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@xxxxxxxxxxxxxxxxxxxxx>
---
.../bindings/sound/audio-graph-card.txt | 72 +++++++++++++++++++
1 file changed, 72 insertions(+)
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
