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

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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>
This commit is contained in:
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>;