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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@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Chanwoo Choi 2014-07-22 03:04:00 +01:00 committed by Jonathan Cameron
parent adb4e3f4cf
commit 0af34eec8f
1 changed files with 23 additions and 2 deletions
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25
Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt
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@ -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