From patchwork Wed Apr 29 16:36:53 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Olli Salonen X-Patchwork-Id: 29378 Received: from mail.tu-berlin.de ([130.149.7.33]) by www.linuxtv.org with esmtp (Exim 4.72) (envelope-from ) id 1YnUzN-0002ka-9q; Wed, 29 Apr 2015 18:37:33 +0200 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-7) with esmtp id 1YnUzL-0002XP-0k; Wed, 29 Apr 2015 18:37:33 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932892AbbD2Qh0 (ORCPT + 1 other); Wed, 29 Apr 2015 12:37:26 -0400 Received: from mail-lb0-f182.google.com ([209.85.217.182]:34766 "EHLO mail-lb0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753636AbbD2QhW (ORCPT ); Wed, 29 Apr 2015 12:37:22 -0400 Received: by lbcga7 with SMTP id ga7so24701194lbc.1 for ; Wed, 29 Apr 2015 09:37:21 -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 :in-reply-to:references; bh=YDsy1SixoDIbfWsBp9hd2eHJi9qBRz8wThnkXAxTJvs=; b=CI7z5pmHA/Va/DgWyAzZ6xutHRGnoOaIjLWvC3veGvmMYaxx6NI6RPAY6DrNk/EZnM JDzj95hYETLT/Z8/wYK3SH/dodxfTRk8XBVX1/Vn+ONmnZNdlYc1FA9+MBYsaCbnUw8W r4SWLvdEb2QVKC18OlPn4j2gqzdvAlNYHcm1rYgdH/kq4g55WhJnXS/SOaIvlV9oJBtW Huu8Prwgem0Vye+Pz7gg3qpvazS9tWzYyAqIxrq4/qL4cNwvZb55VVPp84YFbw76jBcH WWQ4Ol2lBap/nsLHMAP04v/AcmLLorZkx6D6Ti+i2CNkxR5C4dcoP9ZAsRjouAxhcYbw PE9w== X-Gm-Message-State: ALoCoQkxFB04QP/CuDBax3YW61iD6ioB24xGvwtQsKpAFANWnjpsISMpYiTI3BWqIN9MMzGcBCt3 X-Received: by 10.112.148.101 with SMTP id tr5mr20253389lbb.0.1430325441181; Wed, 29 Apr 2015 09:37:21 -0700 (PDT) Received: from dl160.lan (188-67-118-178.bb.dnainternet.fi. [188.67.118.178]) by mx.google.com with ESMTPSA id s5sm6484936lbr.18.2015.04.29.09.37.19 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 29 Apr 2015 09:37:20 -0700 (PDT) From: Olli Salonen To: linux-media@vger.kernel.org Cc: Olli Salonen Subject: [PATCHv2 4/5] rtl28xxu: add I2C read without write Date: Wed, 29 Apr 2015 19:36:53 +0300 Message-Id: <1430325414-9977-4-git-send-email-olli.salonen@iki.fi> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1430325414-9977-1-git-send-email-olli.salonen@iki.fi> References: <1430325414-9977-1-git-send-email-olli.salonen@iki.fi> 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: 2015.4.29.163320 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_1100_1199 0, BODY_SIZE_2000_LESS 0, BODY_SIZE_5000_LESS 0, BODY_SIZE_7000_LESS 0, REFERENCES 0, URI_ENDS_IN_HTML 0, __ANY_URI 0, __CP_URI_IN_BODY 0, __DATE_TZ_RU 0, __HAS_FROM 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __HAS_X_MAILING_LIST 0, __IN_REP_TO 0, __MIME_TEXT_ONLY 0, __REFERENCES 0, __SANE_MSGID 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 I2C read operation without a preceeding write. While here, change the error code to EOPNOTSUPP in case an unsupported I2C operation is attempted. Signed-off-by: Olli Salonen --- drivers/media/usb/dvb-usb-v2/rtl28xxu.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c index f1a7613..5e0c015 100644 --- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c +++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c @@ -232,8 +232,14 @@ static int rtl28xxu_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[], req.data = msg[0].buf; ret = rtl28xxu_ctrl_msg(d, &req); } + } else if (num == 1 && (msg[0].flags & I2C_M_RD)) { + req.value = (msg[0].addr << 1); + req.index = CMD_I2C_DA_RD; + req.size = msg[0].len; + req.data = msg[0].buf; + ret = rtl28xxu_ctrl_msg(d, &req); } else { - ret = -EINVAL; + ret = -EOPNOTSUPP; } err_mutex_unlock: