drivers:adc:ltc2378: Add support for LTC2378-20

projects/ltc2378/Makefile

@@ -0,0 +1,9 @@
+EXAMPLE ?= basic
+
+include ../../tools/scripts/generic_variables.mk
+
+include ../../tools/scripts/examples.mk
+
+include src.mk
+
+include ../../tools/scripts/generic.mk

projects/ltc2378/builds.json

@@ -0,0 +1,10 @@
+{
+  "maxim": {
+    "basic_example": {
+      "flags": "EXAMPLE=basic TARGET=max32665"
+    },
+    "iio": {
+      "flags": "EXAMPLE=iio_example TARGET=max32665"
+    }
+  }
+}

projects/ltc2378/src.mk

@@ -0,0 +1,28 @@
+INCS += $(INCLUDE)/no_os_delay.h     \
+		$(INCLUDE)/no_os_error.h     \
+		$(INCLUDE)/no_os_gpio.h      \
+		$(INCLUDE)/no_os_print_log.h \
+		$(INCLUDE)/no_os_spi.h       \
+		$(INCLUDE)/no_os_alloc.h       \
+		$(INCLUDE)/no_os_irq.h      \
+		$(INCLUDE)/no_os_list.h      \
+		$(INCLUDE)/no_os_dma.h      \
+		$(INCLUDE)/no_os_uart.h      \
+		$(INCLUDE)/no_os_lf256fifo.h \
+		$(INCLUDE)/no_os_util.h 	\
+		$(INCLUDE)/no_os_units.h	\
+		$(INCLUDE)/no_os_mutex.h
+
+SRCS += $(DRIVERS)/api/no_os_gpio.c \
+		$(NO-OS)/util/no_os_lf256fifo.c \
+		$(DRIVERS)/api/no_os_irq.c  \
+		$(DRIVERS)/api/no_os_spi.c  \
+		$(DRIVERS)/api/no_os_uart.c \
+		$(DRIVERS)/api/no_os_dma.c \
+		$(NO-OS)/util/no_os_list.c \
+		$(NO-OS)/util/no_os_util.c \
+		$(NO-OS)/util/no_os_alloc.c \
+		$(NO-OS)/util/no_os_mutex.c
+
+INCS += $(DRIVERS)/adc/ltc2378/ltc2378.h
+SRCS += $(DRIVERS)/adc/ltc2378/ltc2378.c

projects/ltc2378/src/common/common_data.c

@@ -0,0 +1,81 @@
+/*******************************************************************************
+ *   @file   common_data.c
+ *   @brief  Defines common data to be used by ltc2378 examples.
+ *   @author Cherrence Sarip ([email protected])
+ ********************************************************************************
+ * Copyright 2025(c) Analog Devices, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of Analog Devices, Inc. nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. “AS IS” AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL ANALOG DEVICES, INC. BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************/
+
+#include "common_data.h"
+#include <stdbool.h>
+#include "parameters.h"
+
+struct no_os_uart_init_param uip = {
+	.device_id = UART_DEVICE_ID,
+	.irq_id = UART_IRQ_ID,
+	.asynchronous_rx = true,
+	.baud_rate = UART_BAUDRATE,
+	.size = NO_OS_UART_CS_8,
+	.parity = NO_OS_UART_PAR_NO,
+	.stop = NO_OS_UART_STOP_1_BIT,
+	.platform_ops = UART_OPS,
+	.extra = UART_EXTRA,
+};
+
+const struct no_os_spi_init_param ltc2378_spi_ip = {
+	.device_id = SPI_DEVICE_ID,
+	.max_speed_hz = SPI_MAX_SPEED,
+	.chip_select = SPI_CS,
+	.mode = NO_OS_SPI_MODE_0,
+	.bit_order = NO_OS_SPI_BIT_ORDER_MSB_FIRST,
+	.platform_ops = SPI_OPS,
+	.extra = SPI_EXTRA,
+	.parent = NULL,
+};
+
+const struct no_os_gpio_init_param ltc2378_gpio_cnv = {
+	.port = GPIO_CNV_PORT_NUM,
+	.number = GPIO_CNV_PIN_NUM,
+	.platform_ops = GPIO_OPS,
+	.extra = GPIO_EXTRA
+};
+
+const struct no_os_gpio_init_param ltc2378_gpio_busy = {
+	.port = GPIO_BUSY_PORT_NUM,
+	.number = GPIO_BUSY_PIN_NUM,
+	.platform_ops = GPIO_OPS,
+	.extra = GPIO_EXTRA
+};
+
+const struct ltc2378_init_param ltc2378_ip = {
+	.spi_init = &ltc2378_spi_ip,
+	.gpio_cnv_init = &ltc2378_gpio_cnv,
+	.gpio_busy_init = &ltc2378_gpio_busy,
+	.vref_uv = LTC2378_DEFAULT_VREF_UV,
+	.input_mode = LTC2378_UNIPOLAR
+};

projects/ltc2378/src/common/common_data.h

@@ -0,0 +1,48 @@
+/*******************************************************************************
+ *   @file   common_data.h
+ *   @brief  Defines common data to be used by ltc2378 examples.
+ *   @author Cherrence Sarip ([email protected])
+ ********************************************************************************
+ * Copyright 2025(c) Analog Devices, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of Analog Devices, Inc. nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. “AS IS” AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL ANALOG DEVICES, INC. BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************/
+#ifndef __COMMON_DATA_H__
+#define __COMMON_DATA_H__
+
+#include "parameters.h"
+#include "ltc2378.h"
+#include "no_os_spi.h"
+#include "iio_ltc2378.h"
+
+extern struct no_os_uart_init_param uip;
+
+extern const struct no_os_spi_init_param ltc2378_spi_ip;
+extern const struct no_os_gpio_init_param ltc2378_gpio_cnv;
+extern const struct no_os_gpio_init_param ltc2378_gpio_busy;
+extern const struct ltc2378_init_param ltc2378_ip;
+
+#endif /* __COMMON_DATA_H__ */

