Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752704AbdFVFpH (ORCPT ); Thu, 22 Jun 2017 01:45:07 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:49243 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752665AbdFVFpE (ORCPT ); Thu, 22 Jun 2017 01:45:04 -0400 From: Zhiyong Tao To: , , , , CC: , , , , , , , , , , , Zhiyong Tao Subject: [PATCH 2/3] iio: adc: mt7622: add support for suspend/resume. Date: Thu, 22 Jun 2017 13:44:33 +0800 Message-ID: <1498110274-18678-3-git-send-email-zhiyong.tao@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1498110274-18678-1-git-send-email-zhiyong.tao@mediatek.com> References: <1498110274-18678-1-git-send-email-zhiyong.tao@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2214 Lines: 73 This patch supports auxadc suspend/resume flow. Disable auxadc clk and power in suspend function. Enable axuadc clk and power in resume function. Signed-off-by: Zhiyong Tao --- drivers/iio/adc/mt6577_auxadc.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c index 2d104c8..2dd7c74 100644 --- a/drivers/iio/adc/mt6577_auxadc.c +++ b/drivers/iio/adc/mt6577_auxadc.c @@ -184,6 +184,37 @@ static int mt6577_auxadc_read_raw(struct iio_dev *indio_dev, .read_raw = &mt6577_auxadc_read_raw, }; +static int mt6577_auxadc_resume(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev); + int ret; + + ret = clk_prepare_enable(adc_dev->adc_clk); + if (ret) { + pr_err("failed to enable auxadc clock\n"); + return ret; + } + + mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC, + MT6577_AUXADC_PDN_EN, 0); + mdelay(MT6577_AUXADC_POWER_READY_MS); + + return 0; +} + +static int mt6577_auxadc_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev); + + mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC, + 0, MT6577_AUXADC_PDN_EN); + clk_disable_unprepare(adc_dev->adc_clk); + + return 0; +} + static int mt6577_auxadc_probe(struct platform_device *pdev) { struct mt6577_auxadc_device *adc_dev; @@ -269,6 +300,11 @@ static int mt6577_auxadc_remove(struct platform_device *pdev) return 0; } +static const struct dev_pm_ops mt6577_auxadc_pm_ops = { + .suspend = mt6577_auxadc_suspend, + .resume = mt6577_auxadc_resume, +}; + static const struct of_device_id mt6577_auxadc_of_match[] = { { .compatible = "mediatek,mt2701-auxadc", }, { .compatible = "mediatek,mt8173-auxadc", }, @@ -280,6 +316,7 @@ static int mt6577_auxadc_remove(struct platform_device *pdev) .driver = { .name = "mt6577-auxadc", .of_match_table = mt6577_auxadc_of_match, + .pm = &mt6577_auxadc_pm_ops, }, .probe = mt6577_auxadc_probe, .remove = mt6577_auxadc_remove, -- 1.7.9.5