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lib:platform: Fix sbi_getc return type.

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As per the current SBI specification, sbi_getc should return
an int instead of char.

In case of FIFO is empty, return -1 as per the specification.

Reported-by: Sergi Granell <xerpi.g.12@gmail.com>
Suggested-by:Thadeu Lima de Souza Cascardo <cascardo@cascardo.eti.br>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Atish Patra
2019-02-27 17:42:17 -08:00
committed by Anup Patel
parent 05602e2bf4
commit 86cc9b8633
11 changed files with 20 additions and 19 deletions
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4
platform/common/serial/sifive-uart.c
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@@ -69,12 +69,12 @@ void sifive_uart_putc(char ch)
set_reg(UART_REG_TXFIFO, ch);
}
char sifive_uart_getc(void)
int sifive_uart_getc(void)
{
u32 ret = get_reg(UART_REG_RXFIFO);
if (!(ret & UART_RXFIFO_EMPTY))
return ret & UART_RXFIFO_DATA;
return 0;
return -1;
}
int sifive_uart_init(unsigned long base,