| Message ID | 20201217154142.24301-3-rf@opensource.cirrus.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for Rpi4b + Cirrus Lochnagar2 and CS47L15 | expand |
On Thu, Dec 17, 2020 at 03:41:38PM +0000, Richard Fitzgerald wrote: > The audio-graph-card driver has bindings for configuring the clocking > for DAIs within a component, but is missing bindings for setting > up the PLLs and sysclks of the component. > > This patch adds the two new bindings 'plls' and 'sysclks' so that the > audio-graph-driver can fully configure the component clocking. > > Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> > --- > .../bindings/sound/audio-graph-card.txt | 72 +++++++++++++++++++ > 1 file changed, 72 insertions(+) This is a schema now in master. > > diff --git a/Documentation/devicetree/bindings/sound/audio-graph-card.txt b/Documentation/devicetree/bindings/sound/audio-graph-card.txt > index d5f6919a2d69..30405e64cfbb 100644 > --- a/Documentation/devicetree/bindings/sound/audio-graph-card.txt > +++ b/Documentation/devicetree/bindings/sound/audio-graph-card.txt > @@ -32,6 +32,40 @@ Required properties: > Optional properties: > - pa-gpios: GPIO used to control external amplifier. > > +- plls: A list of component pll settings. There are 4 cells per PLL setting: > + - phandle to the node of the codec or cpu component, > + - component PLL id, > + - component clock source id, > + - frequency (in Hz) of the PLL output clock. > + > + The PLL id and clock source id are specific to the particular component > + so see the relevant component driver for the ids. Typically the > + clock source id indicates the pin the source clock is connected to. > + > + The same phandle can appear in multiple entries so that several plls > + can be set in the same component. > + > +- plls-clocks: A list of clock names giving the source clock for each setting > + in the plls property. > + > +- sysclks: A list of component sysclk settings. There are 4 cells per sysclk > + setting: > + - phandle to the node of the codec or cpu component, > + - component sysclk id, > + - component clock source id, > + - direction of the clock: 0 if the clock is an input to the component, > + 1 if it is an output. > + > + The sysclk id and clock source id are specific to the particular > + component so see the relevant component driver for the ids. Typically > + the clock source id indicates the pin the source clock is connected to. > + > + The same phandle can appear in multiple entries so that several sysclks > + can be set in the same component. > + > +- sysclks-clocks: A list of clock names giving the source clock for each setting > + in the sysclks property. > + > ----------------------- > Example: Single DAI case > ----------------------- > @@ -335,3 +369,41 @@ Example: Multi DAI with DPCM > }; > }; > }; > + > +----------------------- > +Example: Set component sysclks and PLLs > +----------------------- > + > + sound { > + compatible = "audio-graph-card"; > + > + clocks = <&audioclk>, <&pll1>; > + clock-names = "audioclk", "pll1"; > + > + plls = <&cs47l15 MADERA_FLL1_REFCLK MADERA_FLL_SRC_MCLK1 98304000>; > + plls-clocks = "audioclk"; > + > + sysclks = <&cs47l15 MADERA_CLK_SYSCLK_1 MADERA_CLK_SRC_FLL1 0>; > + sysclks-clocks = "pll1"; > + > + dais = <&cpu_i2s_port>; > + > + pll1: pll1 { > + compatible = "fixed-clock"; > + #clock-cells = <0>; > + clock-frequency = <98304000>; > + }; > + }; > + > + cs47l15: codec@0 { > + ... > + ports { > + #address-cells = <1>; > + #size-cells = <0>; > + cs47l15_aif1_port: port@0 { > + reg = <0>; > + cs47l15_aif1: endpoint { > + remote-endpoint = <&cpu_i2s_endpoint>; > + }; > + }; > + }; > -- > 2.20.1 >
diff --git a/Documentation/devicetree/bindings/sound/audio-graph-card.txt b/Documentation/devicetree/bindings/sound/audio-graph-card.txt index d5f6919a2d69..30405e64cfbb 100644 --- a/Documentation/devicetree/bindings/sound/audio-graph-card.txt +++ b/Documentation/devicetree/bindings/sound/audio-graph-card.txt @@ -32,6 +32,40 @@ Required properties: Optional properties: - pa-gpios: GPIO used to control external amplifier. +- plls: A list of component pll settings. There are 4 cells per PLL setting: + - phandle to the node of the codec or cpu component, + - component PLL id, + - component clock source id, + - frequency (in Hz) of the PLL output clock. + + The PLL id and clock source id are specific to the particular component + so see the relevant component driver for the ids. Typically the + clock source id indicates the pin the source clock is connected to. + + The same phandle can appear in multiple entries so that several plls + can be set in the same component. + +- plls-clocks: A list of clock names giving the source clock for each setting + in the plls property. + +- sysclks: A list of component sysclk settings. There are 4 cells per sysclk + setting: + - phandle to the node of the codec or cpu component, + - component sysclk id, + - component clock source id, + - direction of the clock: 0 if the clock is an input to the component, + 1 if it is an output. + + The sysclk id and clock source id are specific to the particular + component so see the relevant component driver for the ids. Typically + the clock source id indicates the pin the source clock is connected to. + + The same phandle can appear in multiple entries so that several sysclks + can be set in the same component. + +- sysclks-clocks: A list of clock names giving the source clock for each setting + in the sysclks property. + ----------------------- Example: Single DAI case ----------------------- @@ -335,3 +369,41 @@ Example: Multi DAI with DPCM }; }; }; + +----------------------- +Example: Set component sysclks and PLLs +----------------------- + + sound { + compatible = "audio-graph-card"; + + clocks = <&audioclk>, <&pll1>; + clock-names = "audioclk", "pll1"; + + plls = <&cs47l15 MADERA_FLL1_REFCLK MADERA_FLL_SRC_MCLK1 98304000>; + plls-clocks = "audioclk"; + + sysclks = <&cs47l15 MADERA_CLK_SYSCLK_1 MADERA_CLK_SRC_FLL1 0>; + sysclks-clocks = "pll1"; + + dais = <&cpu_i2s_port>; + + pll1: pll1 { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <98304000>; + }; + }; + + cs47l15: codec@0 { + ... + ports { + #address-cells = <1>; + #size-cells = <0>; + cs47l15_aif1_port: port@0 { + reg = <0>; + cs47l15_aif1: endpoint { + remote-endpoint = <&cpu_i2s_endpoint>; + }; + }; + };
The audio-graph-card driver has bindings for configuring the clocking for DAIs within a component, but is missing bindings for setting up the PLLs and sysclks of the component. This patch adds the two new bindings 'plls' and 'sysclks' so that the audio-graph-driver can fully configure the component clocking. Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> --- .../bindings/sound/audio-graph-card.txt | 72 +++++++++++++++++++ 1 file changed, 72 insertions(+)