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authorAnton Arapov <anton@redhat.com>2012-10-29 11:15:37 +0100
committerAnton Arapov <anton@redhat.com>2012-10-29 11:15:37 +0100
commit7d558cd9c7b18e4b16953265aa0da45e63f3b968 (patch)
tree7135d5a810768c9c619346282ee9cfdf1765e225 /Documentation/devicetree/bindings/i2c
parent985ef6b2108ed28ffd5f6630e1e0fce2e2a775f2 (diff)
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fedora kernel: cd394142aac30b5c751f25b517572e2448695641v3.6.3-2f17
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'Documentation/devicetree/bindings/i2c')
-rw-r--r--Documentation/devicetree/bindings/i2c/cavium-i2c.txt34
-rw-r--r--Documentation/devicetree/bindings/i2c/gpio-i2c.txt32
-rw-r--r--Documentation/devicetree/bindings/i2c/i2c-mxs.txt3
-rw-r--r--Documentation/devicetree/bindings/i2c/i2c-ocores.txt33
-rw-r--r--Documentation/devicetree/bindings/i2c/mrvl-i2c.txt19
5 files changed, 120 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/i2c/cavium-i2c.txt b/Documentation/devicetree/bindings/i2c/cavium-i2c.txt
new file mode 100644
index 00000000000..dced82ebe31
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/cavium-i2c.txt
@@ -0,0 +1,34 @@
+* Two Wire Serial Interface (TWSI) / I2C
+
+- compatible: "cavium,octeon-3860-twsi"
+
+ Compatibility with all cn3XXX, cn5XXX and cn6XXX SOCs.
+
+- reg: The base address of the TWSI/I2C bus controller register bank.
+
+- #address-cells: Must be <1>.
+
+- #size-cells: Must be <0>. I2C addresses have no size component.
+
+- interrupts: A single interrupt specifier.
+
+- clock-frequency: The I2C bus clock rate in Hz.
+
+Example:
+ twsi0: i2c@1180000001000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "cavium,octeon-3860-twsi";
+ reg = <0x11800 0x00001000 0x0 0x200>;
+ interrupts = <0 45>;
+ clock-frequency = <100000>;
+
+ rtc@68 {
+ compatible = "dallas,ds1337";
+ reg = <0x68>;
+ };
+ tmp@4c {
+ compatible = "ti,tmp421";
+ reg = <0x4c>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/i2c/gpio-i2c.txt b/Documentation/devicetree/bindings/i2c/gpio-i2c.txt
new file mode 100644
index 00000000000..4f8ec947c6b
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/gpio-i2c.txt
@@ -0,0 +1,32 @@
+Device-Tree bindings for i2c gpio driver
+
+Required properties:
+ - compatible = "i2c-gpio";
+ - gpios: sda and scl gpio
+
+
+Optional properties:
+ - i2c-gpio,sda-open-drain: sda as open drain
+ - i2c-gpio,scl-open-drain: scl as open drain
+ - i2c-gpio,scl-output-only: scl as output only
+ - i2c-gpio,delay-us: delay between GPIO operations (may depend on each platform)
+ - i2c-gpio,timeout-ms: timeout to get data
+
+Example nodes:
+
+i2c@0 {
+ compatible = "i2c-gpio";
+ gpios = <&pioA 23 0 /* sda */
+ &pioA 24 0 /* scl */
+ >;
+ i2c-gpio,sda-open-drain;
+ i2c-gpio,scl-open-drain;
+ i2c-gpio,delay-us = <2>; /* ~100 kHz */
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rv3029c2@56 {
+ compatible = "rv3029c2";
+ reg = <0x56>;
+ };
+};
diff --git a/Documentation/devicetree/bindings/i2c/i2c-mxs.txt b/Documentation/devicetree/bindings/i2c/i2c-mxs.txt
index 1bfc02de1b0..30ac3a0557f 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mxs.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-mxs.txt
@@ -4,6 +4,8 @@ Required properties:
- compatible: Should be "fsl,<chip>-i2c"
- reg: Should contain registers location and length
- interrupts: Should contain ERROR and DMA interrupts
+- clock-frequency: Desired I2C bus clock frequency in Hz.
+ Only 100000Hz and 400000Hz modes are supported.
Examples:
@@ -13,4 +15,5 @@ i2c0: i2c@80058000 {
compatible = "fsl,imx28-i2c";
reg = <0x80058000 2000>;
interrupts = <111 68>;
+ clock-frequency = <100000>;
};
diff --git a/Documentation/devicetree/bindings/i2c/i2c-ocores.txt b/Documentation/devicetree/bindings/i2c/i2c-ocores.txt
new file mode 100644
index 00000000000..c15781f4dc8
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-ocores.txt
@@ -0,0 +1,33 @@
+Device tree configuration for i2c-ocores
+
+Required properties:
+- compatible : "opencores,i2c-ocores"
+- reg : bus address start and address range size of device
+- interrupts : interrupt number
+- clock-frequency : frequency of bus clock in Hz
+- #address-cells : should be <1>
+- #size-cells : should be <0>
+
+Optional properties:
+- reg-shift : device register offsets are shifted by this value
+- reg-io-width : io register width in bytes (1, 2 or 4)
+- regstep : deprecated, use reg-shift above
+
+Example:
+
+ i2c0: ocores@a0000000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "opencores,i2c-ocores";
+ reg = <0xa0000000 0x8>;
+ interrupts = <10>;
+ clock-frequency = <20000000>;
+
+ reg-shift = <0>; /* 8 bit registers */
+ reg-io-width = <1>; /* 8 bit read/write */
+
+ dummy@60 {
+ compatible = "dummy";
+ reg = <0x60>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/i2c/mrvl-i2c.txt b/Documentation/devicetree/bindings/i2c/mrvl-i2c.txt
index b891ee21835..0f7945019f6 100644
--- a/Documentation/devicetree/bindings/i2c/mrvl-i2c.txt
+++ b/Documentation/devicetree/bindings/i2c/mrvl-i2c.txt
@@ -1,4 +1,4 @@
-* I2C
+* Marvell MMP I2C controller
Required properties :
@@ -32,3 +32,20 @@ Examples:
interrupts = <58>;
};
+* Marvell MV64XXX I2C controller
+
+Required properties :
+
+ - reg : Offset and length of the register set for the device
+ - compatible : Should be "marvell,mv64xxx-i2c"
+ - interrupts : The interrupt number
+ - clock-frequency : Desired I2C bus clock frequency in Hz.
+
+Examples:
+
+ i2c@11000 {
+ compatible = "marvell,mv64xxx-i2c";
+ reg = <0x11000 0x20>;
+ interrupts = <29>;
+ clock-frequency = <100000>;
+ };