Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752194AbaJTMmx (ORCPT ); Mon, 20 Oct 2014 08:42:53 -0400 Received: from eusmtp01.atmel.com ([212.144.249.242]:14950 "EHLO eusmtp01.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752109AbaJTMmn (ORCPT ); Mon, 20 Oct 2014 08:42:43 -0400 Date: Mon, 20 Oct 2014 14:42:42 +0200 From: Ludovic Desroches To: Wenyou Yang CC: , , , , , Subject: Re: [PATCH 2/3] i2c/at91: add support for system PM Message-ID: <20141020124242.GD7443@ldesroches-Latitude-E6320> Mail-Followup-To: Wenyou Yang , wsa@the-dreams.de, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, nicolas.ferre@atmel.com, linux-arm-kernel@lists.infradead.org References: <1413776535-10123-1-git-send-email-wenyou.yang@atmel.com> <1413776535-10123-3-git-send-email-wenyou.yang@atmel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <1413776535-10123-3-git-send-email-wenyou.yang@atmel.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 20, 2014 at 11:42:13AM +0800, Wenyou Yang wrote: > Signed-off-by: Wenyou Yang Acked by: Ludovic Desroches > --- > drivers/i2c/busses/i2c-at91.c | 30 ++++++++++++++++++++++++++++++ > 1 file changed, 30 insertions(+) > > diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c > index 03b9f48..8f408f8 100644 > --- a/drivers/i2c/busses/i2c-at91.c > +++ b/drivers/i2c/busses/i2c-at91.c > @@ -845,6 +845,35 @@ static int at91_twi_remove(struct platform_device *pdev) > } > > #ifdef CONFIG_PM > +#ifdef CONFIG_PM_SLEEP > +static int at91_twi_suspend(struct device *dev) > +{ > + struct at91_twi_dev *twi_dev = dev_get_drvdata(dev); > + > + if (!pm_runtime_suspended(dev)) > + clk_disable_unprepare(twi_dev->clk); > + > + return 0; > +} > + > +static int at91_twi_resume(struct device *dev) > +{ > + struct at91_twi_dev *twi_dev = dev_get_drvdata(dev); > + int ret; > + > + if (!pm_runtime_suspended(dev)) { > + ret = clk_prepare_enable(twi_dev->clk); > + if (ret) > + return ret; > + } > + > + pm_runtime_mark_last_busy(dev); > + pm_request_autosuspend(dev); > + > + return 0; > +} > +#endif > + > #ifdef CONFIG_PM_RUNTIME > static int at91_twi_runtime_suspend(struct device *dev) > { > @@ -864,6 +893,7 @@ static int at91_twi_runtime_resume(struct device *dev) > #endif > > static const struct dev_pm_ops at91_twi_pm = { > + SET_SYSTEM_SLEEP_PM_OPS(at91_twi_suspend, at91_twi_resume) > SET_RUNTIME_PM_OPS(at91_twi_runtime_suspend, > at91_twi_runtime_resume, NULL) > }; > -- > 1.7.9.5 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/