From: Peter Rosin <peda@axentia.se>
To: <linux-kernel@vger.kernel.org>
Cc: Peter Rosin <peda@axentia.se>, Wolfram Sang <wsa@the-dreams.de>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Guenter Roeck <linux@roeck-us.net>,
"David S. Miller" <davem@davemloft.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Kalle Valo <kvalo@codeaurora.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Emil Velikov <emil.l.velikov@gmail.com>,
<linux-i2c@vger.kernel.org>, <devicetree@vger.kernel.org>,
Crestez Dan Leonard <leonard.crestez@intel.com>
Subject: [PATCH 3/7] dt-bindings: i2c: add support for 'i2c-gate' subnode
Date: Wed, 27 Jul 2016 10:43:26 +0200 [thread overview]
Message-ID: <1469609010-23049-4-git-send-email-peda@axentia.se> (raw)
In-Reply-To: <1469609010-23049-1-git-send-email-peda@axentia.se>
Handle i2c gates similarly to how i2c arbitrators are handled.
This gets rid of a pointless 'reg' property for i2c gates.
I.e. this new and more compact style
some-gate {
i2c-gate {
#address-cells = <1>;
#size-cells = <0>;
some-i2c-device@50 {
reg = <0x50>;
};
};
};
instead of the old
some-gate {
#address-cells = <1>;
#size-cells = <0>;
i2c@0 {
reg = <0>;
#address-cells = <1>;
#size-cells = <0>;
some-i2c-device@50 {
reg = <0x50>;
};
};
};
Signed-off-by: Peter Rosin <peda@axentia.se>
---
Documentation/devicetree/bindings/i2c/i2c-gate.txt | 35 ++++++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 36 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i2c/i2c-gate.txt
diff --git a/Documentation/devicetree/bindings/i2c/i2c-gate.txt b/Documentation/devicetree/bindings/i2c/i2c-gate.txt
new file mode 100644
index 000000000000..78f17892dfc6
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-gate.txt
@@ -0,0 +1,35 @@
+Common i2c gate properties.
+
+- i2c-gate child node
+
+Required properties for the i2c-gate child node:
+- #address-cells = <1>;
+- #size-cells = <0>;
+
+Optional properties for i2c-gate child node:
+- Child nodes conforming to i2c bus binding
+
+
+Example :
+
+ /*
+ An Invensense mpu9150 at address 0x68 featuring an on-chip Asahi
+ Kasei ak8975 compass behind a gate.
+ */
+
+ mpu9150@68 {
+ compatible = "invensense,mpu9150";
+ reg = <0x68>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <18 1>;
+
+ i2c-gate {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ax8975@0c {
+ compatible = "ak,ak8975";
+ reg = <0x0c>;
+ };
+ };
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 543052305a09..0e6cc071c480 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5525,6 +5525,7 @@ F: Documentation/i2c/i2c-topology
F: Documentation/i2c/muxes/
F: Documentation/devicetree/bindings/i2c/i2c-mux*
F: Documentation/devicetree/bindings/i2c/i2c-arb*
+F: Documentation/devicetree/bindings/i2c/i2c-gate*
F: drivers/i2c/i2c-mux.c
F: drivers/i2c/muxes/
F: include/linux/i2c-mux.h
--
2.1.4
next prev parent reply other threads:[~2016-07-27 8:44 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-27 8:43 [PATCH 0/7] devicetree cleanup for i2c muxes/arbs/gates Peter Rosin
2016-07-27 8:43 ` [PATCH 1/7] dt-bindings: i2c: add support for 'i2c-mux' subnode Peter Rosin
2016-07-29 21:17 ` Rob Herring
2016-07-27 8:43 ` [PATCH 2/7] dt-bindings: i2c: add support for 'i2c-arb' subnode Peter Rosin
2016-07-29 21:24 ` Rob Herring
2016-07-27 8:43 ` Peter Rosin [this message]
2016-07-29 21:25 ` [PATCH 3/7] dt-bindings: i2c: add support for 'i2c-gate' subnode Rob Herring
2016-07-31 22:05 ` Peter Rosin
2016-07-27 8:43 ` [PATCH 4/7] dt-bindings: i2c: add bindings for nxp,pca9541 Peter Rosin
2016-07-29 21:27 ` Rob Herring
2016-07-27 8:43 ` [PATCH 5/7] i2c: mux: add support for 'i2c-mux', 'i2c-arb' and 'i2c-gate' DT subnodes Peter Rosin
2016-07-27 8:43 ` [PATCH 6/7] i2c: pca9541: add device tree binding Peter Rosin
2016-07-27 8:43 ` [PATCH 7/7] i2c: pca954x: " Peter Rosin
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