mirrors/u-boot
1
0
Fork 0
mirror of https://source.denx.de/u-boot/u-boot.git synced 2025-12-17 07:21:36 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

serial: zynq: Add support for slow emulation platform

Browse Source 
On slow platforms not all baudrate setting is valid.
Check it directly in the driver and setup maximum possible
frequency.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2015-04-15 13:05:06 +02:00
parent caacb33fd1
commit 04bc5c939a
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/serial/serial_zynq.c
View File

@ -48,10 +48,16 @@ static void uart_zynq_serial_setbrg(const int port)
/* Calculation results. */ /* Calculation results. */
unsigned int calc_bauderror, bdiv, bgen; unsigned int calc_bauderror, bdiv, bgen;
unsigned long calc_baud = 0; unsigned long calc_baud = 0;
unsigned long baud = gd->baudrate; unsigned long baud;
unsigned long clock = get_uart_clk(port); unsigned long clock = get_uart_clk(port);
struct uart_zynq *regs = uart_zynq_ports[port]; struct uart_zynq *regs = uart_zynq_ports[port];
/* Covering case where input clock is so slow */
if (clock < 1000000 && gd->baudrate > 4800)
gd->baudrate = 4800;
baud = gd->baudrate;
/* master clock /* master clock
* Baud rate = ------------------ * Baud rate = ------------------
* bgen * (bdiv + 1) * bgen * (bdiv + 1)