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ARM: tegra: tamonten: Add DDC/PTA pinmux 

This commit allows the I2C2 controller on Tegra20 to be routed either to
the DDC or the PTA pin group at runtime. On Tamonten this allows the I2C
bus to be used for the DDC of the HDMI connector or to access I2C chips
on the carrier board.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
hifive-unleashed-5.1
Thierry Reding 2012-11-09 14:04:50 +01:00 committed by Stephen Warren
parent c42cb1c379
commit ec31990372
1 changed files with 64 additions and 5 deletions
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69
arch/arm/boot/dts/tegra20-tamonten.dtsi
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@ -62,10 +62,6 @@
nvidia,pins = "dap4";
nvidia,function = "dap4";
};
ddc {
nvidia,pins = "ddc";
nvidia,function = "i2c2";
};
dta {
nvidia,pins = "dta", "dtd";
nvidia,function = "sdio2";
@ -91,7 +87,7 @@
nvidia,function = "pcie";
};
hdint {
nvidia,pins = "hdint", "pta";
nvidia,pins = "hdint";
nvidia,function = "hdmi";
};
i2cp {
@ -230,6 +226,39 @@
nvidia,pull = <1>;
};
};
state_i2cmux_ddc: pinmux_i2cmux_ddc {
ddc {
nvidia,pins = "ddc";
nvidia,function = "i2c2";
};
pta {
nvidia,pins = "pta";
nvidia,function = "rsvd4";
};
};
state_i2cmux_pta: pinmux_i2cmux_pta {
ddc {
nvidia,pins = "ddc";
nvidia,function = "rsvd4";
};
pta {
nvidia,pins = "pta";
nvidia,function = "i2c2";
};
};
state_i2cmux_idle: pinmux_i2cmux_idle {
ddc {
nvidia,pins = "ddc";
nvidia,function = "rsvd4";
};
pta {
nvidia,pins = "pta";
nvidia,function = "rsvd4";
};
};
};
i2s@70002800 {
@ -246,6 +275,36 @@
status = "okay";
};
i2c@7000c400 {
clock-frequency = <100000>;
status = "okay";
};
i2cmux {
compatible = "i2c-mux-pinctrl";
#address-cells = <1>;
#size-cells = <0>;
i2c-parent = <&{/i2c@7000c400}>;
pinctrl-names = "ddc", "pta", "idle";
pinctrl-0 = <&state_i2cmux_ddc>;
pinctrl-1 = <&state_i2cmux_pta>;
pinctrl-2 = <&state_i2cmux_idle>;
i2c@0 {
reg = <0>;
#address-cells = <1>;
#size-cells = <0>;
};
i2c@1 {
reg = <1>;
#address-cells = <1>;
#size-cells = <0>;
};
};
i2c@7000d000 {
clock-frequency = <400000>;
status = "okay";