[PATCH 1/3] dt-bindings: sound: renesas,fsi: Add support for multiple clocks

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

The FSI on r8a7740 requires the SPU clock to be enabled
before accessing its registers.
Without this clock, register access may lead to a system
hang.
Add support for the "spu" clock so it can be managed by
the driver.
The binding is also extended to allow additional clocks,
as FSIB may require more clock inputs, while FSIA
typically uses fewer.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 .../devicetree/bindings/sound/renesas,fsi.yaml       | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/renesas,fsi.yaml b/Documentation/devicetree/bindings/sound/renesas,fsi.yaml
index df91991699a7..225cd8d369bb 100644
--- a/Documentation/devicetree/bindings/sound/renesas,fsi.yaml
+++ b/Documentation/devicetree/bindings/sound/renesas,fsi.yaml
@@ -38,7 +38,11 @@ properties:
     maxItems: 1
 
   clocks:
-    maxItems: 1
+    minItems: 1
+    maxItems: 8
+
+  clock-names:
+    description: List of necessary clock names.
 
   power-domains:
     maxItems: 1
@@ -77,7 +81,11 @@ examples:
             compatible = "renesas,fsi2-r8a7740", "renesas,sh_fsi2";
             reg = <0xfe1f0000 0x400>;
             interrupts = <GIC_SPI 9 0x4>;
-            clocks = <&mstp3_clks R8A7740_CLK_FSI>;
+            clocks = <&mstp3_clks R8A7740_CLK_FSI>, <&spu_clk>,
+                     <&fsia_clk>, <&fsib_clk>, <&fsidiva_clk>,
+                     <&fsidivb_clk>,<&fsiack_clk>,<&fsibck_clk>;
+            clock-names = "fsi", "spu", "icka", "ickb",
+                          "diva", "divb", "xcka", "xckb";
             power-domains = <&pd_a4mp>;
 
             #sound-dai-cells = <1>;
-- 
2.43.0