Re: [PATCH 03/10] devicetree: bindings: add bindings for ahci-da850

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On 01/13/2017 06:37 AM, Bartosz Golaszewski wrote:
Add DT bindings for the TI DA850 AHCI SATA controller.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
---
 .../devicetree/bindings/ata/ahci-da850.txt          | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/ata/ahci-da850.txt

diff --git a/Documentation/devicetree/bindings/ata/ahci-da850.txt b/Documentation/devicetree/bindings/ata/ahci-da850.txt
new file mode 100644
index 0000000..d07c241
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/ahci-da850.txt
@@ -0,0 +1,21 @@
+Device tree binding for the TI DA850 AHCI SATA Controller
+---------------------------------------------------------
+
+Required properties:
+  - compatible: must be "ti,da850-ahci"
+  - reg: physical base addresses and sizes of the controller's register areas
+  - interrupts: interrupt specifier (refer to the interrupt binding)
+
+Optional properties:
+  - clocks: clock specifier (refer to the common clock binding)
+  - da850,clk_multiplier: the multiplier for the reference clock needed
+                          for 1.5GHz PLL output

A clock multiplier property seems redundant if you are specifying a clock. It should be possible to get the rate from the clock to determine which multiplier is needed.

+
+Example:
+
+	sata: ahci@0x218000 {
+		compatible = "ti,da850-ahci";
+		reg = <0x218000 0x2000>, <0x22c018 0x4>;
+		interrupts = <67>;
+		da850,clk_multiplier = <7>;
+	};


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