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 X-Spam-Level: X-Spam-Status: No, score=-10.9 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, URIBL_BLOCKED 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 623FAC433DB for ; Mon, 11 Jan 2021 06:03:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 30DFA22581 for ; Mon, 11 Jan 2021 06:03:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727364AbhAKGDg (ORCPT ); Mon, 11 Jan 2021 01:03:36 -0500 Received: from muru.com ([72.249.23.125]:42646 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727363AbhAKGDg (ORCPT ); Mon, 11 Jan 2021 01:03:36 -0500 Received: from atomide.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTPS id BF72B80E4; Mon, 11 Jan 2021 06:02:53 +0000 (UTC) Date: Mon, 11 Jan 2021 08:02:50 +0200 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: Re: [PATCH 4/5] Input: omap4-keypad - use PM runtime autosuspend Message-ID: References: <20210110190529.46135-1-tony@atomide.com> <20210110190529.46135-5-tony@atomide.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org * Tony Lindgren [210111 05:13]: > * Dmitry Torokhov [210111 05:01]: > > Hi Tony, > > > > On Sun, Jan 10, 2021 at 09:05:28PM +0200, Tony Lindgren wrote: > > > @@ -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); > > > > Why are we moving this down? The idea was to make sure the power usage > > counters are correct even if we exit probe early. > > Yes you are right, omap4_keypad_close() won't help with balancing the > get if we exit early. > > > Can we call pm_runtime_mark_last_busy() and pm_runtime_put_autosuspend() > > here? > > Yes that should work as there's no more register access during the probe. Below is an updated version. I updated probe to use dev instead of &pdev->dev since we have it there. Does this look OK to you? Regards, Tony 8< --------------------------- >From tony Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Sun, 10 Jan 2021 17:38:15 +0200 Subject: [PATCH] Input: omap4-keypad - use PM runtime autosuspend 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. Let's also update omap4_keypad_probe() to use dev instead of &pdev->dev since we already have it from the earlier changes. Cc: Arthur Demchenkov Cc: Carl Philipp Klemm Cc: Merlijn Wajer Cc: Pavel Machek Cc: ruleh Cc: Sebastian Reichel Signed-off-by: Tony Lindgren --- drivers/input/keyboard/omap4-keypad.c | 51 ++++++++++++++++++++------- 1 file changed, 39 insertions(+), 12 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 @@ -172,9 +172,17 @@ static irqreturn_t omap4_keypad_irq_handler(int irq, void *dev_id) 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; u32 low, high; + int error; u64 keys; + error = pm_runtime_get_sync(dev); + if (error < 0) { + pm_runtime_put_noidle(dev); + return IRQ_NONE; + } + low = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE31_0); high = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE63_32); keys = low | (u64)high << 32; @@ -185,14 +193,23 @@ 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); @@ -211,6 +228,9 @@ 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; } @@ -228,14 +248,20 @@ 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, @@ -282,6 +308,7 @@ 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); } @@ -314,6 +341,7 @@ 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) @@ -323,6 +351,7 @@ 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); @@ -335,21 +364,21 @@ static int omap4_keypad_probe(struct platform_device *pdev) * Enable clocks for the keypad module so that we can read * revision register. */ - error = pm_runtime_get_sync(&pdev->dev); + error = pm_runtime_get_sync(dev); if (error) { - dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n"); - pm_runtime_put_noidle(&pdev->dev); + dev_err(dev, "pm_runtime_get_sync() failed\n"); + pm_runtime_put_noidle(dev); return error; } - error = omap4_keypad_check_revision(&pdev->dev, - keypad_data); + error = omap4_keypad_check_revision(dev, keypad_data); if (!error) { /* Ensure device does not raise interrupts */ omap4_keypad_stop(keypad_data); } - pm_runtime_put_sync(&pdev->dev); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); if (error) return error; @@ -413,8 +442,6 @@ 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); - return 0; } -- 2.30.0