serial: 16550: Add getfcr accessor
Add function which allows fetching the default FCR register setting
from platform data for DM , while retaining old behavior for non-DM
by returning UART_FCRVAL.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 6e9b946..3c9f3b0 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -121,6 +121,13 @@
return serial_in_shift(addr + plat->reg_offset, plat->reg_shift);
}
+static u32 ns16550_getfcr(NS16550_t port)
+{
+ struct ns16550_platdata *plat = port->plat;
+
+ return plat->fcr;
+}
+
/* We can clean these up once everything is moved to driver model */
#define serial_out(value, addr) \
ns16550_writeb(com_port, \
@@ -128,6 +135,11 @@
#define serial_in(addr) \
ns16550_readb(com_port, \
(unsigned char *)addr - (unsigned char *)com_port)
+#else
+static u32 ns16550_getfcr(NS16550_t port)
+{
+ return UART_FCRVAL;
+}
#endif
int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate)
@@ -171,7 +183,7 @@
serial_out(0x7, &com_port->mdr1); /* mode select reset TL16C750*/
#endif
serial_out(UART_MCRVAL, &com_port->mcr);
- serial_out(UART_FCRVAL, &com_port->fcr);
+ serial_out(ns16550_getfcr(com_port), &com_port->fcr);
if (baud_divisor != -1)
NS16550_setbrg(com_port, baud_divisor);
#if defined(CONFIG_OMAP) || \
@@ -192,7 +204,7 @@
serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
NS16550_setbrg(com_port, 0);
serial_out(UART_MCRVAL, &com_port->mcr);
- serial_out(UART_FCRVAL, &com_port->fcr);
+ serial_out(ns16550_getfcr(com_port), &com_port->fcr);
NS16550_setbrg(com_port, baud_divisor);
}
#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
@@ -420,6 +432,8 @@
return -EINVAL;
}
+ plat->fcr = UART_FCRVAL;
+
return 0;
}
#endif
diff --git a/include/ns16550.h b/include/ns16550.h
index 1311f4c..45fd68b 100644
--- a/include/ns16550.h
+++ b/include/ns16550.h
@@ -57,6 +57,7 @@
int reg_shift;
int clock;
int reg_offset;
+ u32 fcr;
};
struct udevice;