fix(PeriphDrivers): Fix LPUART GetClockSource Settings for MAX32655 a…

…nd MAX78000 (#1119)

Co-authored-by: EricB-ADI <eric.busch@analogdevices.com>
Co-authored-by: EricB-ADI <122300463+EricB-ADI@users.noreply.github.com>

Libraries/PeriphDrivers/Include/MAX32680/uart.h

@@ -261,6 +261,15 @@ int MXC_UART_SetFlowCtrl(mxc_uart_regs_t *uart, mxc_uart_flow_t flowCtrl, int rt
  */
 int MXC_UART_SetClockSource(mxc_uart_regs_t *uart, mxc_uart_clock_t clock);
 
+/**
+ * @brief Gets the clock source used for the UART instance
+ * 
+ * @param uart Pointer to UART registers (selects the UART block used.)
+ *
+ * @return The selected clock source for the UART instance
+ */
+mxc_uart_clock_t MXC_UART_GetClockSource(mxc_uart_regs_t *uart);
+
 /* ************************************************************************* */
 /* Low-level functions */
 /* ************************************************************************* */

Libraries/PeriphDrivers/Source/UART/uart_ai85.c

@@ -301,9 +301,9 @@ mxc_uart_clock_t MXC_UART_GetClockSource(mxc_uart_regs_t *uart)
  break;
  case 3:
  switch (clock_option) {
- case 0:
+ case 2:
  return MXC_UART_IBRO_CLK;
- case 1:
+ case 3:
  return MXC_UART_ERTCO_CLK;
  default:
  return E_BAD_STATE;

Libraries/PeriphDrivers/Source/UART/uart_me17.c

@@ -82,7 +82,6 @@ int MXC_UART_Init(mxc_uart_regs_t *uart, unsigned int baud, mxc_uart_clock_t clo
  if (retval != E_NO_ERROR) {
  return retval;
  }
-
  return MXC_UART_RevB_Init((mxc_uart_revb_regs_t *)uart, baud, MXC_UART_GetClockSource(uart));
 }
 
@@ -320,9 +319,9 @@ mxc_uart_clock_t MXC_UART_GetClockSource(mxc_uart_regs_t *uart)
  break;
  case 3:
  switch (clock_option) {
- case 0:
+ case 2:
  return MXC_UART_IBRO_CLK;
- case 1:
+ case 3:
  return MXC_UART_ERTCO_CLK;
  default:
  return E_BAD_STATE;