From: Michal Simek Date: Wed, 15 Apr 2015 11:05:06 +0000 (+0200) Subject: serial: zynq: Add support for slow emulation platform X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=04bc5c939a79c796374ffb93251841317ef8cf6f;p=project%2Fbcm63xx%2Fu-boot.git serial: zynq: Add support for slow emulation platform 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 --- diff --git a/drivers/serial/serial_zynq.c b/drivers/serial/serial_zynq.c index 3e2b8dc183..9278763164 100644 --- a/drivers/serial/serial_zynq.c +++ b/drivers/serial/serial_zynq.c @@ -48,10 +48,16 @@ static void uart_zynq_serial_setbrg(const int port) /* Calculation results. */ unsigned int calc_bauderror, bdiv, bgen; unsigned long calc_baud = 0; - unsigned long baud = gd->baudrate; + unsigned long baud; unsigned long clock = get_uart_clk(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 * Baud rate = ------------------ * bgen * (bdiv + 1)