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ASoC: stm32: Add synchronization to SAI bindings 

Add synchronization configuration to STM32 SAI bindings.
This patch also adds peripheral clock which is required
to access synchronization register.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Olivier Moysan 2017-10-19 15:03:17 +02:00 committed by Mark Brown
parent 3c6f6c53ab
commit 14f0e5f8d9
1 changed files with 11 additions and 3 deletions
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14
Documentation/devicetree/bindings/sound/st,stm32-sai.txt
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@ -10,13 +10,21 @@ Required properties:
- reg: Base address and size of SAI common register set. - reg: Base address and size of SAI common register set.
- clocks: Must contain phandle and clock specifier pairs for each entry - clocks: Must contain phandle and clock specifier pairs for each entry
in clock-names. in clock-names.
- clock-names: Must contain "x8k" and "x11k" - clock-names: Must contain "pclk" "x8k" and "x11k"
"pclk": Clock which feeds the peripheral bus interface.
Mandatory for "st,stm32h7-sai" compatible.
Not used for "st,stm32f4-sai" compatible.
"x8k": SAI parent clock for sampling rates multiple of 8kHz. "x8k": SAI parent clock for sampling rates multiple of 8kHz.
"x11k": SAI parent clock for sampling rates multiple of 11.025kHz. "x11k": SAI parent clock for sampling rates multiple of 11.025kHz.
- interrupts: cpu DAI interrupt line shared by SAI sub-blocks - interrupts: cpu DAI interrupt line shared by SAI sub-blocks
Optional properties: Optional properties:
- resets: Reference to a reset controller asserting the SAI - resets: Reference to a reset controller asserting the SAI
- st,sync: specify synchronization mode.
By default SAI sub-block is in asynchronous mode.
This property sets SAI sub-block as slave of another SAI sub-block.
Must contain the phandle and index of the sai sub-block providing
the synchronization.
SAI subnodes: SAI subnodes:
Two subnodes corresponding to SAI sub-block instances A et B can be defined. Two subnodes corresponding to SAI sub-block instances A et B can be defined.
@ -52,8 +60,8 @@ sai1: sai1@40015800 {
#size-cells = <1>; #size-cells = <1>;
ranges = <0 0x40015800 0x400>; ranges = <0 0x40015800 0x400>;
reg = <0x40015800 0x4>; reg = <0x40015800 0x4>;
clocks = <&rcc PLL1_Q>, <&rcc PLL2_P>; clocks = <&rcc SAI1_CK>, <&rcc PLL1_Q>, <&rcc PLL2_P>;
clock-names = "x8k", "x11k"; clock-names = "pclk", "x8k", "x11k";
interrupts = <87>; interrupts = <87>;
sai1a: audio-controller@40015804 { sai1a: audio-controller@40015804 {