From patchwork Tue Jul 26 08:32:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Kepplinger X-Patchwork-Id: 12929027 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 93671C433EF for ; Tue, 26 Jul 2022 08:33:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229749AbiGZIdO (ORCPT ); Tue, 26 Jul 2022 04:33:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48806 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237458AbiGZIdM (ORCPT ); Tue, 26 Jul 2022 04:33:12 -0400 Received: from comms.puri.sm (comms.puri.sm [159.203.221.185]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A72362DA9A; Tue, 26 Jul 2022 01:33:11 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by comms.puri.sm (Postfix) with ESMTP id 50486DFD55; Tue, 26 Jul 2022 01:33:11 -0700 (PDT) Received: from comms.puri.sm ([127.0.0.1]) by localhost (comms.puri.sm [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id L9ens6mJboms; Tue, 26 Jul 2022 01:33:10 -0700 (PDT) From: Martin Kepplinger DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=puri.sm; s=comms; t=1658824390; bh=CtZHJaWb605GvXh6ITYJsJOpwsFY2AdI1ZfEZejnCUY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TYee2IzqBrFb+coRiZ+mLMST3G8YOOjBKdivuBC+tOe+iE5P1jHPzlC9B5PYjVnPr 84kVNjFtIaiNBMzpu95e29+0lz7Uj7Sfh2Awaqm477V41HaSe4Bn1Qd6xbRMg7mNGk 7Lfr+WFZ29JoN98BiJQw7jZT7jS0IpH9ZTRlLaVzGO254/jZoLSPNJGPsyjcSyVoNj MmhgDU/+r27L0MAXGVpgtQDD9ET0KnElWu+mXGMI7JFZZPZExqMjuUwQKFjuvZ9UWO jgvX7XJU9fLx+kN15K8nk5QEepqPo4jH9CTnjkN1IGYMK0V7e9c2bR/ckRh9gZJJfs /F2YGAD6WK7xw== To: rafael@kernel.org, khilman@kernel.org, ulf.hansson@linaro.org, robh@kernel.org, krzysztof.kozlowski@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, festevam@gmail.com, pavel@ucw.cz Cc: kernel@puri.sm, linux-imx@nxp.com, broonie@kernel.org, l.stach@pengutronix.de, aford173@gmail.com, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Martin Kepplinger Subject: [PATCH v6 1/2] power: domain: handle genpd correctly when needing interrupts Date: Tue, 26 Jul 2022 10:32:56 +0200 Message-Id: <20220726083257.1730630-2-martin.kepplinger@puri.sm> In-Reply-To: <20220726083257.1730630-1-martin.kepplinger@puri.sm> References: <20220726083257.1730630-1-martin.kepplinger@puri.sm> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org If for example the power-domains' power-supply node (regulator) needs interrupts to work, the current setup with noirq callbacks cannot work; for example a pmic regulator on i2c, when suspending, usually already times out during suspend_noirq: [ 41.024193] buck4: failed to disable: -ETIMEDOUT So fix system suspend and resume for these power-domains by using the "outer" suspend/resume callbacks instead. Tested on the imx8mq-librem5 board, but by looking at the dts, this will fix imx8mq-evk and possibly many other boards too. This is designed so that genpd providers just say "this genpd needs interrupts" (by setting the flag) - without implying an implementation. Initially system suspend problems had been discussed at https://lore.kernel.org/linux-arm-kernel/20211002005954.1367653-8-l.stach@pengutronix.de/ which led to discussing the pmic that contains the regulators which serve as power-domain power-supplies: https://lore.kernel.org/linux-pm/573166b75e524517782471c2b7f96e03fd93d175.camel@puri.sm/T/ Signed-off-by: Martin Kepplinger --- drivers/base/power/domain.c | 13 +++++++++++-- include/linux/pm_domain.h | 5 +++++ 2 files changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 5a2e0232862e..58376752a4de 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -130,6 +130,7 @@ static const struct genpd_lock_ops genpd_spin_ops = { #define genpd_is_active_wakeup(genpd) (genpd->flags & GENPD_FLAG_ACTIVE_WAKEUP) #define genpd_is_cpu_domain(genpd) (genpd->flags & GENPD_FLAG_CPU_DOMAIN) #define genpd_is_rpm_always_on(genpd) (genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON) +#define genpd_irq_on(genpd) (genpd->flags & GENPD_FLAG_IRQ_ON) static inline bool irq_safe_dev_in_sleep_domain(struct device *dev, const struct generic_pm_domain *genpd) @@ -2065,8 +2066,15 @@ int pm_genpd_init(struct generic_pm_domain *genpd, genpd->domain.ops.runtime_suspend = genpd_runtime_suspend; genpd->domain.ops.runtime_resume = genpd_runtime_resume; genpd->domain.ops.prepare = genpd_prepare; - genpd->domain.ops.suspend_noirq = genpd_suspend_noirq; - genpd->domain.ops.resume_noirq = genpd_resume_noirq; + + if (genpd_irq_on(genpd)) { + genpd->domain.ops.suspend = genpd_suspend_noirq; + genpd->domain.ops.resume = genpd_resume_noirq; + } else { + genpd->domain.ops.suspend_noirq = genpd_suspend_noirq; + genpd->domain.ops.resume_noirq = genpd_resume_noirq; + } + genpd->domain.ops.freeze_noirq = genpd_freeze_noirq; genpd->domain.ops.thaw_noirq = genpd_thaw_noirq; genpd->domain.ops.poweroff_noirq = genpd_poweroff_noirq; @@ -2769,6 +2777,7 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev, goto err; dev_gpd_data(dev)->default_pstate = pstate; } + return 1; err: diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index ebc351698090..9cdedbc21158 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -60,6 +60,10 @@ * GENPD_FLAG_MIN_RESIDENCY: Enable the genpd governor to consider its * components' next wakeup when determining the * optimal idle state. + * + * GENPD_FLAG_IRQ_ON: genpd needs irqs to be able to manage power + * on/off. Use the outer suspend/resume callbacks + * instead of noirq for example. */ #define GENPD_FLAG_PM_CLK (1U << 0) #define GENPD_FLAG_IRQ_SAFE (1U << 1) @@ -68,6 +72,7 @@ #define GENPD_FLAG_CPU_DOMAIN (1U << 4) #define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5) #define GENPD_FLAG_MIN_RESIDENCY (1U << 6) +#define GENPD_FLAG_IRQ_ON (1U << 7) enum gpd_status { GENPD_STATE_ON = 0, /* PM domain is on */