From patchwork Thu Mar 21 12:10:00 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 229642 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 4A2D12C00B5 for ; Thu, 21 Mar 2013 23:09:16 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758019Ab3CUMIU (ORCPT ); Thu, 21 Mar 2013 08:08:20 -0400 Received: from mga02.intel.com ([134.134.136.20]:37558 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757952Ab3CUMIT (ORCPT ); Thu, 21 Mar 2013 08:08:19 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP; 21 Mar 2013 05:08:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,884,1355126400"; d="scan'208";a="305573509" Received: from blue.fi.intel.com ([10.237.72.156]) by orsmga002.jf.intel.com with ESMTP; 21 Mar 2013 05:08:16 -0700 Received: by blue.fi.intel.com (Postfix, from userid 1004) id DFCC5E008D; Thu, 21 Mar 2013 14:10:00 +0200 (EET) From: Mika Westerberg To: linux-kernel@vger.kernel.org Cc: linux-i2c@vger.kernel.org, Wolfram Sang , ben-linux@fluff.org, Jean Delvare , Andy Shevchenko , Christian Ruppert , Mika Westerberg Subject: [PATCH 7/7] i2c-designware: switch to use runtime PM autosuspend Date: Thu, 21 Mar 2013 14:10:00 +0200 Message-Id: <1363867800-23861-7-git-send-email-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1363867800-23861-1-git-send-email-mika.westerberg@linux.intel.com> References: <1363867800-23861-1-git-send-email-mika.westerberg@linux.intel.com> Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Using autosuspend helps to reduce the resume latency in situations where another I2C message is going to be started soon. For example with HID over I2C touch panels we get several messages in a short period of time while the touch panel is in use. Signed-off-by: Mika Westerberg --- drivers/i2c/busses/i2c-designware-core.c | 3 ++- drivers/i2c/busses/i2c-designware-pcidrv.c | 3 ++- drivers/i2c/busses/i2c-designware-platdrv.c | 3 ++- 3 files changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c index 0849648..71d33e6 100644 --- a/drivers/i2c/busses/i2c-designware-core.c +++ b/drivers/i2c/busses/i2c-designware-core.c @@ -595,7 +595,8 @@ i2c_dw_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) ret = -EIO; done: - pm_runtime_put(dev->dev); + pm_runtime_mark_last_busy(dev->dev); + pm_runtime_put_autosuspend(dev->dev); mutex_unlock(&dev->lock); return ret; diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c index aacb64e..c8797e2 100644 --- a/drivers/i2c/busses/i2c-designware-pcidrv.c +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c @@ -291,7 +291,8 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, /* Increase reference counter */ get_device(&pdev->dev); - pm_runtime_put_noidle(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, 1000); + pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_allow(&pdev->dev); return 0; diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index a22a852..46a25ca 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -175,9 +175,10 @@ static int dw_i2c_probe(struct platform_device *pdev) /* Increase reference counter */ get_device(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, 1000); + pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); - pm_runtime_put(&pdev->dev); return 0; }