Re: [PATCHv8 3/4] iio: devicetree: Add DT binding documentation for Exynos3250 ADC

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On 22/07/14 03:04, Chanwoo Choi wrote:
This patch add DT binding documentation for Exynos3250 ADC IP. Exynos3250 has
special clock ('sclk_adc') for ADC which provide clock to internal ADC.

Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Reviewed-by: Naveen Krishna Chatradhi <ch.naveen@xxxxxxxxxxx>
Reviewed-by: Tomasz Figa <t.figa@xxxxxxxxxxx>
Acked-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
Applied to the togreg branch of iio.git - pushed out as testing for now.

---
  .../devicetree/bindings/arm/samsung/exynos-adc.txt | 25 ++++++++++++++++++++--
  1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt b/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt
index 832fe8c..adc61b0 100644
--- a/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt
+++ b/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt
@@ -14,14 +14,21 @@ Required properties:
  				for exynos4412/5250 controllers.
  			Must be "samsung,exynos-adc-v2" for
  				future controllers.
+			Must be "samsung,exynos3250-adc" for
+				controllers compatible with ADC of Exynos3250.
  - reg:			Contains ADC register address range (base address and
  			length) and the address of the phy enable register.
  - interrupts: 		Contains the interrupt information for the timer. The
  			format is being dependent on which interrupt controller
  			the Samsung device uses.
  - #io-channel-cells = <1>; As ADC has multiple outputs
-- clocks		From common clock binding: handle to adc clock.
-- clock-names		From common clock binding: Shall be "adc".
+- clocks		From common clock bindings: handles to clocks specified
+			in "clock-names" property, in the same order.
+- clock-names		From common clock bindings: list of clock input names
+			used by ADC block:
+			- "adc" : ADC bus clock
+			- "sclk" : ADC special clock (only for Exynos3250 and
+				   compatible ADC block)
  - vdd-supply		VDD input supply.

  Note: child nodes can be added for auto probing from device tree.
@@ -41,6 +48,20 @@ adc: adc@12D10000 {
  	vdd-supply = <&buck5_reg>;
  };

+Example: adding device info in dtsi file for Exynos3250 with additional sclk
+
+adc: adc@126C0000 {
+	compatible = "samsung,exynos3250-adc", "samsung,exynos-adc-v2;
+	reg = <0x126C0000 0x100>, <0x10020718 0x4>;
+	interrupts = <0 137 0>;
+	#io-channel-cells = <1>;
+	io-channel-ranges;
+
+	clocks = <&cmu CLK_TSADC>, <&cmu CLK_SCLK_TSADC>;
+	clock-names = "adc", "sclk";
+
+	vdd-supply = <&buck5_reg>;
+};

  Example: Adding child nodes in dts file



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