linux-kernel - [PATCH 1/8] dt-bindings: scsi: hisi_sas: add an property of signal attenuation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 20 Feb 2018 03:13:24 +0800
From:   John Garry <john.garry@...wei.com>
To:     <jejb@...ux.vnet.ibm.com>, <martin.petersen@...cle.com>,
        <robh+dt@...nel.org>, <mark.rutland@....com>
CC:     <linux-scsi@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linuxarm@...wei.com>, <linux-kernel@...r.kernel.org>,
        Xiaofei Tan <tanxiaofei@...wei.com>,
        John Garry <john.garry@...wei.com>
Subject: [PATCH 1/8] dt-bindings: scsi: hisi_sas: add an property of signal attenuation

From: Xiaofei Tan <tanxiaofei@...wei.com>

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, signal-attenuation, which
is used to describe the signal attenuation of an board.

Cc: Rob Herring <robh+dt@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Signed-off-by: Xiaofei Tan <tanxiaofei@...wei.com>
Signed-off-by: John Garry <john.garry@...wei.com>
---
 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..bd32ecd 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.
+ - 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@...00000 {
-- 
1.9.1