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 <[email protected]> --- arch/arm/boot/dts/tegra20-tamonten.dtsi | 69 ++++++++++++++++++++++++++++++--- 1 file changed, 64 insertions(+), 5 deletions(-) diff --git a/arch/arm/boot/dts/tegra20-tamonten.dtsi b/arch/arm/boot/dts/tegra20-tamonten.dtsi index 5b3d8b1..c3540e0 100644 --- a/arch/arm/boot/dts/tegra20-tamonten.dtsi +++ b/arch/arm/boot/dts/tegra20-tamonten.dtsi @@ -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"; -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
