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tegra: fdt: i2c: Add extra I2C bindings for U-Boot

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Add U-Boot's peripheral clock information to the Tegra20 device tree file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Simon Glass 2012-03-06 19:00:22 +00:00 committed by Albert ARIBAUD
parent 3682cc3d2c
commit 34fa833aee
2 changed files with 32 additions and 1 deletions
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10
arch/arm/dts/tegra20.dtsi
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@ -34,6 +34,8 @@
compatible = "nvidia,tegra20-i2c";
reg = <0x7000C000 0x100>;
interrupts = < 70 >;
/* PERIPH_ID_I2C1, PLL_P_OUT3 */
clocks = <&tegra_car 12>, <&tegra_car 124>;
};
i2c@7000c400 {
@ -42,6 +44,8 @@
compatible = "nvidia,tegra20-i2c";
reg = <0x7000C400 0x100>;
interrupts = < 116 >;
/* PERIPH_ID_I2C2, PLL_P_OUT3 */
clocks = <&tegra_car 54>, <&tegra_car 124>;
};
i2c@7000c500 {
@ -50,14 +54,18 @@
compatible = "nvidia,tegra20-i2c";
reg = <0x7000C500 0x100>;
interrupts = < 124 >;
/* PERIPH_ID_I2C3, PLL_P_OUT3 */
clocks = <&tegra_car 67>, <&tegra_car 124>;
};
i2c@7000d000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "nvidia,tegra20-i2c";
compatible = "nvidia,tegra20-i2c-dvc";
reg = <0x7000D000 0x200>;
interrupts = < 85 >;
/* PERIPH_ID_DVC_I2C, PLL_P_OUT3 */
clocks = <&tegra_car 47>, <&tegra_car 124>;
};
i2s@70002800 {

23
doc/device-tree-bindings/i2c/tegra20-i2c.txt Normal file
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@ -0,0 +1,23 @@
(Placeholder note while we locate the kernel Tegra20 bindings)
Added in U-Boot:
Required properties:
- clocks : Two clocks must be given, each as a phandle to the Tegra's
CAR node and the clock number as a parameter:
- the I2C clock to use for the peripheral
- the pll_p_out3 clock, which can be used for fast operation. This
does not change and is the same for all I2C nodes.
Example:
(TODO: merge with existing example):
i2c@7000c400 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "nvidia,tegra20-i2c";
reg = <0x7000C400 0x100>;
interrupts = < 116 >;
/* PERIPH_ID_I2C2, PLL_P_OUT3 */
clocks = <&tegra_car 54>, <&tegra_car 124>;
};