From patchwork Fri Mar 27 11:57:15 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Olli Salonen X-Patchwork-Id: 28994 Received: from mail.tu-berlin.de ([130.149.7.33]) by www.linuxtv.org with esmtp (Exim 4.72) (envelope-from ) id 1YbStN-0000KT-Sk; Fri, 27 Mar 2015 12:57:37 +0100 X-tubIT-Incoming-IP: 209.132.180.67 Received: from vger.kernel.org ([209.132.180.67]) by mail.tu-berlin.de (exim-4.76/mailfrontend-8) with esmtp id 1YbStL-0005f7-lS; Fri, 27 Mar 2015 12:57:37 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752581AbbC0L5d (ORCPT + 1 other); Fri, 27 Mar 2015 07:57:33 -0400 Received: from mail-la0-f49.google.com ([209.85.215.49]:34203 "EHLO mail-la0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752353AbbC0L5d (ORCPT ); Fri, 27 Mar 2015 07:57:33 -0400 Received: by lagg8 with SMTP id g8so68396817lag.1 for ; Fri, 27 Mar 2015 04:57:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id; bh=c+aVhLia0pwujyx6ZCP5mtZNBS2fLBxs8zmExvZ1iP0=; b=R36JKZHlf1TOttKqjxYcfpEu7XfRLtUciBPx3/6ZpaoVGtUrUGE8OdWBhp47WZDsOk 3LMyNOFCmoftM+YndzvEHerKpPTJvsH/rLnnIIvmzTRga5Z2/GkyURwFbUeBUctKvjcF NAWvYvlE+VDcajiLCms8Vbfr27zbVasjTs6/NDkFlMyuYOx7yCxrHGhajCtHIela47iT VNWDNPTTrSVriNMp0ldYtGkO2sEHYakQfXLlhx8BMACcha+N+7srQPDM1NPtJ8d32wJl o3O550SXOIjSn+E9/HJoZ1mJ7+GbqMT7mbTosTzah2lMOCnAvdtO/zkkkWkSCOL0TDx8 RFFg== X-Gm-Message-State: ALoCoQm/M5BQo7354eJPqvOL35XKlOtX6atjnpZ2y7T+kZ8/HH3MXG0zBbaQkpmZGA8uIUMF5lgf X-Received: by 10.152.8.69 with SMTP id p5mr13645821laa.113.1427457451420; Fri, 27 Mar 2015 04:57:31 -0700 (PDT) Received: from dl160.lan (37-33-50-203.bb.dnainternet.fi. [37.33.50.203]) by mx.google.com with ESMTPSA id y8sm300615lad.46.2015.03.27.04.57.29 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 27 Mar 2015 04:57:30 -0700 (PDT) From: Olli Salonen To: linux-media@vger.kernel.org Cc: Olli Salonen Subject: [PATCH 1/5] saa7164: add support for i2c read Date: Fri, 27 Mar 2015 13:57:15 +0200 Message-Id: <1427457439-1493-1-git-send-email-olli.salonen@iki.fi> X-Mailer: git-send-email 1.9.1 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-PMX-Version: 6.0.0.2142326, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2015.3.27.114524 X-PMX-Spam: Gauge=IIIIIIII, Probability=8%, Report=' HTML_00_01 0.05, HTML_00_10 0.05, BODYTEXTP_SIZE_3000_LESS 0, BODY_SIZE_1300_1399 0, BODY_SIZE_2000_LESS 0, BODY_SIZE_5000_LESS 0, BODY_SIZE_7000_LESS 0, URI_ENDS_IN_HTML 0, __ANY_URI 0, __CP_URI_IN_BODY 0, __HAS_FROM 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __HAS_X_MAILING_LIST 0, __MIME_TEXT_ONLY 0, __SANE_MSGID 0, __STOCK_PHRASE_7 0, __SUBJ_ALPHA_END 0, __TO_MALFORMED_2 0, __TO_NO_NAME 0, __URI_NO_WWW 0, __URI_NS , __YOUTUBE_RCVD 0' Add support for pure I2C reads. Needed by si2157 tuner driver. Signed-off-by: Olli Salonen --- drivers/media/pci/saa7164/saa7164-i2c.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/media/pci/saa7164/saa7164-i2c.c b/drivers/media/pci/saa7164/saa7164-i2c.c index 4f7e3b4..e30e206 100644 --- a/drivers/media/pci/saa7164/saa7164-i2c.c +++ b/drivers/media/pci/saa7164/saa7164-i2c.c @@ -39,9 +39,12 @@ static int i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num) dprintk(DBGLVL_I2C, "%s(num = %d) addr = 0x%02x len = 0x%x\n", __func__, num, msgs[i].addr, msgs[i].len); if (msgs[i].flags & I2C_M_RD) { - /* Unsupported - Yet*/ - printk(KERN_ERR "%s() Unsupported - Yet\n", __func__); - continue; + /* dummy write before read */ + retval = saa7164_api_i2c_read(bus, msgs[i].addr, + 0, NULL, msgs[i].len, msgs[i].buf); + + if (retval < 0) + goto err; } else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) && msgs[i].addr == msgs[i + 1].addr) { /* write then read from same address */