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 <[email protected]> Cc: Tom Rini <[email protected]> Cc: Simon Glass <[email protected]> --- V2: If CONFIG_DM_SERIAL and DEBUG_UART are enabled, the ns16550_getfcr() can be invoked with NULL plat data . Check for this case and return the default UART_FCRVAL then. --- drivers/serial/ns16550.c | 20 +++++++++++++++++--- include/ns16550.h | 1 + 2 files changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index c6cb3eb..b7ff3d7 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -120,6 +120,13 @@ static int ns16550_readb(NS16550_t port, int offset) 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 ? plat->fcr : UART_FCRVAL; +} + /* We can clean these up once everything is moved to driver model */ #define serial_out(value, addr) \ ns16550_writeb(com_port, \ @@ -127,6 +134,11 @@ static int ns16550_readb(NS16550_t port, int offset) #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) @@ -170,7 +182,7 @@ void NS16550_init(NS16550_t com_port, int baud_divisor) 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) || \ @@ -191,7 +203,7 @@ void NS16550_reinit(NS16550_t com_port, int baud_divisor) 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 */ @@ -262,7 +274,7 @@ static inline void _debug_uart_init(void) CONFIG_BAUDRATE); serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER); serial_dout(&com_port->mcr, UART_MCRVAL); - serial_dout(&com_port->fcr, UART_FCRVAL); + serial_dout(&com_port->fcr, ns16550_getfcr(com_port)); serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL); serial_dout(&com_port->dll, baud_divisor & 0xff); @@ -405,6 +417,8 @@ int ns16550_serial_ofdata_to_platdata(struct udevice *dev) 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 @@ struct ns16550_platdata { int reg_shift; int clock; int reg_offset; + u32 fcr; }; struct udevice; -- 2.7.0 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
