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From: Stephan Gerhold <stephan@gerhold.net>
To: Andy Gross <agross@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
	Stephan Gerhold <stephan@gerhold.net>,
	Michael Srba <Michael.Srba@seznam.cz>
Subject: [RFC PATCH] arm64: dts: qcom: Add device tree for Samsung Galaxy A3U/A5U
Date: Mon, 24 Jun 2019 19:33:43 +0200
Message-ID: <20190624173341.5826-1-stephan@gerhold.net> (raw)

Samsung Galaxy A3 (SM-A300FU) and Samsung Galaxy A5 (SM-A500FU)
are smartphones using the MSM8916 SoC released in 2015.

Add a device tree for A3U and A5U with initial support for:
  - SDHCI (internal and external storage)
  - USB Device Mode
  - UART (on USB connector via the SM5502 MUIC)
  - Regulators

The two devices (and all other variants of A3/A5 released in 2015)
are very similar, with some differences in display, touchscreen
and sensors. The common parts are shared in
msm8916-samsung-a2015-common.dtsi to reduce duplication.

The device tree is loosely based on apq8016-sbc.dtsi and the
downstream kernel provided by Samsung, mixed with a lot of own
research.

Co-developed-by: Michael Srba <Michael.Srba@seznam.cz>
Signed-off-by: Michael Srba <Michael.Srba@seznam.cz>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
---
The idea is to leverage the efforts that went into mainline for
the Dragonboard 410c. So far this is going quite well.

In addition to the functionality provided by this patch,
the following features also seem to work in initial tests:

  - Display/GPU
  - Touchscreen
  - Sound (Earpiece and Headphones)
  - Accelerometer + Magnetometer

Those will be added in future patch sets.

The primary known limitation is the lack of PSCI support in the
signed TrustZone firmware. It seems like all production MSM8916
smartphones were released without PSCI support, and only DB410c
was updated. Not sure if there is any good solution for this...

 arch/arm64/boot/dts/qcom/Makefile             |   2 +
 .../msm8916-samsung-a2015-common-pins.dtsi    |  15 ++
 .../qcom/msm8916-samsung-a2015-common.dtsi    | 226 ++++++++++++++++++
 .../boot/dts/qcom/msm8916-samsung-a3u-eur.dts |  10 +
 .../boot/dts/qcom/msm8916-samsung-a5u-eur.dts |  10 +
 5 files changed, 263 insertions(+)
 create mode 100644 arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common-pins.dtsi
 create mode 100644 arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi
 create mode 100644 arch/arm64/boot/dts/qcom/msm8916-samsung-a3u-eur.dts
 create mode 100644 arch/arm64/boot/dts/qcom/msm8916-samsung-a5u-eur.dts

