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

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Message-id: <1405994696-3117-4-git-send-email-cw00.choi@samsung.com>
Date:	Tue, 22 Jul 2014 11:04:55 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	jic23@...nel.org
Cc:	ch.naveen@...sung.com, arnd@...db.de, kgene.kim@...sung.com,
	kyungmin.park@...sung.com, t.figa@...sung.com,
	linux-iio@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	Chanwoo Choi <cw00.choi@...sung.com>
Subject: [PATCHv8 3/4] iio: devicetree: Add DT binding documentation for
 Exynos3250 ADC

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@...sung.com>
Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
Reviewed-by: Naveen Krishna Chatradhi <ch.naveen@...sung.com>
Reviewed-by: Tomasz Figa <t.figa@...sung.com>
Acked-by: Kukjin Kim <kgene.kim@...sung.com>
Acked-by: Arnd Bergmann <arnd@...db.de>
---
 .../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@...10000 {
 	vdd-supply = <&buck5_reg>;
 };
 
+Example: adding device info in dtsi file for Exynos3250 with additional sclk
+
+adc: adc@...C0000 {
+	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
 
-- 
1.8.0

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