zephyr: dev-posix: Enable battery charging

One hopes this is close to the minimum Kconfig and DT additions needed
to enable this feature. It brings in charger_task() which is the subject
of this effort.

BUG=b:218332694
TEST=with other changes, see that it can be built into dev-posix

Change-Id: Ifc42bbf92f92406514414b8df6e5a2b187cbfbe8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/4501285
Reviewed-by: Al Semjonovs <asemjonovs@google.com>
Commit-Queue: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>

4 files changed, 174 insertions, 1 deletions

diff --git a/zephyr/program/dev/CMakeLists.txt b/zephyr/program/dev/CMakeLists.txt
index c5a94d2b14..91ccb8c30d 100644
--- a/zephyr/program/dev/CMakeLists.txt
+++ b/zephyr/program/dev/CMakeLists.txt
@@ -6,4 +6,6 @@ cmake_minimum_required(VERSION 3.20.5)
 find_package(Zephyr REQUIRED HINTS "${ZEPHYR_BASE}")
 project(ec)
 
+target_sources(app PRIVATE src/stubs.c)
+
 zephyr_include_directories("${CMAKE_CURRENT_SOURCE_DIR}/include")
diff --git a/zephyr/program/dev/dev.dtsi b/zephyr/program/dev/dev.dtsi
index 253ac129c8..affe947bbe 100644
--- a/zephyr/program/dev/dev.dtsi
+++ b/zephyr/program/dev/dev.dtsi
@@ -6,18 +6,145 @@
 #include <board-overlays/native_posix.dts>
 
 / {
+	named-adc-channels {
+		compatible = "named-adc-channels";
+
+		adc_charger: charger {
+			enum-name = "ADC_TEMP_SENSOR_CHARGER";
+			io-channels = <&adc0 0>;
+		};
+	};
+
+	named-gpios {
+		ec_batt_pres_odl {
+			gpios = <&gpio0 28 GPIO_INPUT>;
+			enum-name = "GPIO_BATT_PRES_ODL";
+		};
+		gpio_usb_c0_bc12_int_l: usb_c0_bc12_int_l {
+			gpios = <&gpio0 10 GPIO_INPUT>;
+		};
+		gpio_usb_c0_ppc_int: usb_c0_ppc_int {
+			gpios = <&gpio0 14 (GPIO_INPUT | GPIO_ACTIVE_LOW)>;
+		};
+		gpio_acok_od: acok_od {
+			gpios = <&gpio0 0 GPIO_INPUT>;
+			enum-name = "GPIO_AC_PRESENT";
+		};
+	};
+
 	named-i2c-ports {
 		compatible = "named-i2c-ports";
 		accel-0 {
 			i2c-port = <&i2c0>;
-			enum-names = "I2C_PORT_ACCEL";
+			enum-names = "I2C_PORT_ACCEL",  "I2C_PORT_BATTERY";
+		};
+
+	};
+
+	adc0: adc {
+		compatible = "zephyr,adc-emul";
+		nchannels = <6>;
+		ref-internal-mv = <3300>;
+		#io-channel-cells = <1>;
+		status = "okay";
+	};
+
+	batteries {
+		default_battery: lgc_ac17a8m {
+			compatible = "lgc,ac17a8m", "battery-smart";
+			/**
+			 * this has to be strictly lower than the desired
+			 * voltage in smart battery emulator (5000mV).
+			 */
+			voltage_min = <4000>;
+		};
+	};
+
+	gpio-interrupts {
+		compatible = "cros-ec,gpio-interrupts";
+
+		int_usb_c0_bc12: usb_c0_bc12 {
+			irq-pin = <&gpio_usb_c0_bc12_int_l>;
+			flags = <GPIO_INT_EDGE_FALLING>;
+			handler = "usb0_evt";
+		};
+		int_ac_present: ac_present {
+			irq-pin = <&gpio_acok_od>;
+			flags = <GPIO_INT_EDGE_BOTH>;
+			handler = "extpower_interrupt";
+		};
+	};
+
+	usbc {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port0@0 {
+			compatible = "named-usbc-port";
+			reg = <0>;
+			bc12 = <&pi3usb9201_emul0>;
+			chg = <&isl923x_emul>;
+			tcpc = <&tcpci_emul>;
+			ppc = <&sn5s330_emul>;
+			usb-mux-chain-0 {
+				compatible = "cros-ec,usb-mux-chain";
+				usb-muxes = <&tcpci_mux_c0
+					     &virtual_mux_c0>;
+			};
+		};
+		port0-muxes {
+			tcpci_mux_c0: tcpci-mux-c0 {
+				compatible = "cros-ec,usbc-mux-tcpci";
+			};
+			virtual_mux_c0: virtual-mux-c0 {
+				compatible = "cros-ec,usbc-mux-virtual";
+			};
 		};
 	};
 };
 
