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author | Tom Rini <trini@ti.com> | 2013-04-15 11:46:11 (GMT) |
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committer | Tom Rini <trini@ti.com> | 2013-04-15 11:46:11 (GMT) |
commit | 17059f972fa6768ebf15a575c00083b3a431b79a (patch) | |
tree | 30df6b88fa1dc57dada54f9a16ab1619cc4f3c52 /drivers/serial/ns16550.c | |
parent | 277f037074fbb73be10a7bff27079b6eb0a3bfbb (diff) | |
parent | 8960af8ba9488fc54e2e4733cbada26d3cece225 (diff) | |
download | u-boot-17059f972fa6768ebf15a575c00083b3a431b79a.tar.xz |
Merge branch 'master' of git://git.denx.de/u-boot-arm
Diffstat (limited to 'drivers/serial/ns16550.c')
-rw-r--r-- | drivers/serial/ns16550.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index ed4e6b3..7f013ab 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -36,10 +36,24 @@ void NS16550_init(NS16550_t com_port, int baud_divisor) { -#if (!defined(CONFIG_SYS_NS16550_BROKEN_TEMT)) +#if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_OMAP34XX)) + /* + * On some OMAP3 devices when UART3 is configured for boot mode before + * SPL starts only THRE bit is set. We have to empty the transmitter + * before initialization starts. + */ + if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE)) + == UART_LSR_THRE) { + serial_out(UART_LCR_DLAB, &com_port->lcr); + serial_out(baud_divisor & 0xff, &com_port->dll); + serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm); + serial_out(UART_LCRVAL, &com_port->lcr); + serial_out(0, &com_port->mdr1); + } +#endif + while (!(serial_in(&com_port->lsr) & UART_LSR_TEMT)) ; -#endif serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier); #if (defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)) || \ |