From patchwork Thu Aug 21 16:12:01 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nishanth Menon X-Patchwork-Id: 4759171 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 4DE1EC0338 for ; Thu, 21 Aug 2014 16:13:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7A79520172 for ; Thu, 21 Aug 2014 16:13:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8D64420160 for ; Thu, 21 Aug 2014 16:13:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752486AbaHUQNQ (ORCPT ); Thu, 21 Aug 2014 12:13:16 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:36471 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752054AbaHUQNO (ORCPT ); Thu, 21 Aug 2014 12:13:14 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id s7LGC4J9015264; Thu, 21 Aug 2014 11:12:04 -0500 Received: from DLEE70.ent.ti.com (dlee70.ent.ti.com [157.170.170.113]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s7LGC4BT004093; Thu, 21 Aug 2014 11:12:04 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.3.174.1; Thu, 21 Aug 2014 11:12:04 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id s7LGC44f028617; Thu, 21 Aug 2014 11:12:04 -0500 From: Nishanth Menon To: Alessandro Zummo CC: , Tony Lindgren , , , Nishanth Menon Subject: [PATCH] drivers/rtc/rtc-ds1307.c: Support optional wakeup interrupt source Date: Thu, 21 Aug 2014 11:12:01 -0500 Message-ID: <1408637521-6764-1-git-send-email-nm@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP With the recent pinctrl-single changes, SoCs such as Texas Instrument's OMAP processors can treat wake-up events from deeper idle states as interrupts. Let's add support for the optional second interrupt for wake-up events. And then SoC can wakeup and handle the event using it's regular handler. Finally, to pass the wake-up interrupt in the dts file, interrupts-extended property needs to be passed. This is similar in approach to commit 2a0b965cfb6e ("serial: omap: Add support for optional wake-up") Signed-off-by: Nishanth Menon --- drivers/rtc/rtc-ds1307.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index f03d5ba..5feedfc 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -15,6 +15,8 @@ #include #include #include +#include +#include #include #include #include @@ -115,6 +117,7 @@ struct ds1307 { struct i2c_client *client; struct rtc_device *rtc; struct work_struct work; + int wakeirq; s32 (*read_block_data)(const struct i2c_client *client, u8 command, u8 length, u8 *values); s32 (*write_block_data)(const struct i2c_client *client, u8 command, @@ -835,6 +838,34 @@ ds1307_nvram_write(struct file *filp, struct kobject *kobj, /*----------------------------------------------------------------------*/ +static int ds1307_i2c_suspend(struct i2c_client *client, pm_message_t mesg) +{ + struct ds1307 *ds1307 = i2c_get_clientdata(client); + struct device *dev = &client->dev; + + if (!ds1307->wakeirq) + return 0; + + if (device_may_wakeup(dev)) + enable_irq(ds1307->wakeirq); + + return 0; +} + +static int ds1307_i2c_resume(struct i2c_client *client) +{ + struct ds1307 *ds1307 = i2c_get_clientdata(client); + struct device *dev = &client->dev; + + if (!ds1307->wakeirq) + return 0; + + if (device_may_wakeup(dev)) + disable_irq_nosync(ds1307->wakeirq); + + return 0; +} + static int ds1307_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -1116,6 +1147,8 @@ read_rtc: } if (want_irq) { + struct device_node *node = client->dev.of_node; + err = request_irq(client->irq, ds1307_irq, IRQF_SHARED, ds1307->rtc->name, client); if (err) { @@ -1125,6 +1158,28 @@ read_rtc: set_bit(HAS_ALARM, &ds1307->flags); dev_dbg(&client->dev, "got IRQ %d\n", client->irq); + if (node) + ds1307->wakeirq = irq_of_parse_and_map(node, 1); + + if (ds1307->wakeirq <= 0) + ds1307->wakeirq = 0; + else + err = devm_request_irq(&client->dev, + ds1307->wakeirq, + ds1307_irq, + IRQF_ONESHOT, + ds1307->rtc->name, + client); + if (err) { + dev_err(&client->dev, "unable to get wakeIRQ %d\n", + err); + free_irq(client->irq, client); + goto exit; + } + + /* We enable the interrupt only during suspend path */ + if (ds1307->wakeirq) + disable_irq_nosync(ds1307->wakeirq); } } @@ -1189,6 +1244,8 @@ static struct i2c_driver ds1307_driver = { }, .probe = ds1307_probe, .remove = ds1307_remove, + .suspend = ds1307_i2c_suspend, + .resume = ds1307_i2c_resume, .id_table = ds1307_id, };