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lib: utils/serial: Skip baudrate config if input frequency is zero

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We should skip baudrate config for UART8250 and SiFive UART when
input frequency is zero.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Anup Patel
2020-04-25 11:11:49 +05:30
committed by Anup Patel
parent 5bdf022d07
commit e6c1345f89
2 changed files with 10 additions and 5 deletions
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3
lib/utils/serial/sifive-uart.c
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@@ -89,7 +89,8 @@ int sifive_uart_init(unsigned long base, u32 in_freq, u32 baudrate)
uart_baudrate = baudrate;
/* Configure baudrate */
set_reg(UART_REG_DIV, uart_min_clk_divisor(in_freq, baudrate));
if (in_freq)
set_reg(UART_REG_DIV, uart_min_clk_divisor(in_freq, baudrate));
/* Disable interrupts */
set_reg(UART_REG_IE, 0);
/* Enable TX */