[PATCH v4 1/4] mfd: Add DT bindings documentation for Samsung Exynos LPASS

[Sylwester Nawrocki]

This patch adds documentation of the DT bindings for the Samsung
Exynos SoC Low Power Audio Subsystem.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
---

There were few rather significant additions since v3 and I had to drop tags:
 Acked-by: Rob Herring <robh@xxxxxxxxxx>
 Acked-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>

Changes since v3:
 - moved to Documentation/devicetree/bindings/mfd,
 - added #address-cells, #size-cells, ranges as required
   properties,
 - added description of the IP block subnodes and links
   to their binding's documentation.

Changes since v2:
 - none.
---
 .../bindings/mfd/samsung,exynos5433-lpass.txt       | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/samsung,exynos5433-lpass.txt

diff --git a/Documentation/devicetree/bindings/mfd/samsung,exynos5433-lpass.txt b/Documentation/devicetree/bindings/mfd/samsung,exynos5433-lpass.txt
new file mode 100644
index 0000000..7e97c0d
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/samsung,exynos5433-lpass.txt
@@ -0,0 +1,21 @@
+
+Samsung Exynos SoC Low Power Audio Subsystem (LPASS)
+
+Required properties:
+
+ - compatible : "samsung,exynos5433-lpass"
+ - reg : should contain the LPASS top SFR region location and size
+ - samsung,pmu-syscon : the phandle to the Power Management Unit node
+ - #address-cells: should be 1
+ - #size-cells: should be 1
+ - ranges: must be present
+
+Each IP block of the Low Power Audio Subsystem should be specified
+as an optional sub-node. For "samsung,exynos5433-lpass" compatible
+this includes: UART, SLIMBUS, PCM, I2S, DMAC, Timers 0...4, WDT 0...1
+devices.
+
+Bindings of the sub-nodes are described in:
+ Documentation/devicetree/bindings/serial/samsung_uart.txt
+ Documentation/devicetree/bindings/sound/samsung-i2s.txt
+ Documentation/devicetree/bindings/dma/arm-pl330.txt
-- 
1.9.1