diff --git a/src/iol_osal/osal_irq.c b/src/iol_osal/osal_irq.c
index 1e9161e..df59184 100644
--- a/src/iol_osal/osal_irq.c
+++ b/src/iol_osal/osal_irq.c
@@ -25,11 +25,12 @@ int _iolink_setup_int_zephyr (const struct device * port, gpio_pin_t pin, isr_fu
     if (!device_is_ready(port)) {
         return -ENODEV;
     }
-    gpio_pin_configure(port, pin, GPIO_ACTIVE_LOW | GPIO_INPUT );
+    int rc = gpio_pin_configure(port, pin, GPIO_ACTIVE_LOW | GPIO_INPUT | GPIO_PULL_UP );
     struct gpio_cb_data * cb_data = (struct gpio_cb_data *)malloc(sizeof(struct gpio_cb_data));
     cb_data->arg = irq_arg;
     cb_data->isr_func = isr_func;
     gpio_init_callback(&cb_data->zephyr_data, gpio_cb, BIT(pin));
     gpio_add_callback(port, &cb_data->zephyr_data);
-    return 0;
+    rc =  gpio_pin_interrupt_configure(port,pin,GPIO_INT_EDGE_TO_ACTIVE);
+    return rc == 0;
 }
\ No newline at end of file
diff --git a/src/iol_osal/osal_spi.c b/src/iol_osal/osal_spi.c
index c482bf2..69ac520 100644
--- a/src/iol_osal/osal_spi.c
+++ b/src/iol_osal/osal_spi.c
@@ -4,18 +4,27 @@
 
 #include <zephyr/drivers/spi.h>
 #include <zephyr/device.h>
+#include <zephyr/drivers/gpio.h>
 #include <osal_spi.h>
 
+static const struct gpio_dt_spec cs_pin = GPIO_DT_SPEC_GET(DT_ALIAS(iolm_cs), gpios);
+
+static const struct spi_cs_control iolm_cs_pin={
+    cs_pin,0
+}; 
+
 // TODO check SPI cfg required for MAX14819
 static struct spi_config spi_cfg = {
-    .frequency = 0U,
+    .frequency = 20000000U,
     .operation = {{SPI_WORD_SET(8) | SPI_TRANSFER_MSB | SPI_OP_MODE_MASTER}},
     .slave = 0U,
-    .cs = {NULL}
+    .cs = NULL
 };
 
 void * _iolink_pl_hw_spi_init (const char * device)
 {
+    gpio_pin_configure_dt(&cs_pin,GPIO_OUTPUT);
+    gpio_pin_set_dt(&cs_pin,0);
     const struct device * spi_dev = (struct device *) device;
     if(device_is_ready(spi_dev)!=true) {
         return NULL;
@@ -39,10 +48,11 @@ void _iolink_pl_hw_spi_transfer (
 	const struct spi_buf rx_buf = {.buf=data_read, .len=n_bytes_to_transfer};
 	struct spi_buf_set tx_set = {.buffers=&tx_buf, .count=1};
 	struct spi_buf_set rx_set = {.buffers=&rx_buf, .count=1};
+    gpio_pin_set_dt(&cs_pin,1);
 	const int spi_res = spi_transceive(spi_dev,
 										&spi_cfg,
 										&tx_set,
 										&rx_set);
+    gpio_pin_set_dt(&cs_pin,0);
     // TODO log error, check how to deal with LOG_DBG
-
 }
\ No newline at end of file