workaround for npm1300

boards/arm/nrf9131ek_nrf9131/CMakeLists.txt

@@ -0,0 +1,7 @@
+# Copyright (c) 2023 Nordic Semiconductor ASA.
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+
+if (CONFIG_BOARD_NRF9131EK_NRF9131 OR CONFIG_BOARD_NRF9131EK_NRF9131_NS)
+zephyr_library()
+zephyr_library_sources(npm1300.c)
+endif()

boards/arm/nrf9131ek_nrf9131/Kconfig

@@ -0,0 +1,18 @@
+# Thingy:91 nRF9161 board configuration
+#
+# Copyright (c) 2019 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+
+if BOARD_NRF9131EK_NRF9131 || BOARD_NRF9131EK_NRF9131_NS
+
+config BOARD_INIT_PRIORITY
+	int "Initialization priority for board configuration"
+	default 80
+
+endif # BOARD_NRF9131EK_NRF9131 || BOARD_NRF9131EK_NRF9131_NS
+
+module=BOARD
+module-dep=LOG
+module-str=Log level for board
+source "${ZEPHYR_BASE}/subsys/logging/Kconfig.template.log_config"

boards/arm/nrf9131ek_nrf9131/npm1300.c

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2023 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/init.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/device.h>
+#include <zephyr/drivers/i2c.h>
+
+LOG_MODULE_REGISTER(board_secure, CONFIG_BOARD_LOG_LEVEL);
+
+#define CHECKERR if (err) {LOG_ERR("I2C error: %d", err); return err;}
+
+static const struct i2c_dt_spec pmic = I2C_DT_SPEC_GET(DT_NODELABEL(pmic_main));
+
+static int pmic_write_reg(uint16_t address, uint8_t value)
+{
+	uint8_t buf[] = {
+		address >> 8,
+		address & 0xFF,
+		value,
+	};
+
+	return i2c_write_dt(&pmic, buf, ARRAY_SIZE(buf));
+}
+
+static int thingy91x_board_init(void)
+{
+	int err = 0;
+
+	if (!device_is_ready(pmic.bus)) {
+		LOG_ERR("cannot reach PMIC!");
+		return -ENODEV;
+	}
+
+	// disable charger for config
+	err = pmic_write_reg(0x0305, 0x03); CHECKERR;
+
+	// set VBUS current limit 500mA 
+	err = pmic_write_reg(0x0201, 0x00); CHECKERR;
+	err = pmic_write_reg(0x0202, 0x00); CHECKERR;
+	err = pmic_write_reg(0x0200, 0x01); CHECKERR;
+
+	// enable charger
+	err = pmic_write_reg(0x0304, 0x03); CHECKERR;
+
+	return err;
+}
+
+SYS_INIT(thingy91x_board_init, POST_KERNEL, CONFIG_BOARD_INIT_PRIORITY);