 &i2c0 {
+	battery: sb@b {
+		compatible = "zephyr,smart-battery-emul";
+		reg = <0xb>;
+		cycle-count = <99>;
+		version = "BATTERY_SPEC_VER_1_1_WITH_PEC";
+		/* Real battery voltages are multiples of 4.4V. */
+		desired-charg-volt = <5000>;
+		desired-charg-cur = <1000>;
+		mf-name = "LGC";
+		dev-name = "AC17A8M";
+	};
+
 	bmi_i2c: bmi@68 {
 		compatible = "bosch,bmi160";
 		reg = <0x68>;
 	};
+
+	isl923x_emul: isl923x@9 {
+		compatible = "cros,isl923x-emul";
+		status = "okay";
+		reg = <0x9>;
+		battery = <&battery>;
+	};
+
+	pi3usb9201_emul0: pi3usb9201@5f {
+		compatible = "pericom,pi3usb9201";
+		reg = <0x5f>;
+		irq = <&int_usb_c0_bc12>;
+	};
+
+	sn5s330_emul: sn5s330@40 {
+		compatible = "cros,sn5s330-emul";
+		reg = <0x40>;
+		int-pin = <&gpio_usb_c0_ppc_int>;
+	};
+
+	tcpci_emul: tcpci_emul@2 {
+		compatible = "cros,tcpci-generic-emul";
+		status = "okay";
+		reg = <0x2>;
+		irq-gpios = <&gpio0 9 GPIO_ACTIVE_LOW>;
+		rst-gpios = <&gpio0 11 GPIO_ACTIVE_LOW>;
+	};
 };
diff --git a/zephyr/program/dev/prj.conf b/zephyr/program/dev/prj.conf
index 35bf59baea..b0fcc1f173 100644
--- a/zephyr/program/dev/prj.conf
+++ b/zephyr/program/dev/prj.conf
@@ -15,6 +15,23 @@ CONFIG_PLATFORM_EC_KEYBOARD=n
 CONFIG_PLATFORM_EC_POWER_BUTTON=n
 CONFIG_PLATFORM_EC_SWITCH=n
 CONFIG_PLATFORM_EC_VBOOT_EFS2=n
+CONFIG_PLATFORM_EC_VBOOT_HASH=n
+
+CONFIG_PLATFORM_EC=y
+CONFIG_PLATFORM_EC_HOOKS=y
+CONFIG_PLATFORM_EC_HOSTCMD=y
+CONFIG_PLATFORM_EC_CHARGER=y
+CONFIG_PLATFORM_EC_BATTERY_FUEL_GAUGE=y
+
+CONFIG_PLATFORM_EC_EXTPOWER_GPIO=y
+
+CONFIG_PLATFORM_EC_CHARGER_SENSE_RESISTOR=10
+CONFIG_PLATFORM_EC_CHARGER_SENSE_RESISTOR_AC=10
+CONFIG_PLATFORM_EC_CHARGER_ISL9238=y
+CONFIG_PLATFORM_EC_USB_PD_VBUS_MEASURE_CHARGER=y
+CONFIG_PLATFORM_EC_USB_PD_DISCHARGE_PPC=y
+
+CONFIG_PLATFORM_EC_USB_PD_TCPM_MUX=y
 
 CONFIG_NATIVE_UART_0_ON_STDINOUT=y
 
diff --git a/zephyr/program/dev/src/stubs.c b/zephyr/program/dev/src/stubs.c
new file mode 100644
index 0000000000..488289c7e4
--- /dev/null
+++ b/zephyr/program/dev/src/stubs.c
@@ -0,0 +1,27 @@
+/* Copyright 2023 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Fakes for dev-posix which will be updated as work progresses
+ */
+
+#include "usb_pd.h"
+
+int board_set_active_charge_port(int port)
+{
+	return 0;
+}
+
+int pd_check_vconn_swap(int port)
+{
+	return 0;
+}
+
+void pd_power_supply_reset(int port)
+{
+}
+
+int pd_set_power_supply_ready(int port)
+{
+	return 0;
+}