projects/ltc2378/src/examples/basic/basic_example.c

@@ -0,0 +1,100 @@
+/*******************************************************************************
+ *   @file   basic_example.c
+ *   @brief  Basic example code for ltc2378 project
+ *   @author Cherrence Sarip ([email protected])
+ ********************************************************************************
+ * Copyright 2025(c) Analog Devices, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of Analog Devices, Inc. nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. “AS IS” AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL ANALOG DEVICES, INC. BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************/
+
+#include "no_os_delay.h"
+#include "no_os_print_log.h"
+#include "no_os_spi.h"
+#include "no_os_util.h"
+#include "no_os_error.h"
+#include "common_data.h"
+#include "ltc2378.h"
+#include "parameters.h"
+#include <stdlib.h>
+#include "no_os_gpio.h"
+#include "maxim_gpio.h"
+
+/*****************************************************************************
+ * @brief Basic example main execution.
+ *
+ * @return ret - Result of the example execution. If working correctly, will
+ *               execute continuously the while(1) loop and will not return.
+ *******************************************************************************/
+
+int example_main()
+{
+	struct ltc2378_dev *dev;
+	int ret;
+
+	pr_info("Enter basic example \n");
+
+	struct no_os_uart_desc *uart_desc;
+
+	ret = no_os_uart_init(&uart_desc, &uip);
+	if (ret)
+		return ret;
+
+	no_os_uart_stdio(uart_desc);
+
+	ret = ltc2378_init(&dev, &ltc2378_ip);
+	if (ret) {
+		pr_info("Init failed: %d\n", ret);
+		return ret;
+	}
+
+	pr_info("VREF: %lu uV, Mode: %s\n",
+		dev->vref_uv,
+		(dev->input_mode == LTC2378_UNIPOLAR) ? "Unipolar" : "Bipolar");
+
+	while (1) {
+		uint32_t raw;
+		int32_t voltage_uv;
+
+		ret = ltc2378_read_raw(dev, &raw);
+		if (ret) {
+			pr_info("Read failed: %d\n", ret);
+			continue;
+		}
+
+		ret = ltc2378_raw_to_uv(dev, raw, &voltage_uv);
+		if (ret) {
+			pr_info("Convert failed: %d\n", ret);
+			continue;
+		}
+
+		pr_info("Raw: %lu, Voltage: %ld uV\n", raw, voltage_uv);
+
+		no_os_mdelay(BASIC_EXAMPLE_DELAY_MS);
+	}
+
+	return 0;
+}

projects/ltc2378/src/examples/iio_example/iio_example.c

@@ -0,0 +1,96 @@
+/********************************************************************************
+ *   @file   iio_example.c
+ *   @brief  IIO example code for the ltc2378 project
+ *   @author Cherrence Sarip ([email protected])
+ ********************************************************************************
+ * Copyright 2025(c) Analog Devices, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of Analog Devices, Inc. nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. “AS IS” AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL ANALOG DEVICES, INC. BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "no_os_alloc.h"
+#include "no_os_error.h"
+#include "no_os_units.h"
+#include "no_os_util.h"
+#include "no_os_print_log.h"
+
+#include "ltc2378.h"
+#include "iio_ltc2378.h"
+#include "iio_app.h"
+#include "common_data.h"
+
+/*******************************************************************************
+ * @brief IIO example main execution.
+ *
+ * @return ret - Result of the example execution. If working correctly, will
+ *               execute continuously function iio_app_run and will not return.
+ *******************************************************************************/
+int example_main()
+{
+	int ret;
+
+	struct ltc2378_iio_desc *ltc2378_iio_desc;
+	struct ltc2378_iio_desc_init_param ltc2378_iio_ip = {
+		.ltc2378_init_param = &ltc2378_ip,
+	};
+
+	struct iio_app_desc *app;
+	struct iio_app_init_param app_init_param = { 0 };
+
+	ret = ltc2378_iio_init(&ltc2378_iio_desc, &ltc2378_iio_ip);
+	if (ret)
+		goto exit;
+
+	struct iio_app_device iio_devices[] = {
+		{
+			.name = "ltc2378-20",
+			.dev = ltc2378_iio_desc,
+			.dev_descriptor = ltc2378_iio_desc->iio_dev,
+		},
+	};
+
+	app_init_param.devices = iio_devices;
+	app_init_param.nb_devices = NO_OS_ARRAY_SIZE(iio_devices);
+	app_init_param.uart_init_params = uip;
+
+	ret = iio_app_init(&app, app_init_param);
+	if (ret)
+		goto remove_iio_ltc2378;
+
+	ret = iio_app_run(app);
+
+	iio_app_remove(app);
+
+remove_iio_ltc2378:
+	ltc2378_iio_remove(ltc2378_iio_desc);
+exit:
+	if (ret)
+		pr_info("Error!\n");
+	return ret;
+}

projects/ltc2378/src/examples/iio_example/iio_example.mk

@@ -0,0 +1,3 @@
+IIOD = y
+INCS += $(DRIVERS)/adc/ltc2378/iio_ltc2378.h
+SRCS += $(DRIVERS)/adc/ltc2378/iio_ltc2378.c