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ARM: dt: tegra: seaboard: instantiate pinctrl-based I2C bus mux 

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 <swarren@nvidia.com>
hifive-unleashed-5.1
Stephen Warren 2012-04-16 17:41:17 -06:00
parent c80efbae6a
commit a18cf6dcbf
1 changed files with 64 additions and 11 deletions
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75
arch/arm/boot/dts/tegra20-seaboard.dts
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@ -64,11 +64,6 @@
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";
@ -129,14 +124,14 @@
"lspi", "lvp1", "lvs";
nvidia,function = "displaya";
};
owc {
nvidia,pins = "owc", "spdi", "spdo", "uac";
nvidia,function = "rsvd2";
};
pmc {
nvidia,pins = "pmc";
nvidia,function = "pwr_on";
};
pta {
nvidia,pins = "pta";
nvidia,function = "i2c2";
};
rm {
nvidia,pins = "rm";
nvidia,function = "i2c1";
@ -176,7 +171,7 @@
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",
@ -185,7 +180,7 @@
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>;
@ -255,6 +250,39 @@
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";
};
};
state_i2cmux_idle: pinmux_i2cmux_idle {
ddc {
nvidia,pins = "ddc";
nvidia,function = "rsvd4";
};
pta {
nvidia,pins = "pta";
nvidia,function = "rsvd4";
};
};
};
i2s@70002800 {
@ -312,6 +340,31 @@
};
};
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@7000c500 {
status = "okay";
clock-frequency = <400000>;