@@ -1,10 +1,11 @@
Samsung Exynos Analog to Digital Converter bindings
The devicetree bindings are for the new ADC driver written for
-Exynos4 and upward SoCs from Samsung.
+Exynos4 and Exynos5 series SoCs from Samsung.
+Now supports Exynos3250 too.
New driver handles the following
-1. Supports ADC IF found on EXYNOS4412/EXYNOS5250
+1. Supports ADC IF found on Exynos3250/EXYNOS4412/EXYNOS5 series
and future SoCs from Samsung
2. Add ADC driver under iio/adc framework
3. Also adds the Documentation for device tree bindings
@@ -18,7 +19,7 @@ Required properties:
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.
+ length)
- interrupts: Contains the interrupt information for the timer. The
format is being dependent on which interrupt controller
the Samsung device uses.
@@ -31,6 +32,8 @@ Required properties:
- "sclk_adc" : ADC special clock (only for Exynos3250
and compatible ADC block)
- vdd-supply VDD input supply.
+- samsung,syscon-phandle Contains the PMU system controller node
+ (To access the ADC_PHY register)
Note: child nodes can be added for auto probing from device tree.
@@ -38,7 +41,7 @@ Example: adding device info in dtsi file
adc: adc@12D10000 {
compatible = "samsung,exynos-adc-v1";
- reg = <0x12D10000 0x100>, <0x10040718 0x4>;
+ reg = <0x12D10000 0x100>;
interrupts = <0 106 0>;
#io-channel-cells = <1>;
io-channel-ranges;
@@ -47,13 +50,14 @@ adc: adc@12D10000 {
clock-names = "adc";
vdd-supply = <&buck5_reg>;
+ samsung,syscon-phandle = <&pmu_system_controller>;
};
Example: adding device info in dtsi file for Exynos3250 with additional sclk
adc: adc@126C0000 {
compatible = "samsung,exynos3250-adc-v2";
- reg = <0x126C0000 0x100>, <0x10020718 0x4>;
+ reg = <0x126C0000 0x100>;
interrupts = <0 137 0>;
#io-channel-cells = <1>;
io-channel-ranges;
@@ -62,6 +66,7 @@ adc: adc@126C0000 {
clock-names = "adc", "sclk_adc";
vdd-supply = <&buck5_reg>;
+ samsung,syscon-phandle = <&pmu_system_controller>;
};
Example: Adding child nodes in dts file
This patch updates the DT bindings in exynos-adc.txt with the syscon phandle to the ADC nodes. Also removes the 2nd "reg" property, which used to carry the ADC_PHY regiser base from PMU. Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> To: devicetree@vger.kernel.org --- Changes since v1: rebased on top of Changwoo's v5 ADC patches for exynos3250 iio: adc: exynos_adc: Support Exynos3250 ADC and code clean https://lkml.org/lkml/2014/6/27/16 .../devicetree/bindings/iio/adc/exynos-adc.txt | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-)