diff mbox

[v2,4/4] ARM64: dts: meson: meson-gx: add the SAR ADC

Message ID 20170115224221.15510-5-martin.blumenstingl@googlemail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Martin Blumenstingl Jan. 15, 2017, 10:42 p.m. UTC 
Add the SAR ADC to meson-gxbb.dtsi and meson-gxl.dtsi. GXBB provides a
10-bit ADC while GXL (and GXM, which uses the same ADC as GXL) provides
a 12-bit ADC.
Some boards use resistor ladder buttons connected through one of the ADC
channels. On newer devices (GXL and GXM) some boards use pull-ups/downs
to change the resistance (and thus the ADC value) on of the ADC channels
to indicate the board revision.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 arch/arm64/boot/dts/amlogic/meson-gx.dtsi   |  8 ++++++++
 arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 10 ++++++++++
 arch/arm64/boot/dts/amlogic/meson-gxl.dtsi  | 10 ++++++++++
 3 files changed, 28 insertions(+)
diff mbox

Patch

diff --git a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
index cddad8c795ec..041e4f0ed7d7 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
@@ -237,6 +237,14 @@ 
 				status = "disabled";
 			};
 
+			saradc: adc@8680 {
+				compatible = "amlogic,meson-saradc";
+				#io-channel-cells = <1>;
+				status = "disabled";
+				reg = <0x0 0x8680 0x0 0x34>;
+				interrupts = <GIC_SPI 79 IRQ_TYPE_EDGE_RISING>;
+			};
+
 			pwm_ef: pwm@86c0 {
 				compatible = "amlogic,meson-gx-pwm", "amlogic,meson-gxbb-pwm";
 				reg = <0x0 0x086c0 0x0 0x10>;
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
index 5d686334f692..114d7e1c9fc0 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
@@ -429,6 +429,16 @@ 
 	clocks = <&clkc CLKID_I2C>;
 };
 
+&saradc {
+	compatible = "amlogic,meson-gxbb-saradc", "amlogic,meson-saradc";
+	clocks = <&xtal>,
+		 <&clkc CLKID_SAR_ADC>,
+		 <&clkc CLKID_SANA>,
+		 <&clkc CLKID_SAR_ADC_CLK>,
+		 <&clkc CLKID_SAR_ADC_SEL>;
+	clock-names = "clkin", "core", "sana", "adc_clk", "adc_sel";
+};
+
 &sd_emmc_a {
 	clocks = <&clkc CLKID_SD_EMMC_A>,
 		 <&xtal>,
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
index bb2842f8a08f..6b63296b6c60 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
@@ -273,6 +273,16 @@ 
 	clocks = <&clkc CLKID_I2C>;
 };
 
+&saradc {
+	compatible = "amlogic,meson-gxl-saradc", "amlogic,meson-saradc";
+	clocks = <&xtal>,
+		 <&clkc CLKID_SAR_ADC>,
+		 <&clkc CLKID_SANA>,
+		 <&clkc CLKID_SAR_ADC_CLK>,
+		 <&clkc CLKID_SAR_ADC_SEL>;
+	clock-names = "clkin", "core", "sana", "adc_clk", "adc_sel";
+};
+
 &sd_emmc_a {
 	clocks = <&clkc CLKID_SD_EMMC_A>,
 		 <&xtal>,