124 lines
5.1 KiB
Plaintext
124 lines
5.1 KiB
Plaintext
|
Binding for a type of flexgen structure found on certain
|
||
|
|
STMicroelectronics consumer electronics SoC devices
|
||
|
|
|
||
|
|
This structure includes:
|
||
|
|
- a clock cross bar (represented by a mux element)
|
||
|
|
- a pre and final dividers (represented by a divider and gate elements)
|
||
|
|
|
||
|
|
Flexgen structure is a part of Clockgen[1].
|
||
|
|
|
||
|
|
Please find an example below:
|
||
|
|
|
||
|
|
Clockgen block diagram
|
||
|
|
-------------------------------------------------------------------
|
||
|
|
| Flexgen structure |
|
||
|
|
| --------------------------------------------- |
|
||
|
|
| | ------- -------- -------- | |
|
||
|
|
clk_sysin | | | | | | | | |
|
||
|
|
---|-----------------|-->| | | | | | | |
|
||
|
|
| | | | | | | | | | |
|
||
|
|
| | ------- | | | |Pre | |Final | | |
|
||
|
|
| | |PLL0 | | | | |Dividers| |Dividers| | |
|
||
|
|
| |->| | | | | | x32 | | x32 | | |
|
||
|
|
| | | odf_0|----|-->| | | | | | | |
|
||
|
|
| | | | | | | | | | | | |
|
||
|
|
| | | | | | | | | | | | |
|
||
|
|
| | | | | | | | | | | | |
|
||
|
|
| | | | | | | | | | | | |
|
||
|
|
| | ------- | | | | | | | | |
|
||
|
|
| | | | | | | | | | |
|
||
|
|
| | ------- | | Clock | | | | | | |
|
||
|
|
| | |PLL1 | | | | | | | | | |
|
||
|
|
| |->| | | | Cross | | | | | | |
|
||
|
|
| | | odf_0|----|-->| | | | | | CLK_DIV[31:0]
|
||
|
|
| | | | | | Bar |====>| |====>| |===|=========>
|
||
|
|
| | | | | | | | | | | | |
|
||
|
|
| | | | | | | | | | | | |
|
||
|
|
| | | | | | | | | | | | |
|
||
|
|
| | ------- | | | | | | | | |
|
||
|
|
| | | | | | | | | | |
|
||
|
|
| | ------- | | | | | | | | |
|
||
|
|
| | |QUADFS | | | | | | | | | |
|
||
|
|
| |->| ch0|----|-->| | | | | | | |
|
||
|
|
| | | | | | | | | | | |
|
||
|
|
| | ch1|----|-->| | | | | | | |
|
||
|
|
| | | | | | | | | | | |
|
||
|
|
| | ch2|----|-->| | | DIV | | DIV | | |
|
||
|
|
| | | | | | | 1 to | | 1 to | | |
|
||
|
|
| | ch3|----|-->| | | 1024 | | 64 | | |
|
||
|
|
| ------- | | | | | | | | |
|
||
|
|
| | ------- -------- -------- | |
|
||
|
|
| -------------------------------------------- |
|
||
|
|
| |
|
||
|
|
-------------------------------------------------------------------
|
||
|
|
|
||
|
|
This binding uses the common clock binding[2].
|
||
|
|
|
||
|
|
[1] Documentation/devicetree/bindings/clock/st/st,clkgen.txt
|
||
|
|
[2] Documentation/devicetree/bindings/clock/clock-bindings.txt
|
||
|
|
|
||
|
|
Required properties:
|
||
|
|
- compatible : shall be:
|
||
|
|
"st,flexgen"
|
||
|
|
"st,flexgen-audio", "st,flexgen" (enable clock propagation on parent for
|
||
|
|
audio use case)
|
||
|
|
"st,flexgen-video", "st,flexgen" (enable clock propagation on parent
|
||
|
|
and activate synchronous mode)
|
||
|
|
|
||
|
|
- #clock-cells : from common clock binding; shall be set to 1 (multiple clock
|
||
|
|
outputs).
|
||
|
|
|
||
|
|
- clocks : must be set to the parent's phandle. it's could be output clocks of
|
||
|
|
a quadsfs or/and a pll or/and clk_sysin (up to 7 clocks)
|
||
|
|
|
||
|
|
- clock-output-names : List of strings used to name the clock outputs.
|
||
|
|
|
||
|
|
Example:
|
||
|
|
|
||
|
|
clk_s_c0_flexgen: clk-s-c0-flexgen {
|
||
|
|
|
||
|
|
#clock-cells = <1>;
|
||
|
|
compatible = "st,flexgen";
|
||
|
|
|
||
|
|
clocks = <&clk_s_c0_pll0 0>,
|
||
|
|
<&clk_s_c0_pll1 0>,
|
||
|
|
<&clk_s_c0_quadfs 0>,
|
||
|
|
<&clk_s_c0_quadfs 1>,
|
||
|
|
<&clk_s_c0_quadfs 2>,
|
||
|
|
<&clk_s_c0_quadfs 3>,
|
||
|
|
<&clk_sysin>;
|
||
|
|
|
||
|
|
clock-output-names = "clk-icn-gpu",
|
||
|
|
"clk-fdma",
|
||
|
|
"clk-nand",
|
||
|
|
"clk-hva",
|
||
|
|
"clk-proc-stfe",
|
||
|
|
"clk-proc-tp",
|
||
|
|
"clk-rx-icn-dmu",
|
||
|
|
"clk-rx-icn-hva",
|
||
|
|
"clk-icn-cpu",
|
||
|
|
"clk-tx-icn-dmu",
|
||
|
|
"clk-mmc-0",
|
||
|
|
"clk-mmc-1",
|
||
|
|
"clk-jpegdec",
|
||
|
|
"clk-ext2fa9",
|
||
|
|
"clk-ic-bdisp-0",
|
||
|
|
"clk-ic-bdisp-1",
|
||
|
|
"clk-pp-dmu",
|
||
|
|
"clk-vid-dmu",
|
||
|
|
"clk-dss-lpc",
|
||
|
|
"clk-st231-aud-0",
|
||
|
|
"clk-st231-gp-1",
|
||
|
|
"clk-st231-dmu",
|
||
|
|
"clk-icn-lmi",
|
||
|
|
"clk-tx-icn-disp-1",
|
||
|
|
"clk-icn-sbc",
|
||
|
|
"clk-stfe-frc2",
|
||
|
|
"clk-eth-phy",
|
||
|
|
"clk-eth-ref-phyclk",
|
||
|
|
"clk-flash-promip",
|
||
|
|
"clk-main-disp",
|
||
|
|
"clk-aux-disp",
|
||
|
|
"clk-compo-dvp";
|
||
|
|
};
|