From: Linus Walleij <linus.walleij@linaro.org>
To: Rob Herring <robh+dt@kernel.org>,
devicetree@vger.kernel.org, Jens Axboe <axboe@kernel.dk>
Cc: linux-ide@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>,
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Subject: [PATCH v4] dt-bindings: Create DT bindings for SATA controllers
Date: Sun, 12 Jan 2020 12:17:51 +0100 [thread overview]
Message-ID: <20200112111751.21984-1-linus.walleij@linaro.org> (raw)
I need to create subnodes for drives connected to SATA
host controllers, and this needs to be supported
generally, so create a common YAML binding for
"sata" that will support subnodes with ports.
This has been designed as a subset of
ata/ahci-platform.txt with the bare essentials and
should be possible to extend or superset to cover the
common bindings.
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v3->v4:
- Drop any master/slave terminology: SATA has one drive
per port or up to 15 drives behind a multiplexer.
- Drop RFC notation, this feels pretty finished.
ChangeLog v2->v3:
- Split off into its own RFC patch
- Only support sata-port@ in this binding
- Opt to support devices 0..14 on the sata-port in
line with ahci-platforn.txt not modeling the port
multiplier in the device tree at all.
ChangeLog v1->v2:
- Use ide@ and sata@ as node names.
- Use ide-port@ and sata-port@ for the ports toward the
drives, rather than letting the subnodes be the drives
themselves.
---
.../devicetree/bindings/ata/sata-common.yaml | 50 +++++++++++++++++++
1 file changed, 50 insertions(+)
create mode 100644 Documentation/devicetree/bindings/ata/sata-common.yaml
diff --git a/Documentation/devicetree/bindings/ata/sata-common.yaml b/Documentation/devicetree/bindings/ata/sata-common.yaml
new file mode 100644
index 000000000000..41f590629fbf
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/sata-common.yaml
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ata/sata-common.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common Properties for Serial AT attachment (SATA) controllers
+
+maintainers:
+ - Linus Walleij <linus.walleij@linaro.org>
+
+description: |
+ This document defines device tree properties common to most Serial
+ AT attachment (SATA) storage devices. It doesn't constitute a device tree
+ binding specification by itself but is meant to be referenced by device
+ tree bindings.
+
+ The SATA controller-specific device tree bindings are responsible for
+ defining whether each property is required or optional.
+
+properties:
+ $nodename:
+ pattern: "^sata(@.*)?$"
+ description:
+ Specifies the host controller node. SATA host controller nodes are named
+ "sata"
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+patternProperties:
+ "^sata-port@[0-1]$":
+ description: |
+ DT nodes for ports connected on the SATA host. The SATA port
+ nodes will be named "sata-port".
+ type: object
+
+ properties:
+ reg:
+ minimum: 0
+ maximum: 14
+ description:
+ The ID number of the drive port SATA can potentially use a port
+ multiplier making it possible to connect up to 15 disks to a single
+ SATA port.
+
+...
--
2.21.0
next reply other threads:[~2020-01-12 11:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-12 11:17 Linus Walleij [this message]
2020-01-13 22:53 ` [PATCH v4] dt-bindings: Create DT bindings for SATA controllers Rob Herring
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