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serial: max310x: Document clock setup 

As a kernel newcomer, I got bitten by lack of examples on this front. I
had troubles figuring out where these clocks could be defined ("/clocks"
is where the generic infrastructure expects them).

One should also ensure that a unique name is used. Generic names such as
"osc" tend to be already used by some board-wide clock crystals.

Signed-off-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jan Kundrát 2017-12-09 00:54:33 +01:00 committed by Greg Kroah-Hartman
parent 78be70c824
commit b2497c1a7d
1 changed files with 15 additions and 1 deletions
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16
Documentation/devicetree/bindings/serial/maxim,max310x.txt
View File

@ -24,13 +24,27 @@ Optional properties:
1 = active low. 1 = active low.
Example: Example:
/ {
clocks {
spi_uart_clk: osc_max14830 {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <3686400>;
};
};
};
&spi0 {
max14830: max14830@0 { max14830: max14830@0 {
compatible = "maxim,max14830"; compatible = "maxim,max14830";
reg = <0>; reg = <0>;
clocks = <&clk20m>; clocks = <&spi_uart_clk>;
clock-names = "osc"; clock-names = "osc";
interrupt-parent = <&gpio3>; interrupt-parent = <&gpio3>;
interrupts = <7 IRQ_TYPE_LEVEL_LOW>; interrupts = <7 IRQ_TYPE_LEVEL_LOW>;
gpio-controller; gpio-controller;
#gpio-cells = <2>; #gpio-cells = <2>;
}; };
};