summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/gpio/gpio-mxs.txt
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-26 12:57:47 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-26 12:57:47 -0700
commit84a442b9a16ee69243ce7fce5d6f6f9c3fbdee68 (patch)
tree332a0c901d8ab2ffb19b8ce14b4b094bf5b08657 /Documentation/devicetree/bindings/gpio/gpio-mxs.txt
parent39b6cc668c5ecc66f6f9c9293ffab681cb6f7065 (diff)
parentdeb88cc3c69975cbd9875ed9fac259b351f6b64d (diff)
Merge tag 'dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull arm-soc device tree conversions (part 2) from Olof Johansson: "These continue the device tree work from part 1, this set is for the tegra, mxs and imx platforms, all of which have dependencies on clock or pinctrl changes submitted earlier." Fix up trivial conflicts due to nearby changes in drivers/{gpio/gpio,i2c/busses/i2c}-mxs.c * tag 'dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (73 commits) ARM: dt: tegra: invert status=disable vs status=okay ARM: dt: tegra: consistent basic property ordering ARM: dt: tegra: sort nodes based on bus order ARM: dt: tegra: remove duplicate device_type property ARM: dt: tegra: consistenly use lower-case for hex constants ARM: dt: tegra: format regs properties consistently ARM: dt: tegra: gpio comment cleanup ARM: dt: tegra: remove unnecessary unit addresses ARM: dt: tegra: whitespace cleanup ARM: dt: tegra cardhu: fix typo in SDHCI node name ARM: dt: tegra: cardhu: register core regulator tps62361 ARM: dt: tegra30.dtsi: Add SMMU node ARM: dt: tegra20.dtsi: Add GART node ARM: dt: tegra30.dtsi: Add Memory Controller(MC) nodes ARM: dt: tegra20.dtsi: Add Memory Controller(MC) nodes ARM: dt: tegra: Add device tree support for AHB ARM: dts: enable audio support for imx28-evk ARM: dts: enable i2c device for imx28-evk i2c: mxs: add device tree probe support ARM: dts: enable mmc for imx28-evk ...
Diffstat (limited to 'Documentation/devicetree/bindings/gpio/gpio-mxs.txt')
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio-mxs.txt87
1 files changed, 87 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-mxs.txt b/Documentation/devicetree/bindings/gpio/gpio-mxs.txt
new file mode 100644
index 00000000000..0c35673f7a3
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-mxs.txt
@@ -0,0 +1,87 @@
+* Freescale MXS GPIO controller
+
+The Freescale MXS GPIO controller is part of MXS PIN controller. The
+GPIOs are organized in port/bank. Each port consists of 32 GPIOs.
+
+As the GPIO controller is embedded in the PIN controller and all the
+GPIO ports share the same IO space with PIN controller, the GPIO node
+will be represented as sub-nodes of MXS pinctrl node.
+
+Required properties for GPIO node:
+- compatible : Should be "fsl,<soc>-gpio". The supported SoCs include
+ imx23 and imx28.
+- interrupts : Should be the port interrupt shared by all 32 pins.
+- gpio-controller : Marks the device node as a gpio controller.
+- #gpio-cells : Should be two. The first cell is the pin number and
+ the second cell is used to specify optional parameters (currently
+ unused).
+- interrupt-controller: Marks the device node as an interrupt controller.
+- #interrupt-cells : Should be 2. The first cell is the GPIO number.
+ The second cell bits[3:0] is used to specify trigger type and level flags:
+ 1 = low-to-high edge triggered.
+ 2 = high-to-low edge triggered.
+ 4 = active high level-sensitive.
+ 8 = active low level-sensitive.
+
+Note: Each GPIO port should have an alias correctly numbered in "aliases"
+node.
+
+Examples:
+
+aliases {
+ gpio0 = &gpio0;
+ gpio1 = &gpio1;
+ gpio2 = &gpio2;
+ gpio3 = &gpio3;
+ gpio4 = &gpio4;
+};
+
+pinctrl@80018000 {
+ compatible = "fsl,imx28-pinctrl", "simple-bus";
+ reg = <0x80018000 2000>;
+
+ gpio0: gpio@0 {
+ compatible = "fsl,imx28-gpio";
+ interrupts = <127>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+
+ gpio1: gpio@1 {
+ compatible = "fsl,imx28-gpio";
+ interrupts = <126>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+
+ gpio2: gpio@2 {
+ compatible = "fsl,imx28-gpio";
+ interrupts = <125>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+
+ gpio3: gpio@3 {
+ compatible = "fsl,imx28-gpio";
+ interrupts = <124>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+
+ gpio4: gpio@4 {
+ compatible = "fsl,imx28-gpio";
+ interrupts = <123>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+};