diff --git a/thermosphere/src/car.c b/thermosphere/src/car.c
index 05b603364..d23635eaa 100644
--- a/thermosphere/src/car.c
+++ b/thermosphere/src/car.c
@@ -68,10 +68,10 @@ static inline uint32_t get_clk_source_val(CarDevice dev) {
 
 static inline uint32_t get_clk_source_div(CarDevice dev) {
     switch (dev) {
-        case CARDEVICE_UARTA: return 1 << 24; // enable bit
-        case CARDEVICE_UARTB: return 1 << 24; // enable bit
-        case CARDEVICE_UARTC: return 1 << 24; // enable bit
-        case CARDEVICE_UARTD: return 1 << 24; // enable bit
+        case CARDEVICE_UARTA: return 0;
+        case CARDEVICE_UARTB: return 0;
+        case CARDEVICE_UARTC: return 0;
+        case CARDEVICE_UARTD: return 0;
         case CARDEVICE_I2C1: return 0;
         case CARDEVICE_I2C5: return 0;
         case CARDEVICE_TZRAM: return 0;
diff --git a/thermosphere/src/uart.c b/thermosphere/src/uart.c
index 3e83a6a8e..747157018 100644
--- a/thermosphere/src/uart.c
+++ b/thermosphere/src/uart.c
@@ -26,26 +26,26 @@ void uart_config(UartDevice dev) {
     
     switch (dev) {
         case UART_A:
-            pinmux->uart1_rx = 0;
-            pinmux->uart1_tx = (PINMUX_INPUT | PINMUX_PULL_UP);
+            pinmux->uart1_tx = 0;
+            pinmux->uart1_rx = (PINMUX_INPUT | PINMUX_PULL_UP);
             pinmux->uart1_rts = 0;
             pinmux->uart1_cts = (PINMUX_INPUT | PINMUX_PULL_DOWN);
             break;
         case UART_B:
-            pinmux->uart2_rx = 0;
-            pinmux->uart2_tx = (PINMUX_INPUT | PINMUX_PULL_UP);
+            pinmux->uart2_tx = 0;
+            pinmux->uart2_rx = (PINMUX_INPUT | PINMUX_PULL_UP);
             pinmux->uart2_rts = 0;
             pinmux->uart2_cts = (PINMUX_INPUT | PINMUX_PULL_DOWN);
             break;
         case UART_C:
-            pinmux->uart3_rx = 0;
-            pinmux->uart3_tx = (PINMUX_INPUT | PINMUX_PULL_UP);
+            pinmux->uart3_tx = 0;
+            pinmux->uart3_rx = (PINMUX_INPUT | PINMUX_PULL_UP);
             pinmux->uart3_rts = 0;
             pinmux->uart3_cts = (PINMUX_INPUT | PINMUX_PULL_DOWN);
             break;
         case UART_D:
-            pinmux->uart4_rx = 0;
-            pinmux->uart4_tx = (PINMUX_INPUT | PINMUX_PULL_UP);
+            pinmux->uart4_tx = 0;
+            pinmux->uart4_rx = (PINMUX_INPUT | PINMUX_PULL_UP);
             pinmux->uart4_rts = 0;
             pinmux->uart4_cts = (PINMUX_INPUT | PINMUX_PULL_DOWN);
             break;