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From: John Garry <john.garry@huawei.com>
To: <jejb@linux.vnet.ibm.com>, <martin.petersen@oracle.com>,
	<robh+dt@kernel.org>, <mark.rutland@arm.com>, <hare@suse.de>
Cc: <linux-scsi@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <linuxarm@huawei.com>,
	Xiaofei Tan <tanxiaofei@huawei.com>,
	John Garry <john.garry@huawei.com>
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	[thread overview]
Message-ID: <1520425514-205565-2-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1520425514-205565-1-git-send-email-john.garry@huawei.com>

From: Xiaofei Tan <tanxiaofei@huawei.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, "hisilicon,signal-attenuation",
which is used to describe the signal attenuation of an board.

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

WARNING: multiple messages have this Message-ID (diff)
From: John Garry <john.garry@huawei.com>
To: jejb@linux.vnet.ibm.com, martin.petersen@oracle.com,
	robh+dt@kernel.org, mark.rutland@arm.com, hare@suse.de
Cc: linux-scsi@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linuxarm@huawei.com,
	Xiaofei Tan <tanxiaofei@huawei.com>,
	John Garry <john.garry@huawei.com>
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	[thread overview]
Message-ID: <1520425514-205565-2-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1520425514-205565-1-git-send-email-john.garry@huawei.com>

From: Xiaofei Tan <tanxiaofei@huawei.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, "hisilicon,signal-attenuation",
which is used to describe the signal attenuation of an board.

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

  reply	other threads:[~2018-03-07 12:26 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-07 12:25 [PATCH v4 0/10] hisi_sas: support x6000 board and some misc changes John Garry
2018-03-07 12:25 ` John Garry
2018-03-07 12:25 ` John Garry [this message]
2018-03-07 12:25   ` [PATCH v4 01/10] dt-bindings: scsi: hisi_sas: add an property of signal attenuation John Garry
2018-03-08  2:34   ` Rob Herring
2018-03-07 12:25 ` [PATCH v4 02/10] scsi: hisi_sas: support the property of signal attenuation for v2 hw John Garry
2018-03-07 12:25   ` John Garry
2018-03-07 12:25 ` [PATCH v4 03/10] scsi: hisi_sas: fix the issue of link rate inconsistency John Garry
2018-03-07 12:25   ` John Garry
2018-03-07 12:25 ` [PATCH v4 04/10] scsi: hisi_sas: fix the issue of setting linkrate register John Garry
2018-03-07 12:25   ` John Garry
2018-03-07 12:25 ` [PATCH v4 05/10] scsi: hisi_sas: increase timer expire of internal abort task John Garry
2018-03-07 12:25   ` John Garry
2018-03-07 12:25 ` [PATCH v4 06/10] scsi: hisi_sas: remove unused variable hisi_sas_devices.running_req John Garry
2018-03-07 12:25   ` John Garry
2018-03-07 12:25 ` [PATCH v4 07/10] scsi: hisi_sas: fix return value of hisi_sas_task_prep() John Garry
2018-03-07 12:25   ` John Garry
2018-03-07 12:25 ` [PATCH v4 08/10] scsi: hisi_sas: Code cleanup and minor bug fixes John Garry
2018-03-07 12:25   ` John Garry
2018-03-07 12:25 ` [PATCH v4 09/10] scsi: hisi_sas: modify some register config for hip08 John Garry
2018-03-07 12:25   ` John Garry
2018-03-07 12:25 ` [PATCH v4 10/10] scsi: hisi_sas: add v3 hw MODULE_DEVICE_TABLE() John Garry
2018-03-07 12:25   ` John Garry
2018-03-13  1:59 ` [PATCH v4 0/10] hisi_sas: support x6000 board and some misc changes Martin K. Petersen
2018-03-13  1:59   ` Martin K. Petersen

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