mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-05 08:26:59 +00:00
3a11c6618e
IDT VersaClock 5 5P49V5925 has 5 clock outputs, 4 fractional dividers. Input clock source can be taken only from external reference clock. Signed-off-by: Vladimir Barinov <vladimir.barinov+renesas@cogentembedded.com> Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
91 lines
1.9 KiB
Text
91 lines
1.9 KiB
Text
Binding for IDT VersaClock 5,6 programmable i2c clock generators.
|
|
|
|
The IDT VersaClock 5 and VersaClock 6 are programmable i2c clock
|
|
generators providing from 3 to 12 output clocks.
|
|
|
|
==I2C device node==
|
|
|
|
Required properties:
|
|
- compatible: shall be one of
|
|
"idt,5p49v5923"
|
|
"idt,5p49v5925"
|
|
"idt,5p49v5933"
|
|
"idt,5p49v5935"
|
|
"idt,5p49v6901"
|
|
- reg: i2c device address, shall be 0x68 or 0x6a.
|
|
- #clock-cells: from common clock binding; shall be set to 1.
|
|
- clocks: from common clock binding; list of parent clock handles,
|
|
- 5p49v5923 and
|
|
5p49v5925 and
|
|
5p49v6901: (required) either or both of XTAL or CLKIN
|
|
reference clock.
|
|
- 5p49v5933 and
|
|
- 5p49v5935: (optional) property not present (internal
|
|
Xtal used) or CLKIN reference
|
|
clock.
|
|
- clock-names: from common clock binding; clock input names, can be
|
|
- 5p49v5923 and
|
|
5p49v5925 and
|
|
5p49v6901: (required) either or both of "xin", "clkin".
|
|
- 5p49v5933 and
|
|
- 5p49v5935: (optional) property not present or "clkin".
|
|
|
|
==Mapping between clock specifier and physical pins==
|
|
|
|
When referencing the provided clock in the DT using phandle and
|
|
clock specifier, the following mapping applies:
|
|
|
|
5P49V5923:
|
|
0 -- OUT0_SEL_I2CB
|
|
1 -- OUT1
|
|
2 -- OUT2
|
|
|
|
5P49V5933:
|
|
0 -- OUT0_SEL_I2CB
|
|
1 -- OUT1
|
|
2 -- OUT4
|
|
|
|
5P49V5925 and
|
|
5P49V5935:
|
|
0 -- OUT0_SEL_I2CB
|
|
1 -- OUT1
|
|
2 -- OUT2
|
|
3 -- OUT3
|
|
4 -- OUT4
|
|
|
|
5P49V6901:
|
|
0 -- OUT0_SEL_I2CB
|
|
1 -- OUT1
|
|
2 -- OUT2
|
|
3 -- OUT3
|
|
4 -- OUT4
|
|
|
|
==Example==
|
|
|
|
/* 25MHz reference crystal */
|
|
ref25: ref25m {
|
|
compatible = "fixed-clock";
|
|
#clock-cells = <0>;
|
|
clock-frequency = <25000000>;
|
|
};
|
|
|
|
i2c-master-node {
|
|
|
|
/* IDT 5P49V5923 i2c clock generator */
|
|
vc5: clock-generator@6a {
|
|
compatible = "idt,5p49v5923";
|
|
reg = <0x6a>;
|
|
#clock-cells = <1>;
|
|
|
|
/* Connect XIN input to 25MHz reference */
|
|
clocks = <&ref25m>;
|
|
clock-names = "xin";
|
|
};
|
|
};
|
|
|
|
/* Consumer referencing the 5P49V5923 pin OUT1 */
|
|
consumer {
|
|
...
|
|
clocks = <&vc5 1>;
|
|
...
|
|
}
|