linux-kernel - [PATCH 2/2] ARM: dts: qcom: msm8974-lge-nexus5: Add fuel gauge

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Message-Id: <20201126141144.1763779-2-iskren.chernev@gmail.com>
Date:   Thu, 26 Nov 2020 16:11:44 +0200
From:   Iskren Chernev <iskren.chernev@...il.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>, Andy Gross <agross@...nel.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht,
        linux-arm-msm@...r.kernel.org,
        Iskren Chernev <iskren.chernev@...il.com>,
        Nícolas F . R . A . Prado 
        <nfraprado@...tonmail.com>
Subject: [PATCH 2/2] ARM: dts: qcom: msm8974-lge-nexus5: Add fuel gauge

The LG Nexus 5 uses a maxim17048 fuelgauge. The maxim,rcomp value is
taken from downstream dt. Temperature-based compensation is not yet
supported in the mainline driver, but the readings seem fine nevertheless.

Signed-off-by: Iskren Chernev <iskren.chernev@...il.com>
Tested-by: Nícolas F. R. A. Prado <nfraprado@...tonmail.com>
---
 .../qcom-msm8974-lge-nexus5-hammerhead.dts    | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
index 32b474bfeec32..e769f638f2052 100644
--- a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
+++ b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
@@ -566,6 +566,22 @@ charger: bq24192@6b {
 
 			usb_otg_vbus: usb-otg-vbus { };
 		};
+
+		fuelgauge: max17048@36 {
+			compatible = "maxim,max17048";
+			reg = <0x36>;
+
+			maxim,double-soc;
+			maxim,rcomp = /bits/ 8 <0x4d>;
+
+			interrupt-parent = <&msmgpio>;
+			interrupts = <9 IRQ_TYPE_EDGE_FALLING>;
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&fuelgauge_pin>;
+
+			maxim,alert-low-soc-level = <2>;
+		};
 	};
 
 	i2c@...24000 {
@@ -706,6 +722,15 @@ gpio_keys_pin_a: gpio-keys-active {
 				power-source = <PM8941_GPIO_S3>;
 			};
 
+			fuelgauge_pin: fuelgauge-int {
+				pins = "gpio9";
+				function = "normal";
+
+				bias-disable;
+				input-enable;
+				power-source = <PM8941_GPIO_S3>;
+			};
+
 			wlan_sleep_clk_pin: wl-sleep-clk {
 				pins = "gpio16";
 				function = "func2";
-- 
2.29.2