) { - struct omap4_keypad *keypad_data; + struct omap4_keypad *keypad_data = input_get_drvdata(input); + struct device *dev = input->dev.parent; + int error; + + error = pm_runtime_get_sync(dev); + if (error < 0) + pm_runtime_put_noidle(dev); - keypad_data = input_get_drvdata(input); disable_irq(keypad_data->irq); omap4_keypad_stop(keypad_data); enable_irq(keypad_data->irq); - pm_runtime_put_sync(input->dev.parent); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); } static int omap4_keypad_parse_dt(struct device *dev, @@ -288,6 +314,7 @@ static int omap4_keypad_check_revision(struct device *dev, static void omap4_disable_pm(void *d) { + pm_runtime_dont_use_autosuspend(d); pm_runtime_disable(d); } @@ -320,6 +347,7 @@ static int omap4_keypad_probe(struct platform_device *pdev) keypad_data->irq = irq; mutex_init(&keypad_data->lock); + platform_set_drvdata(pdev, keypad_data); error = omap4_keypad_parse_dt(dev, keypad_data); if (error) @@ -329,6 +357,7 @@ static int omap4_keypad_probe(struct platform_device *pdev) if (IS_ERR(keypad_data->base)) return PTR_ERR(keypad_data->base); + pm_runtime_use_autosuspend(dev); pm_runtime_enable(dev); error = devm_add_action_or_reset(dev, omap4_disable_pm, dev); @@ -350,15 +379,12 @@ static int omap4_keypad_probe(struct platform_device *pdev) error = omap4_keypad_check_revision(&pdev->dev, keypad_data); - if (!error) { - /* Ensure device does not raise interrupts */ - omap4_keypad_stop(keypad_data); - } - - pm_runtime_put_sync(&pdev->dev); if (error) return error; + /* Ensure device does not raise interrupts */ + omap4_keypad_stop(keypad_data); + /* input device allocation */ keypad_data->input = input_dev = devm_input_allocate_device(dev); if (!input_dev) @@ -419,7 +445,8 @@ static int omap4_keypad_probe(struct platform_device *pdev) if (error) dev_warn(dev, "failed to set up wakeup irq: %d\n", error); - platform_set_drvdata(pdev, keypad_data); + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_put_autosuspend(&pdev->dev); return 0; }