From patchwork Tue Oct 12 10:37:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 12552067 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 E47BFC433FE for ; Tue, 12 Oct 2021 10:38:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CF653610A3 for ; Tue, 12 Oct 2021 10:38:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236017AbhJLKkG (ORCPT ); Tue, 12 Oct 2021 06:40:06 -0400 Received: from muru.com ([72.249.23.125]:43718 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236075AbhJLKkF (ORCPT ); Tue, 12 Oct 2021 06:40:05 -0400 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 392468127; Tue, 12 Oct 2021 10:38:34 +0000 (UTC) From: Tony Lindgren To: Ulf Hansson Cc: Adrian Hunter , Chunyan Zhang , Faiz Abbas , Kishon Vijay Abraham I , Santosh Shilimkar , linux-mmc@vger.kernel.org, linux-omap@vger.kernel.org, Rob Herring , devicetree@vger.kernel.org Subject: [PATCH 4/6] mmc: sdhci-omap: Implement PM runtime functions Date: Tue, 12 Oct 2021 13:37:48 +0300 Message-Id: <20211012103750.38328-5-tony@atomide.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211012103750.38328-1-tony@atomide.com> References: <20211012103750.38328-1-tony@atomide.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Implement PM runtime functions and enable autosuspend. Note that we save context in probe to avoid restoring invalid context on the first resume. For system suspend, we have the new PM runtime functions do most of the work. Signed-off-by: Tony Lindgren Reported-by: kernel test robot --- drivers/mmc/host/sdhci-omap.c | 78 ++++++++++++++++++++++++++++------- 1 file changed, 63 insertions(+), 15 deletions(-) diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c --- a/drivers/mmc/host/sdhci-omap.c +++ b/drivers/mmc/host/sdhci-omap.c @@ -1207,6 +1207,8 @@ static const struct soc_device_attribute sdhci_omap_soc_devices[] = { } }; +static void sdhci_omap_context_save(struct sdhci_omap_host *omap_host); + static int sdhci_omap_probe(struct platform_device *pdev) { int ret; @@ -1252,6 +1254,7 @@ static int sdhci_omap_probe(struct platform_device *pdev) omap_host->timing = MMC_TIMING_LEGACY; omap_host->flags = data->flags; omap_host->omap_offset = data->omap_offset; + omap_host->con = -EINVAL; host->ioaddr += offset; host->mapbase = regs->start + offset; @@ -1302,6 +1305,8 @@ static int sdhci_omap_probe(struct platform_device *pdev) * SYSCONFIG register of omap devices. The callback will be invoked * as part of pm_runtime_get_sync. */ + pm_runtime_use_autosuspend(dev); + pm_runtime_set_autosuspend_delay(dev, 50); pm_runtime_enable(dev); ret = pm_runtime_resume_and_get(dev); if (ret) { @@ -1312,7 +1317,7 @@ static int sdhci_omap_probe(struct platform_device *pdev) ret = sdhci_omap_set_capabilities(host); if (ret) { dev_err(dev, "failed to set system capabilities\n"); - goto err_put_sync; + goto err_rpm_put; } host->mmc_host_ops.start_signal_voltage_switch = @@ -1340,7 +1345,7 @@ static int sdhci_omap_probe(struct platform_device *pdev) ret = sdhci_setup_host(host); if (ret) - goto err_put_sync; + goto err_rpm_put; ret = sdhci_omap_config_iodelay_pinctrl_state(omap_host); if (ret) @@ -1350,15 +1355,21 @@ static int sdhci_omap_probe(struct platform_device *pdev) if (ret) goto err_cleanup_host; + sdhci_omap_context_save(omap_host); + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + return 0; err_cleanup_host: sdhci_cleanup_host(host); -err_put_sync: - pm_runtime_put_sync(dev); - +err_rpm_put: + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); err_rpm_disable: + pm_runtime_dont_use_autosuspend(dev); pm_runtime_disable(dev); err_pltfm_free: @@ -1371,8 +1382,12 @@ static int sdhci_omap_remove(struct platform_device *pdev) struct device *dev = &pdev->dev; struct sdhci_host *host = platform_get_drvdata(pdev); + pm_runtime_get_sync(dev); sdhci_remove_host(host, true); + pm_runtime_dont_use_autosuspend(dev); pm_runtime_put_sync(dev); + /* Ensure device gets idled despite userspace sysfs config */ + pm_runtime_force_suspend(dev); pm_runtime_disable(dev); sdhci_pltfm_free(pdev); @@ -1402,42 +1417,75 @@ static void sdhci_omap_context_restore(struct sdhci_omap_host *omap_host) sdhci_omap_writel(omap_host, SDHCI_OMAP_ISE, omap_host->ise); } -static int __maybe_unused sdhci_omap_suspend(struct device *dev) +static int __maybe_unused sdhci_omap_runtime_suspend(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); - sdhci_suspend_host(host); + sdhci_runtime_suspend_host(host); sdhci_omap_context_save(omap_host); pinctrl_pm_select_idle_state(dev); - pm_runtime_force_suspend(dev); - return 0; } -static int __maybe_unused sdhci_omap_resume(struct device *dev) +static int __maybe_unused sdhci_omap_runtime_resume(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); - pm_runtime_force_resume(dev); - pinctrl_pm_select_default_state(dev); - sdhci_omap_context_restore(omap_host); + if (omap_host->con != -EINVAL) + sdhci_omap_context_restore(omap_host); + + sdhci_runtime_resume_host(host, 0); + + return 0; +} + +static int __maybe_unused sdhci_omap_suspend(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + int err; + + /* Enable for configuring wakeups, paired in resume */ + err = pm_runtime_resume_and_get(dev); + if (err < 0) + return err; + + sdhci_suspend_host(host); + + return pm_runtime_force_suspend(dev); +} + +static int __maybe_unused sdhci_omap_resume(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + int err; + + err = pm_runtime_force_resume(dev); + if (err < 0) + dev_warn(dev, "force resume failed: %i\n", err); sdhci_resume_host(host); + /* Balance pm_runtime_resume_and_get() done in suspend */ + pm_runtime_put(dev); + return 0; } #endif -static SIMPLE_DEV_PM_OPS(sdhci_omap_dev_pm_ops, sdhci_omap_suspend, - sdhci_omap_resume); + +static const struct dev_pm_ops sdhci_omap_dev_pm_ops = { + SET_RUNTIME_PM_OPS(sdhci_omap_runtime_suspend, + sdhci_omap_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(sdhci_omap_suspend, sdhci_omap_resume) +}; static struct platform_driver sdhci_omap_driver = { .probe = sdhci_omap_probe,