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ARM: kirkwood: fdt: define uart[01] as disabled, enable uart0 

Define both uarts in kirkwood.dtsi as they are common to all kirkwood
SoCs.  Each board may enable all or none of them, so they are disabled
by default.  uart0 is enabled for the dreamplug.

tclk can vary for each board, so we leave it undefined in the kirkwood
dtsi.  Each board can then set it as appropriate when enabling the uart.

Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Jason Cooper 2012-03-15 01:00:27 +00:00
parent 6fa6b8781f
commit 163f2cea67
2 changed files with 30 additions and 7 deletions
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11
arch/arm/boot/dts/kirkwood-dreamplug.dts
View File

@ -15,11 +15,10 @@
bootargs = "console=ttyS0,115200n8 earlyprintk";
};
serial@f1012000 {
compatible = "ns16550a";
reg = <0xf1012000 0x100>;
reg-shift = <2>;
interrupts = <33>;
clock-frequency = <200000000>;
ocp@f1000000 {
serial@12000 {
clock-frequency = <200000000>;
status = "ok";
};
};
};

26
arch/arm/boot/dts/kirkwood.dtsi
View File

@ -2,5 +2,29 @@
/ {
compatible = "mrvl,kirkwood";
};
ocp@f1000000 {
compatible = "simple-bus";
ranges = <0 0xf1000000 0x1000000>;
#address-cells = <1>;
#size-cells = <1>;
serial@12000 {
compatible = "ns16550a";
reg = <0x12000 0x100>;
reg-shift = <2>;
interrupts = <33>;
/* set clock-frequency in board dts */
status = "disabled";
};
serial@12100 {
compatible = "ns16550a";
reg = <0x12100 0x100>;
reg-shift = <2>;
interrupts = <34>;
/* set clock-frequency in board dts */
status = "disabled";
};
};
};