| Message ID | 20210318172627.12173-3-dariobin@libero.it (mailing list archive) |
|---|---|
| State | Changes Requested, archived |
| Headers | show |
| Series | clk: ti: add am33xx spread spectrum clock support | expand |
On Thu, Mar 18, 2021 at 06:26:24PM +0100, Dario Binacchi wrote: > DT bindings for enabling and adjusting spread spectrum clocking have > been added. > > Signed-off-by: Dario Binacchi <dariobin@libero.it> > --- > > (no changes since v1) > > .../devicetree/bindings/clock/ti/dpll.txt | 20 +++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/Documentation/devicetree/bindings/clock/ti/dpll.txt b/Documentation/devicetree/bindings/clock/ti/dpll.txt > index df57009ff8e7..0810ae073294 100644 > --- a/Documentation/devicetree/bindings/clock/ti/dpll.txt > +++ b/Documentation/devicetree/bindings/clock/ti/dpll.txt > @@ -42,6 +42,11 @@ Required properties: > "idlest" - contains the idle status register base address > "mult-div1" - contains the multiplier / divider register base address > "autoidle" - contains the autoidle register base address (optional) > + "ssc-deltam" - DPLL supports spread spectrum clocking (SSC), contains > + the frequency spreading register base address (optional) > + "ssc-modfreq" - DPLL supports spread spectrum clocking (SSC), contains > + the modulation frequency register base address > + (optional) > ti,am3-* dpll types do not have autoidle register > ti,omap2-* dpll type does not support idlest / autoidle registers > > @@ -51,6 +56,14 @@ Optional properties: > - ti,low-power-stop : DPLL supports low power stop mode, gating output > - ti,low-power-bypass : DPLL output matches rate of parent bypass clock > - ti,lock : DPLL locks in programmed rate > + - ti,min-div : the minimum divisor to start from to round the DPLL > + target rate > + - ti,ssc-deltam : DPLL supports spread spectrum clocking, frequency > + spreading in permille (10th of a percent) > + - ti,ssc-modfreq : DPLL supports spread spectrum clocking, spread > + spectrum modulation frequency in kHz Use a standard unit suffix (-hz or -mhz). > + - ti,ssc-downspread : DPLL supports spread spectrum clocking, boolean > + to enable the downspread feature > > Examples: > dpll_core_ck: dpll_core_ck@44e00490 { > @@ -83,3 +96,10 @@ Examples: > clocks = <&sys_ck>, <&sys_ck>; > reg = <0x0500>, <0x0540>; > }; > + > + dpll_disp_ck: dpll_disp_ck { > + #clock-cells = <0>; > + compatible = "ti,am3-dpll-no-gate-clock"; > + clocks = <&sys_clkin_ck>, <&sys_clkin_ck>; > + reg = <0x0498>, <0x0448>, <0x0454>, <0x044c>, <0x0450>; > + }; > -- > 2.17.1 >
diff --git a/Documentation/devicetree/bindings/clock/ti/dpll.txt b/Documentation/devicetree/bindings/clock/ti/dpll.txt index df57009ff8e7..0810ae073294 100644 --- a/Documentation/devicetree/bindings/clock/ti/dpll.txt +++ b/Documentation/devicetree/bindings/clock/ti/dpll.txt @@ -42,6 +42,11 @@ Required properties: "idlest" - contains the idle status register base address "mult-div1" - contains the multiplier / divider register base address "autoidle" - contains the autoidle register base address (optional) + "ssc-deltam" - DPLL supports spread spectrum clocking (SSC), contains + the frequency spreading register base address (optional) + "ssc-modfreq" - DPLL supports spread spectrum clocking (SSC), contains + the modulation frequency register base address + (optional) ti,am3-* dpll types do not have autoidle register ti,omap2-* dpll type does not support idlest / autoidle registers @@ -51,6 +56,14 @@ Optional properties: - ti,low-power-stop : DPLL supports low power stop mode, gating output - ti,low-power-bypass : DPLL output matches rate of parent bypass clock - ti,lock : DPLL locks in programmed rate + - ti,min-div : the minimum divisor to start from to round the DPLL + target rate + - ti,ssc-deltam : DPLL supports spread spectrum clocking, frequency + spreading in permille (10th of a percent) + - ti,ssc-modfreq : DPLL supports spread spectrum clocking, spread + spectrum modulation frequency in kHz + - ti,ssc-downspread : DPLL supports spread spectrum clocking, boolean + to enable the downspread feature Examples: dpll_core_ck: dpll_core_ck@44e00490 { @@ -83,3 +96,10 @@ Examples: clocks = <&sys_ck>, <&sys_ck>; reg = <0x0500>, <0x0540>; }; + + dpll_disp_ck: dpll_disp_ck { + #clock-cells = <0>; + compatible = "ti,am3-dpll-no-gate-clock"; + clocks = <&sys_clkin_ck>, <&sys_clkin_ck>; + reg = <0x0498>, <0x0448>, <0x0454>, <0x044c>, <0x0450>; + };
DT bindings for enabling and adjusting spread spectrum clocking have been added. Signed-off-by: Dario Binacchi <dariobin@libero.it> --- (no changes since v1) .../devicetree/bindings/clock/ti/dpll.txt | 20 +++++++++++++++++++ 1 file changed, 20 insertions(+)