Simon, > -----Original Message----- > From: Simon Glass [mailto:[email protected]] > Sent: Friday, March 09, 2012 1:33 PM > To: U-Boot Mailing List > Cc: Tom Warren; Stephen Warren; Simon Glass > Subject: [PATCH v2 1/4] ns16550: Add function to drain serial output
This patch series (v2, 1-4) works for me on my Seaboard - I get a message about 'No valid fdt found', etc. So: Tested-by: Tom Warren <[email protected]> Acked-by: Tom Warren <[email protected]> If no one objects, I'll apply this series, and Stephen's 'Makefile: fdt: Make the final build result be u-boot.bin' patch (which also works OK, BTW) to my previous pull request and resend to Albert. Tom -- nvpublic > > Sometimes we want to be sure that the output FIFO has fully drained (e.g. > because we are about to reset or the port or reset the board). Add a > function for this. > > Signed-off-by: Simon Glass <[email protected]> > --- > Changes in v2: > - Add function to drain the ns16550's FIFO > > drivers/serial/ns16550.c | 11 +++++++++++ > include/ns16550.h | 3 +++ > 2 files changed, 14 insertions(+), 0 deletions(-) > > diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index > 0c23955..a082112 100644 > --- a/drivers/serial/ns16550.c > +++ b/drivers/serial/ns16550.c > @@ -6,6 +6,7 @@ > > #include <config.h> > #include <ns16550.h> > +#include <common.h> > #include <watchdog.h> > #include <linux/types.h> > #include <asm/io.h> > @@ -115,4 +116,14 @@ int NS16550_tstc(NS16550_t com_port) > return (serial_in(&com_port->lsr) & UART_LSR_DR) != 0; } > > +/* Wait for the UART's output buffer and holding register to drain */ > +void NS16550_drain(NS16550_t regs) { > + u32 mask = UART_LSR_TEMT | UART_LSR_THRE; > + > + /* Wait for the UART to finish sending */ > + while ((serial_in(®s->lsr) & mask) != mask) > + udelay(100); > +} > + > #endif /* CONFIG_NS16550_MIN_FUNCTIONS */ diff --git a/include/ns16550.h > b/include/ns16550.h index e9d2eda..16b3828 100644 > --- a/include/ns16550.h > +++ b/include/ns16550.h > @@ -166,4 +166,7 @@ void NS16550_init(NS16550_t com_port, int baud_divisor); > void NS16550_putc(NS16550_t com_port, char c); char NS16550_getc(NS16550_t > com_port); int NS16550_tstc(NS16550_t com_port); > + > +/* Wait for the UART's output buffer and holding register to drain */ > +void NS16550_drain(NS16550_t regs); > void NS16550_reinit(NS16550_t com_port, int baud_divisor); > -- > 1.7.7.3 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
