From patchwork Tue Dec 23 20:49:46 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antti Palosaari X-Patchwork-Id: 5535481 Return-Path: X-Original-To: patchwork-linux-media@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 09F79BEEA8 for ; Tue, 23 Dec 2014 21:06:04 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3A05520121 for ; Tue, 23 Dec 2014 21:06:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 62CCF2011D for ; Tue, 23 Dec 2014 21:06:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932191AbaLWVFy (ORCPT ); Tue, 23 Dec 2014 16:05:54 -0500 Received: from mail.kapsi.fi ([217.30.184.167]:35257 "EHLO mail.kapsi.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756544AbaLWVFx (ORCPT ); Tue, 23 Dec 2014 16:05:53 -0500 Received: from dyn3-82-128-190-202.psoas.suomi.net ([82.128.190.202] helo=localhost.localdomain.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.72) (envelope-from ) id 1Y3WPb-0004tE-87; Tue, 23 Dec 2014 22:50:35 +0200 From: Antti Palosaari To: linux-media@vger.kernel.org Cc: Antti Palosaari Subject: [PATCH 53/66] rtl2832: implement sleep Date: Tue, 23 Dec 2014 22:49:46 +0200 Message-Id: <1419367799-14263-53-git-send-email-crope@iki.fi> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1419367799-14263-1-git-send-email-crope@iki.fi> References: <1419367799-14263-1-git-send-email-crope@iki.fi> X-SA-Exim-Connect-IP: 82.128.190.202 X-SA-Exim-Mail-From: crope@iki.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_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 Put demod to soft reset in order to save power when sleep. That drops power usage ~30mA @5V on USB dongle I tested. In real life it does not matter much as USB IF powers off demod too, but now it is done twice - demod and USB IF. Signed-off-by: Antti Palosaari --- drivers/media/dvb-frontends/rtl2832.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/media/dvb-frontends/rtl2832.c b/drivers/media/dvb-frontends/rtl2832.c index 70fdce4..e620a61 100644 --- a/drivers/media/dvb-frontends/rtl2832.c +++ b/drivers/media/dvb-frontends/rtl2832.c @@ -410,13 +410,23 @@ static int rtl2832_sleep(struct dvb_frontend *fe) { struct rtl2832_dev *dev = fe->demodulator_priv; struct i2c_client *client = dev->client; + int ret; dev_dbg(&client->dev, "\n"); + dev->sleeping = true; /* stop statistics polling */ cancel_delayed_work_sync(&dev->stat_work); dev->fe_status = 0; + + ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1); + if (ret) + goto err; + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; } static int rtl2832_get_tune_settings(struct dvb_frontend *fe,