Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755223AbcKBCkl (ORCPT ); Tue, 1 Nov 2016 22:40:41 -0400 Received: from eusmtp01.atmel.com ([212.144.249.242]:52280 "EHLO eusmtp01.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753888AbcKBCkj (ORCPT ); Tue, 1 Nov 2016 22:40:39 -0400 From: Wenyou Yang To: Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler CC: , Wenyou Yang , , Nicolas Ferre , , Wenyou Yang 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 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1842 Lines: 71 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, }, }; -- 2.7.4