From ed68ef5678cfbd14f1435f30d76edbfe319dc5f7 Mon Sep 17 00:00:00 2001
From: Guillaume Lager <g.lager@innoseis.com>
Date: Mon, 30 Aug 2021 12:05:24 +0200
Subject: [PATCH] samples: tmp116: Add access to eeprom

Add read access to internal tmp116 eeprom which
contains the device unique id after manufacturing

Signed-off-by: Guillaume Lager <g.lager@innoseis.com>
---
 .../tmp116/boards/nucleo_f401re.overlay       |  9 ++++++++
 samples/sensor/tmp116/prj.conf                |  4 ++++
 samples/sensor/tmp116/src/main.c              | 22 ++++++++++++++++---
 3 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/samples/sensor/tmp116/boards/nucleo_f401re.overlay b/samples/sensor/tmp116/boards/nucleo_f401re.overlay
index 3ba3e8d4843..1ad19f76a7b 100644
--- a/samples/sensor/tmp116/boards/nucleo_f401re.overlay
+++ b/samples/sensor/tmp116/boards/nucleo_f401re.overlay
@@ -10,6 +10,15 @@
 		compatible = "ti,tmp116";
 		reg = <0x4B>;
 		label = "TMP116";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		eeprom: ti_tmp116_eeprom@0 {
+			compatible = "ti,tmp116-eeprom";
+			reg = <0x0>;
+			label = "TMP116_EEPROM";
+			read-only;
+		};
 	};
 
 };
diff --git a/samples/sensor/tmp116/prj.conf b/samples/sensor/tmp116/prj.conf
index 0555ec27e50..667f5896540 100644
--- a/samples/sensor/tmp116/prj.conf
+++ b/samples/sensor/tmp116/prj.conf
@@ -1,4 +1,8 @@
 CONFIG_STDOUT_CONSOLE=y
 CONFIG_I2C=y
 CONFIG_SENSOR=y
+CONFIG_SENSOR_INIT_PRIORITY=90
 CONFIG_TMP116=y
+CONFIG_EEPROM=y
+CONFIG_EEPROM_INIT_PRIORITY=91
+CONFIG_EEPROM_TMP116=y
diff --git a/samples/sensor/tmp116/src/main.c b/samples/sensor/tmp116/src/main.c
index 86d661fda1f..4f7a3cda355 100644
--- a/samples/sensor/tmp116/src/main.c
+++ b/samples/sensor/tmp116/src/main.c
@@ -7,12 +7,17 @@
 #include <zephyr.h>
 #include <device.h>
 #include <drivers/sensor.h>
+#include <drivers/eeprom.h>
+#include <drivers/sensor/tmp116.h>
 #include <sys/printk.h>
 #include <sys/__assert.h>
 
+static uint8_t eeprom_content[EEPROM_TMP116_SIZE];
+
 void main(void)
 {
-	const struct device *dev;
+	const struct device *dev = DEVICE_DT_GET(DT_INST(0, ti_tmp116));
+	const struct device *eeprom = DEVICE_DT_GET(DT_INST(0, ti_tmp116_eeprom));
 	struct sensor_value temp_value;
 
 	/* offset to be added to the temperature
@@ -21,11 +26,22 @@ void main(void)
 	struct sensor_value offset_value;
 	int ret;
 
-	dev = device_get_binding(DT_LABEL(DT_INST(0, ti_tmp116)));
-	__ASSERT(dev != NULL, "Failed to get TMP116 device binding");
+	__ASSERT(device_is_ready(dev), "TMP116 device not ready");
+	__ASSERT(device_is_ready(eeprom), "TMP116 eeprom device not ready");
 
 	printk("Device %s - %p is ready\n", dev->name, dev);
 
+	ret = eeprom_read(eeprom, 0, eeprom_content, sizeof(eeprom_content));
+	if (ret == 0) {
+		printk("eeprom content %02x%02x%02x%02x%02x%02x%02x%02x\n",
+		       eeprom_content[0], eeprom_content[1],
+		       eeprom_content[2], eeprom_content[3],
+		       eeprom_content[4], eeprom_content[5],
+		       eeprom_content[6], eeprom_content[7]);
+	} else {
+		printk("Failed to get eeprom content\n");
+	}
+
 	/*
 	 * if an offset of 2.5 oC is to be added,
 	 * set val1 = 2 and val2 = 500000.