From patchwork Wed Nov 2 02:40:16 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenyou Yang X-Patchwork-Id: 9408425 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 04AE2600C8 for ; Wed, 2 Nov 2016 02:44:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E76A829D66 for ; Wed, 2 Nov 2016 02:44:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DC2E129D68; Wed, 2 Nov 2016 02:44:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6C63C29D66 for ; Wed, 2 Nov 2016 02:44:22 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1c1lU9-0004N3-BO; Wed, 02 Nov 2016 02:41:05 +0000 Received: from eusmtp01.atmel.com ([212.144.249.242]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1c1lU3-0004L5-Jh for linux-arm-kernel@lists.infradead.org; Wed, 02 Nov 2016 02:41:00 +0000 Received: from apsmtp01.atmel.com (10.168.254.30) by eusmtp01.atmel.com (10.145.145.30) with Microsoft SMTP Server id 14.3.235.1; Wed, 2 Nov 2016 03:40:32 +0100 Received: from shaarm01.corp.atmel.com (10.168.254.13) by apsmtp01.corp.atmel.com (10.168.254.30) with Microsoft SMTP Server id 14.3.235.1; Wed, 2 Nov 2016 10:41:41 +0800 From: Wenyou Yang To: Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler Subject: [PATCH v1] iio: adc: at91: add suspend and resume callback Date: Wed, 2 Nov 2016 10:40:16 +0800 Message-ID: <1478054417-7520-1-git-send-email-wenyou.yang@atmel.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161101_194059_985044_E303EB78 X-CRM114-Status: UNSURE ( 9.95 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Wenyou Yang , linux-iio@vger.kernel.org, Nicolas Ferre , linux-kernel@vger.kernel.org, Wenyou Yang , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add suspend/resume callback, support the pinctrl sleep state when the system suspend as well. Signed-off-by: Wenyou Yang --- drivers/iio/adc/at91_adc.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c index bbdac07..ffa81a1 100644 --- a/drivers/iio/adc/at91_adc.c +++ b/drivers/iio/adc/at91_adc.c @@ -30,6 +30,7 @@ #include #include #include +#include /* Registers */ #define AT91_ADC_CR 0x00 /* Control Register */ @@ -1347,6 +1348,39 @@ static int at91_adc_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static int at91_adc_suspend(struct device *dev) +{ + struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev)); + struct at91_adc_state *st = iio_priv(idev); + + pinctrl_pm_select_sleep_state(dev); + clk_disable_unprepare(st->clk); + + return 0; +} + +static int at91_adc_resume(struct device *dev) +{ + struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev)); + struct at91_adc_state *st = iio_priv(idev); + + clk_prepare_enable(st->clk); + pinctrl_pm_select_default_state(dev); + + return 0; +} + +static const struct dev_pm_ops at91_adc_pm_ops = { + .suspend = at91_adc_suspend, + .resume = at91_adc_resume, +}; + +#define AT91_ADC_PM_OPS (&at91_adc_pm_ops) +#else +#define AT91_ADC_PM_OPS NULL +#endif + static struct at91_adc_caps at91sam9260_caps = { .calc_startup_ticks = calc_startup_ticks_9260, .num_channels = 4, @@ -1441,6 +1475,7 @@ static struct platform_driver at91_adc_driver = { .driver = { .name = DRIVER_NAME, .of_match_table = of_match_ptr(at91_adc_dt_ids), + .pm = AT91_ADC_PM_OPS, }, };