linux-kernel - [PATCH 2/4] arm64: dts: sprd: Add ADC calibration support

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Date:   Mon, 21 Jan 2019 15:38:29 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     robh+dt@...nel.org, mark.rutland@....com, arnd@...db.de,
        olof@...om.net, orsonzhai@...il.com, zhang.lyra@...il.com
Cc:     devicetree@...r.kernel.org, arm@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        broonie@...nel.org, baolin.wang@...aro.org
Subject: [PATCH 2/4] arm64: dts: sprd: Add ADC calibration support

This patch adds phandles to the calibration cells provided by the Efuse
device, which is used to calibrate the ADC channel scales.

Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
 arch/arm64/boot/dts/sprd/sc2731.dtsi |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/sprd/sc2731.dtsi b/arch/arm64/boot/dts/sprd/sc2731.dtsi
index f2f2aa5..a2edc25 100644
--- a/arch/arm64/boot/dts/sprd/sc2731.dtsi
+++ b/arch/arm64/boot/dts/sprd/sc2731.dtsi
@@ -63,6 +63,14 @@
 			#address-cells = <1>;
 			#size-cells = <1>;
 			hwlocks = <&hwlock 12>;
+
+			adc_big_scale: calib@24 {
+				reg = <0x24 0x2>;
+			};
+
+			adc_small_scale: calib@26 {
+				reg = <0x26 0x2>;
+			};
 		};
 
 		pmic_adc: adc@480 {
@@ -72,6 +80,8 @@
 			interrupts = <0>;
 			#io-channel-cells = <1>;
 			hwlocks = <&hwlock 4>;
+			nvmem-cell-names = "big_scale_calib", "small_scale_calib";
+			nvmem-cells = <&adc_big_scale>, <&adc_small_scale>;
 		};
 
 		vibrator@ec8 {
-- 
1.7.9.5