dm: serial: Move baud rate calculation to ns16550.c
Move the function that calculates the baud rate divisor into ns16550.c so
it can be used by that file.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 079f67d..3f5f4ef 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -4,7 +4,7 @@
* modified to use CONFIG_SYS_ISA_MEM and new defines
*/
-#include <config.h>
+#include <common.h>
#include <ns16550.h>
#include <watchdog.h>
#include <linux/types.h>
@@ -45,6 +45,22 @@
#define CONFIG_SYS_NS16550_IER 0x00
#endif /* CONFIG_SYS_NS16550_IER */
+int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate)
+{
+ const unsigned int mode_x_div = 16;
+
+#ifdef CONFIG_OMAP1510
+ /* If can't cleanly clock 115200 set div to 1 */
+ if ((clock == 12000000) && (baudrate == 115200)) {
+ port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
+ return 1; /* return 1 for base divisor */
+ }
+ port->osc_12m_sel = 0; /* clear if previsouly set */
+#endif
+
+ return DIV_ROUND_CLOSEST(clock, mode_x_div * baudrate);
+}
+
void NS16550_init(NS16550_t com_port, int baud_divisor)
{
#if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_OMAP34XX))