From: Xiubo Li <Li.Xiubo@freescale.com>
To: <broonie@kernel.org>, <rob@landley.net>
Cc: <robh+dt@kernel.org>, <pawel.moll@arm.com>,
<mark.rutland@arm.com>, <ijc+devicetree@hellion.org.uk>,
<galak@codeaurora.org>, <linux-doc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, Xiubo Li <Li.Xiubo@freescale.com>
Subject: [PATCHv2 2/3] regmap: Add the DT binding documentation for endianness
Date: Wed, 23 Apr 2014 14:46:34 +0800 [thread overview]
Message-ID: <1398235595-13370-3-git-send-email-Li.Xiubo@freescale.com> (raw)
In-Reply-To: <1398235595-13370-1-git-send-email-Li.Xiubo@freescale.com>
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
---
.../bindings/regmap/regmap-endianness.txt | 48 ++++++++++++++++++++++
1 file changed, 48 insertions(+)
create mode 100644 Documentation/devicetree/bindings/regmap/regmap-endianness.txt
diff --git a/Documentation/devicetree/bindings/regmap/regmap-endianness.txt b/Documentation/devicetree/bindings/regmap/regmap-endianness.txt
new file mode 100644
index 0000000..1d838c5
--- /dev/null
+++ b/Documentation/devicetree/bindings/regmap/regmap-endianness.txt
@@ -0,0 +1,48 @@
+Device-Tree bindings for regmap endianness
+
+Required properties:
+- regmap-reg-endian: register endianness, see ../endianness/endianness.txt
+ for detail.
+- regmap-val-endian: value endianness, see ../endianness/endianness.txt for
+ detail.
+
+The Endianness flags supported by regmap:
+DT properties Macros
+----------------------------------------
+ 'le' REGMAP_ENDIAN_LITTLE
+ 'be' REGMAP_ENDIAN_BIG
+ 'native' REGMAP_ENDIAN_NATIVE
+ Absent REGMAP_ENDIAN_DEFAULT
+
+Examples for using the regmap-mmio:
+Scenario 1 : CPU in LE mode & device in LE mode.
+dev: dev@40031000 {
+ compatible = "name";
+ reg = <0x40031000 0x1000>;
+ ...
+ regmap-val-endian = 'native'; or just absent.
+};
+
+Scenario 2 : CPU in LE mode & device in BE mode.
+dev: dev@40031000 {
+ compatible = "name";
+ reg = <0x40031000 0x1000>;
+ ...
+ regmap-val-endian = 'be';
+};
+
+Scenario 3 : CPU in BE mode & device in BE mode.
+dev: dev@40031000 {
+ compatible = "name";
+ reg = <0x40031000 0x1000>;
+ ...
+ regmap-val-endian = 'native'; or just absent.
+};
+
+Scenario 4 : CPU in BE mode & device in LE mode.
+dev: dev@40031000 {
+ compatible = "name";
+ reg = <0x40031000 0x1000>;
+ ...
+ regmap-val-endian = 'le';
+};
--
1.8.4
next prev parent reply other threads:[~2014-04-23 7:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-23 6:46 [PATCHv2 0/3] add DT endianness binding support Xiubo Li
2014-04-23 6:46 ` [PATCHv2 1/3] dt/bindings: Add the DT binding documentation for endianness Xiubo Li
2014-04-23 8:34 ` Mark Rutland
2014-04-30 5:08 ` Li.Xiubo
2014-04-23 6:46 ` Xiubo Li [this message]
2014-04-23 8:40 ` [PATCHv2 2/3] regmap: " Mark Rutland
2014-04-28 8:52 ` Li.Xiubo
2014-04-23 6:46 ` [PATCHv2 3/3] regmap: add DT endianness binding support Xiubo Li
-- strict thread matches above, loose matches on Subject: below --
2014-04-02 10:09 [PATCHv2 0/3] regmap: add LE and DT binding for endianness Xiubo Li
2014-04-02 10:09 ` [PATCHv2 2/3] regmap: Add the DT binding documentation " Xiubo Li
2014-04-02 19:48 ` Mark Brown
2014-04-03 7:04 ` Li.Xiubo
2014-04-14 21:09 ` Mark Brown
2014-04-23 5:08 ` Li.Xiubo
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