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index b3fe72ff2955..d07d9098cccf 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -3,6 +3,8 @@ dtb-$(CONFIG_ARCH_QCOM)	+= apq8016-sbc.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= apq8096-db820c.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= ipq8074-hk01.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-mtp.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-samsung-a3u-eur.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-samsung-a5u-eur.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= msm8992-bullhead-rev-101.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= msm8994-angler-rev-101.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= msm8996-mtp.dtb
diff --git a/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common-pins.dtsi b/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common-pins.dtsi
new file mode 100644
index 000000000000..58e0d827526d
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common-pins.dtsi
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+&msmgpio {
+	muic_int_default: muic_int_default {
+		pinmux {
+			function = "gpio";
+			pins = "gpio12";
+		};
+		pinconf {
+			pins = "gpio12";
+			drive-strength = <2>;
+			bias-disable;
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi b/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi
new file mode 100644
index 000000000000..e756b6a39fe9
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi
@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "msm8916.dtsi"
+#include "pm8916.dtsi"
+#include "msm8916-samsung-a2015-common-pins.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	aliases {
+		serial0 = &blsp1_uart2;
+	};
+
+	chosen {
+		stdout-path = "serial0";
+	};
+
+	soc {
+		i2c-muic {
+			compatible = "i2c-gpio";
+			sda-gpios = <&msmgpio 105 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+			scl-gpios = <&msmgpio 106 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			muic: sm5502@25 {
+				compatible = "siliconmitus,sm5502-muic";
+
+				reg = <0x25>;
+				interrupt-parent = <&msmgpio>;
+				interrupts = <12 IRQ_TYPE_EDGE_FALLING>;
+
+				pinctrl-names = "default";
+				pinctrl-0 = <&muic_int_default>;
+			};
+		};
+
+		sdhci@7824000 {
+			status = "okay";
+
+			vmmc-supply = <&pm8916_l8>;
+			vqmmc-supply = <&pm8916_l5>;
+
+			pinctrl-names = "default", "sleep";
+			pinctrl-0 = <&sdc1_clk_on &sdc1_cmd_on &sdc1_data_on>;
+			pinctrl-1 = <&sdc1_clk_off &sdc1_cmd_off &sdc1_data_off>;
+		};
+
+		sdhci@7864000 {
+			status = "okay";
+
+			vmmc-supply = <&pm8916_l11>;
+			vqmmc-supply = <&pm8916_l12>;
+
+			pinctrl-names = "default", "sleep";
+			pinctrl-0 = <&sdc2_clk_on &sdc2_cmd_on &sdc2_data_on &sdc2_cd_on>;
+			pinctrl-1 = <&sdc2_clk_off &sdc2_cmd_off &sdc2_data_off &sdc2_cd_off>;
+
+			cd-gpios = <&msmgpio 38 GPIO_ACTIVE_LOW>;
+		};
+
+		serial@78b0000 {
+			status = "okay";
+			pinctrl-names = "default", "sleep";
+			pinctrl-0 = <&blsp1_uart2_default>;
+			pinctrl-1 = <&blsp1_uart2_sleep>;
+		};
+
+		usb@78d9000 {
+			status = "okay";
+			extcon = <&muic>;
+
+			hnp-disable;
+			srp-disable;
+			adp-disable;
+
+			ulpi {
+				phy {
+					extcon = <&muic>;
+					v1p8-supply = <&pm8916_l7>;
+					v3p3-supply = <&pm8916_l13>;
+				};
+			};
+		};
+
+		/*
+		 * Attempting to enable these devices causes a "synchronous
+		 * external abort". Suspected cause is that the debug power
+		 * domain is not enabled by default on this device.
+		 * Disable these devices for now to avoid the crash.
+		 *
+		 * See: https://lore.kernel.org/linux-arm-msm/20190618202623.GA53651@gerhold.net/
+		 */
+		tpiu@820000 { status = "disabled"; };
+		funnel@821000 { status = "disabled"; };
+		replicator@824000 { status = "disabled"; };
+		etf@825000 { status = "disabled"; };
+		etr@826000 { status = "disabled"; };
+		funnel@841000 { status = "disabled"; };
+		debug@850000 { status = "disabled"; };
+		debug@852000 { status = "disabled"; };
+		debug@854000 { status = "disabled"; };
+		debug@856000 { status = "disabled"; };
+		etm@85c000 { status = "disabled"; };
+		etm@85d000 { status = "disabled"; };
+		etm@85e000 { status = "disabled"; };
+		etm@85f000 { status = "disabled"; };
+	};
+};
+
+&smd_rpm_regulators {
+	vdd_l1_l2_l3-supply = <&pm8916_s3>;
+	vdd_l4_l5_l6-supply = <&pm8916_s4>;
+	vdd_l7-supply = <&pm8916_s4>;
+
+	s1 {
+		regulator-min-microvolt = <500000>;
+		regulator-max-microvolt = <1300000>;
+	};
+
+	s3 {
+		regulator-min-microvolt = <1200000>;
+		regulator-max-microvolt = <1300000>;
+	};
+
+	s4 {
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	l1 {
+		regulator-min-microvolt = <1225000>;
+		regulator-max-microvolt = <1225000>;
+	};
+
+	l2 {
+		regulator-min-microvolt = <1200000>;
+		regulator-max-microvolt = <1200000>;
+	};
+
+	l3 {
+		regulator-min-microvolt = <500000>;
+		regulator-max-microvolt = <1287500>;
+	};
+
+	l4 {
+		regulator-min-microvolt = <2050000>;
+		regulator-max-microvolt = <2050000>;
+	};
+
+	l5 {
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+	};
+
+	l6 {
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+	};
+
+	l7 {
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+	};
+
+	l8 {
+		regulator-min-microvolt = <2850000>;
+		regulator-max-microvolt = <2900000>;
+	};
+
+	l9 {
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
+	l10 {
+		regulator-min-microvolt = <2700000>;
+		regulator-max-microvolt = <2800000>;
+	};
+
+	l11 {
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <2950000>;
+		regulator-allow-set-load;
+		regulator-system-load = <200000>;
+	};
+
+	l12 {
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <2950000>;
+	};
+
+	l13 {
+		regulator-min-microvolt = <3075000>;
+		regulator-max-microvolt = <3075000>;
+	};
+
+	l14 {
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
+	l15 {
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
+	l16 {
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+	};
+
+	l17 {
+		regulator-min-microvolt = <2850000>;
+		regulator-max-microvolt = <3100000>;
+	};
+
+	l18 {
+		regulator-min-microvolt = <2700000>;
+		regulator-max-microvolt = <2700000>;
+	};
+};
diff --git a/arch/arm64/boot/dts/qcom/msm8916-samsung-a3u-eur.dts b/arch/arm64/boot/dts/qcom/msm8916-samsung-a3u-eur.dts
new file mode 100644
index 000000000000..d10f7ac5089f
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/msm8916-samsung-a3u-eur.dts
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/dts-v1/;
+
+#include "msm8916-samsung-a2015-common.dtsi"
+
+/ {
+	model = "Samsung Galaxy A3U (EUR)";
+	compatible = "samsung,a3u-eur", "qcom,msm8916";
+};
diff --git a/arch/arm64/boot/dts/qcom/msm8916-samsung-a5u-eur.dts b/arch/arm64/boot/dts/qcom/msm8916-samsung-a5u-eur.dts
new file mode 100644
index 000000000000..1aa59da98495
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/msm8916-samsung-a5u-eur.dts
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/dts-v1/;
+
+#include "msm8916-samsung-a2015-common.dtsi"
+
+/ {
+	model = "Samsung Galaxy A5U (EUR)";
+	compatible = "samsung,a5u-eur", "qcom,msm8916";
+};
-- 
2.22.0


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