Add U-Boot's peripheral clock information to the Tegra20 device tree file.
Signed-off-by: Simon Glass sjg@chromium.org --- Changes in v2: - Adjust definitions to fit new peripheral clock bindings - Change 'speed' to 'clock-frequency' - Remove u-boot,pinmux binding (sadly)
Changes in v3: - Move speed setting from tegra20.dtsi to board .dts file
Changes in v4: - Update to use new tegra2 clock and reset binding
Changes in v5: - Add clock binding file which lists our additions to the Linux binding - Add pll_p_out3 to clock binding definition
arch/arm/dts/tegra20.dtsi | 10 +++++++++- doc/device-tree-bindings/i2c/tegra20-i2c.txt | 23 +++++++++++++++++++++++ 2 files changed, 32 insertions(+), 1 deletions(-) create mode 100644 doc/device-tree-bindings/i2c/tegra20-i2c.txt
diff --git a/arch/arm/dts/tegra20.dtsi b/arch/arm/dts/tegra20.dtsi index d6bc9f1..d5ca02c 100644 --- a/arch/arm/dts/tegra20.dtsi +++ b/arch/arm/dts/tegra20.dtsi @@ -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 { diff --git a/doc/device-tree-bindings/i2c/tegra20-i2c.txt b/doc/device-tree-bindings/i2c/tegra20-i2c.txt new file mode 100644 index 0000000..d601c17 --- /dev/null +++ b/doc/device-tree-bindings/i2c/tegra20-i2c.txt @@ -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>; + };