From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754681AbaAIK5N (ORCPT ); Thu, 9 Jan 2014 05:57:13 -0500 Received: from arroyo.ext.ti.com ([192.94.94.40]:41719 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754480AbaAIK4f (ORCPT ); Thu, 9 Jan 2014 05:56:35 -0500 From: Roger Quadros To: CC: , , , , , , , , Roger Quadros , Balaji T K Subject: [PATCH v4 3/3] ata: ahci_platform: runtime resume the device before use Date: Thu, 9 Jan 2014 16:26:02 +0530 Message-ID: <1389264962-22858-4-git-send-email-rogerq@ti.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1389264962-22858-1-git-send-email-rogerq@ti.com> References: <1389264962-22858-1-git-send-email-rogerq@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On OMAP platforms the device needs to be runtime resumed before it can be accessed. The OMAP HWMOD framework takes care of enabling the module and its resources based on the device's runtime PM state. In this patch we runtime resume during .probe() and runtime suspend during .remove() (i.e. ahci_host_stop()). We also update the runtime PM state during .resume(). Signed-off-by: Roger Quadros Signed-off-by: Balaji T K --- drivers/ata/ahci_platform.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c index b476642..8a70e5b 100644 --- a/drivers/ata/ahci_platform.c +++ b/drivers/ata/ahci_platform.c @@ -23,6 +23,7 @@ #include #include #include +#include #include "ahci.h" static void ahci_host_stop(struct ata_host *host); @@ -142,6 +143,9 @@ static int ahci_probe(struct platform_device *pdev) } } + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + hpriv->phy = devm_phy_get(dev, "sata-phy"); if (IS_ERR(hpriv->phy)) { rc = PTR_ERR(hpriv->phy); @@ -287,6 +291,9 @@ static void ahci_host_stop(struct ata_host *host) clk_disable_unprepare(hpriv->clk); clk_put(hpriv->clk); } + + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); } #ifdef CONFIG_PM_SLEEP @@ -358,6 +365,11 @@ static int ahci_resume(struct device *dev) ata_host_resume(host); + /* We resumed so update PM runtime state */ + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + return 0; disable_unprepare_clk: -- 1.8.3.2