From patchwork Wed Mar 7 12:25:05 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 10263883 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 774AC602BD for ; Wed, 7 Mar 2018 12:26:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6573E294DD for ; Wed, 7 Mar 2018 12:26:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5881F294E5; Wed, 7 Mar 2018 12:26:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CC348294DD for ; Wed, 7 Mar 2018 12:26:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933106AbeCGM0d (ORCPT ); Wed, 7 Mar 2018 07:26:33 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:6170 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754173AbeCGM0G (ORCPT ); Wed, 7 Mar 2018 07:26:06 -0500 Received: from DGGEMS412-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id E815FC0AF89B7; Wed, 7 Mar 2018 20:25:42 +0800 (CST) Received: from localhost.localdomain (10.67.212.75) by DGGEMS412-HUB.china.huawei.com (10.3.19.212) with Microsoft SMTP Server id 14.3.361.1; Wed, 7 Mar 2018 20:25:34 +0800 From: John Garry To: , , , , CC: , , , , Xiaofei Tan , John Garry Subject: [PATCH v4 01/10] dt-bindings: scsi: hisi_sas: add an property of signal attenuation Date: Wed, 7 Mar 2018 20:25:05 +0800 Message-ID: <1520425514-205565-2-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1520425514-205565-1-git-send-email-john.garry@huawei.com> References: <1520425514-205565-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.212.75] X-CFilter-Loop: Reflected Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Xiaofei Tan For some new boards with hip07 chipset we are required to set PHY config registers differently. The hw property which determines how to set these registers is in the PHY signal attenuation readings. This patch add an devicetree property, "hisilicon,signal-attenuation", which is used to describe the signal attenuation of an board. Cc: Rob Herring Cc: Mark Rutland Signed-off-by: Xiaofei Tan Signed-off-by: John Garry Reviewed-by: Rob Herring --- Documentation/devicetree/bindings/scsi/hisilicon-sas.txt | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/scsi/hisilicon-sas.txt b/Documentation/devicetree/bindings/scsi/hisilicon-sas.txt index df3bef7..8c6659e 100644 --- a/Documentation/devicetree/bindings/scsi/hisilicon-sas.txt +++ b/Documentation/devicetree/bindings/scsi/hisilicon-sas.txt @@ -53,6 +53,13 @@ Main node required properties: Optional main node properties: - hip06-sas-v2-quirk-amt : when set, indicates that the v2 controller has the "am-max-transmissions" limitation. + - hisilicon,signal-attenuation : array of 3 32-bit values, containing de-emphasis, + preshoot, and boost attenuation readings for the board. They + are used to describe the signal attenuation of the board. These + values' range is 7600 to 12400, and used to represent -24dB to + 24dB. + The formula is "y = (x-10000)/10000". For example, 10478 + means 4.78dB. Example: sas0: sas@c1000000 {