diff --git a/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11U6X/analogin_api.c b/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11U6X/analogin_api.c
index 697e8c19a6..0930d0fe5a 100644
--- a/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11U6X/analogin_api.c
+++ b/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11U6X/analogin_api.c
@@ -73,7 +73,7 @@ void analogin_init(analogin_t *obj, PinName pin) {
         tmp =  LPC_ADC->CTRL;
     } while ((tmp & (1UL << 30)) != 0);
 
-    LPC_ADC->CTRL = 100; // 500kHz sampling
+    LPC_ADC->CTRL = 1; // Sampling clock: SystemClock divided by 1
 }
 
 static inline uint32_t adc_read(analogin_t *obj) {
diff --git a/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC15XX/spi_api.c b/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC15XX/spi_api.c
index 9d38588e43..10e03656da 100644
--- a/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC15XX/spi_api.c
+++ b/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC15XX/spi_api.c
@@ -191,7 +191,7 @@ static inline int spi_read(spi_t *obj) {
     return obj->spi->RXDAT;
 }
 
-static inline int spi_busy(spi_t *obj) {
+int spi_busy(spi_t *obj) {
     // checking RXOV(Receiver Overrun interrupt flag)
     return obj->spi->STAT & (1 << 2);
     }