From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1F44C3279B for ; Sat, 30 Jun 2018 10:33:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A200A23D2D for ; Sat, 30 Jun 2018 10:33:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="AMDcKoKY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A200A23D2D Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=ti.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030383AbeF3Kdk (ORCPT ); Sat, 30 Jun 2018 06:33:40 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:35474 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936968AbeF3Kcx (ORCPT ); Sat, 30 Jun 2018 06:32:53 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id w5UAWodw083312; Sat, 30 Jun 2018 05:32:50 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1530354770; bh=8fi/71q/obnfhJODoFaw6CTlI1k6NEwEsZbpjNO63ww=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=AMDcKoKYHvLMLa6sImnS0+b4xXu4PmqQf76Yop8NAF9C/E1R0N7yIEJn8Fd0Ksu4r ZXshdIDzq9w5fawgBS+Jvi0v95lz/IEZZVFQa/TabVc1opKrXYuitoVErF6szHj5Ry yhMtzPEtJfvdMk+MgcDu9dmdahmzYLK0y4Ryg5b0= Received: from DLEE108.ent.ti.com (dlee108.ent.ti.com [157.170.170.38]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id w5UAWoFG020290; Sat, 30 Jun 2018 05:32:50 -0500 Received: from DLEE104.ent.ti.com (157.170.170.34) by DLEE108.ent.ti.com (157.170.170.38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1466.3; Sat, 30 Jun 2018 05:32:50 -0500 Received: from dflp33.itg.ti.com (10.64.6.16) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1466.3 via Frontend Transport; Sat, 30 Jun 2018 05:32:50 -0500 Received: from a0132425.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id w5UAWd6V013640; Sat, 30 Jun 2018 05:32:48 -0500 From: Vignesh R To: Jonathan Cameron , Dmitry Torokhov , Lee Jones CC: Vignesh R , , , , Subject: [PATCH 3/5] mfd: ti_am335x_tscadc: Keep ADC interface on if child is wakeup capable Date: Sat, 30 Jun 2018 16:03:16 +0530 Message-ID: <20180630103318.25355-4-vigneshr@ti.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180630103318.25355-1-vigneshr@ti.com> References: <20180630103318.25355-1-vigneshr@ti.com> MIME-Version: 1.0 Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If a child device like touchscreen is wakeup capable, then keep ADC interface on, so that a touching resistive screen will generate wakeup event to the system. Signed-off-by: Vignesh R --- drivers/mfd/ti_am335x_tscadc.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c index 858c1a071a81..c21ed54d1662 100644 --- a/drivers/mfd/ti_am335x_tscadc.c +++ b/drivers/mfd/ti_am335x_tscadc.c @@ -294,11 +294,24 @@ static int ti_tscadc_remove(struct platform_device *pdev) return 0; } +static int __maybe_unused ti_tscadc_can_wakeup(struct device *dev, void *data) +{ + return device_may_wakeup(dev); +} + static int __maybe_unused tscadc_suspend(struct device *dev) { struct ti_tscadc_dev *tscadc = dev_get_drvdata(dev); regmap_write(tscadc->regmap, REG_SE, 0x00); + if (device_for_each_child(dev, NULL, ti_tscadc_can_wakeup)) { + u32 ctrl; + + regmap_read(tscadc->regmap, REG_CTRL, &ctrl); + ctrl &= ~(CNTRLREG_POWERDOWN); + ctrl |= CNTRLREG_TSCSSENB; + regmap_write(tscadc->regmap, REG_CTRL, ctrl); + } pm_runtime_put_sync(dev); return 0; -- 2.18.0