diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/drivers/uart/sifive.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/drivers/uart/sifive.c b/src/drivers/uart/sifive.c index d1b89dc745..815a0cfb05 100644 --- a/src/drivers/uart/sifive.c +++ b/src/drivers/uart/sifive.c @@ -47,9 +47,16 @@ static void sifive_uart_init(struct sifive_uart_registers *regs, int div) void uart_init(unsigned int idx) { - unsigned int div; - div = uart_baudrate_divisor(get_uart_baudrate(), - uart_platform_refclk(), uart_input_clock_divider()); + /* + * according to FU540/FU740 manual: + * f_baud = f_in / (div + 1) + * <=> + * div = (f_in / f_baud) - 1 + */ + unsigned int div = uart_baudrate_divisor(get_uart_baudrate(), uart_platform_refclk(), + uart_input_clock_divider()); + div -= 1; + sifive_uart_init(uart_platform_baseptr(idx), div); } |