linux-kernel - [PATCH v2 1/2] ARM: dts: exynos: add charger and battery to p4note

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Message-Id: <d7f7b0f87a18b5cc44ba97390461c15469439829.1643919230.git.martin.juecker@gmail.com>
Date:   Thu,  3 Feb 2022 21:29:47 +0100
From:   Martin Jücker <martin.juecker@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Russell King <linux@...linux.org.uk>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Martin Jücker <martin.juecker@...il.com>
Subject: [PATCH v2 1/2] ARM: dts: exynos: add charger and battery to p4note

Add device tree entry to support the Summit SMB347 charger which is
built into the p4note devices, as well as a simple battery node.

Signed-off-by: Martin Jücker <martin.juecker@...il.com>
---
Changes in v2:
  - squash charger and battery commits
---
 arch/arm/boot/dts/exynos4412-p4note.dtsi | 35 ++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4412-p4note.dtsi b/arch/arm/boot/dts/exynos4412-p4note.dtsi
index b386a9b8e188..fcd75cceb877 100644
--- a/arch/arm/boot/dts/exynos4412-p4note.dtsi
+++ b/arch/arm/boot/dts/exynos4412-p4note.dtsi
@@ -16,6 +16,7 @@
 #include <dt-bindings/input/linux-event-codes.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/pinctrl/samsung.h>
+#include <dt-bindings/power/summit,smb347-charger.h>
 
 / {
 	compatible = "samsung,p4note", "samsung,exynos4412", "samsung,exynos4";
@@ -114,6 +115,17 @@ wlan_pwrseq: sdhci3-pwrseq {
 		clock-names = "ext_clock";
 	};
 
+	battery_cell: battery-cell {
+		compatible = "simple-battery";
+		device-chemistry = "lithium-ion";
+		constant-charge-current-max-microamp = <2200000>;
+		precharge-current-microamp = <250000>;
+		charge-term-current-microamp = <250000>;
+		constant-charge-voltage-max-microvolt = <4200000>;
+
+		power-supplies = <&power_supply>;
+	};
+
 	i2c-gpio-1 {
 		compatible = "i2c-gpio";
 		sda-gpios = <&gpy2 4 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
@@ -182,6 +194,29 @@ stmpe_adc {
 			};
 		};
 	};
+
+	i2c-gpio-4 {
+		compatible = "i2c-gpio";
+		sda-gpios = <&gpm2 0 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		scl-gpios = <&gpm2 1 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+
+		i2c-gpio,delay-us = <2>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		power_supply: charger@6 {
+			compatible = "summit,smb347";
+			reg = <0x6>;
+			summit,enable-usb-charging;
+			summit,enable-charge-control = <SMB3XX_CHG_ENABLE_SW>;
+			summit,fast-voltage-threshold-microvolt = <2600000>;
+			summit,chip-temperature-threshold-celsius = <130>;
+			summit,usb-current-limit-microamp = <1800000>;
+
+			monitored-battery = <&battery_cell>;
+		};
+	};
+
 };
 
 &adc {
-- 
2.25.1