From: Stephen Warren <[email protected]> Tegra's I2C2 controller can be routed to either the PTA or DDC pin group on Seaboard. Define the pinctrl state nodes required to allow runtime control of this routing. Instantiate a pinctrl-i2cmux I2C bus mux that uses these pinctrl states.
Signed-off-by: Stephen Warren <[email protected]> --- Ben, Wolfram, I'll take this one patch through the Tegra tree at an appropriate time. I'm including it here to give a good example. --- arch/arm/boot/dts/tegra-seaboard.dts | 57 +++++++++++++++++++++++++++++----- 1 files changed, 49 insertions(+), 8 deletions(-) diff --git a/arch/arm/boot/dts/tegra-seaboard.dts b/arch/arm/boot/dts/tegra-seaboard.dts index ed0a2f5..e1025e2 100644 --- a/arch/arm/boot/dts/tegra-seaboard.dts +++ b/arch/arm/boot/dts/tegra-seaboard.dts @@ -65,11 +65,6 @@ nvidia,pins = "dap4"; nvidia,function = "dap4"; }; - ddc { - nvidia,pins = "ddc", "owc", "spdi", "spdo", - "uac"; - nvidia,function = "rsvd2"; - }; dta { nvidia,pins = "dta", "dtb", "dtc", "dtd", "dte"; nvidia,function = "vi"; @@ -100,7 +95,7 @@ }; hdint { nvidia,pins = "hdint", "lpw0", "lpw2", "lsc1", - "lsck", "lsda", "pta"; + "lsck", "lsda"; nvidia,function = "hdmi"; }; i2cp { @@ -130,6 +125,10 @@ "lspi", "lvp1", "lvs"; nvidia,function = "displaya"; }; + owc { + nvidia,pins = "owc", "spdi", "spdo", "uac"; + nvidia,function = "rsvd2"; + }; pmc { nvidia,pins = "pmc"; nvidia,function = "pwr_on"; @@ -173,7 +172,7 @@ conf_ata { nvidia,pins = "ata", "atb", "atc", "atd", "cdev1", "cdev2", "dap1", "dap2", - "dap4", "dtf", "gma", "gmc", "gmd", + "dap4", "ddc", "dtf", "gma", "gmc", "gmd", "gme", "gpu", "gpu7", "i2cp", "irrx", "irtx", "pta", "rm", "sdc", "sdd", "slxd", "slxk", "spdi", "spdo", "uac", @@ -182,7 +181,7 @@ nvidia,tristate = <0>; }; conf_ate { - nvidia,pins = "ate", "csus", "dap3", "ddc", + nvidia,pins = "ate", "csus", "dap3", "gpv", "owc", "slxc", "spib", "spid", "spie"; nvidia,pull = <0>; @@ -252,6 +251,28 @@ nvidia,slew-rate-falling = <3>; }; }; + + 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"; + }; + }; }; i2c@7000c000 { @@ -276,6 +297,26 @@ clock-frequency = <400000>; }; + i2cmux { + compatible = "pinctrl-i2cmux"; + + i2c-parent = <&{/i2c@7000c400}>; + + pinctrl-names = "ddc", "pta"; + pinctrl-0 = <&state_i2cmux_ddc>; + pinctrl-1 = <&state_i2cmux_pta>; + + i2c-bus-ddc { + #address-cells = <1>; + #size-cells = <0>; + }; + + i2c-bus-pta { + #address-cells = <1>; + #size-cells = <0>; + }; + }; + i2c@7000c500 { clock-frequency = <400000>; }; -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
