[PATCHv3 2/2] iio: devicetree: Add DT binding documentation for Exynos3250 ADC

[Chanwoo Choi]

This patch add DT binding documentation for Exynos3250 ADC IP. Exynos3250 has
special clock ('sclk_tsadc') for ADC which provide clock to internal ADC.

Cc: Rob Herring <robh+dt at kernel.org>
Cc: Pawel Moll <pawel.moll at arm.com>
Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Ian Campbell <ijc+devicetree at hellion.org.uk>
Cc: Kumar Gala <galak at codeaurora.org>
Cc: Randy Dunlap <rdunlap at infradead.org>
Cc: Kukjin Kim <kgene.kim at samsung.com>
Cc: Naveen Krishna Chatradhi <ch.naveen at samsung.com>
Cc: Tomasz Figa <t.figa at samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi at samsung.com>
Acked-by: Kyungmin Park <kyungmin.park at samsung.com>
---
 .../devicetree/bindings/arm/samsung/exynos-adc.txt   | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt b/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt
index 5d49f2b..7532ec3 100644
--- a/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt
+++ b/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt
@@ -14,6 +14,8 @@ Required properties:
 				for exynos4412/5250 controllers.
 			Must be "samsung,exynos-adc-v2" for
 				future controllers.
+			Must be "samsung,exynos-adc-v3" for
+				for exynos3250 controllers.
 - 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
@@ -21,7 +23,11 @@ Required properties:
 			the Samsung device uses.
 - #io-channel-cells = <1>; As ADC has multiple outputs
 - clocks		From common clock binding: handle to adc clock.
+			From common clock binding: handle to sclk_tsadc clock
+			if using Exynos3250.
 - clock-names		From common clock binding: Shall be "adc".
+			From common clock binding: Shall be "sclk_tsadc"
+			if using Exynos3250.
 - vdd-supply		VDD input supply.
 
 Note: child nodes can be added for auto probing from device tree.
@@ -41,6 +47,20 @@ adc: adc at 12D10000 {
 	vdd-supply = <&buck5_reg>;
 };
 
+If Exynos3250 uses ADC,
+adc: adc at 126C0000 {
+	compatible = "samsung,exynos-adc-v3";
+	reg = <0x126C0000 0x100>, <0x10020718 0x4>;
+	interrupts = <0 137 0>;
+	#io-channel-cells = <1>;
+	io-channel-ranges;
+
+	clock-names = "adc", "sclk_tsadc";
+	clocks = <&cmu CLK_TSADC>, <&cmu CLK_SCLK_TSADC>;
+
+	vdd-supply = <&buck5_reg>;
+};
+
 
 Example: Adding child nodes in dts file
 
-- 
1.8.0