serial: mvebu-uart: fix calculation of clock divisor

commit 9078204 upstream. The clock divisor should be rounded to the closest value. Signed-off-by: Pali Rohár <[email protected]> Fixes: 68a0db1 ("serial: mvebu-uart: add function to change baudrate") Cc: [email protected] # 0e4cf69 ("serial: mvebu-uart: clarify the baud rate derivation") Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
ArmSoM · Jul 14, 2021 · 17451bd · 17451bd
1 parent 8c90ec9
commit 17451bd
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c
@@ -463,7 +463,7 @@ static int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud)
 	 * makes use of D to configure the desired baudrate.
 	 */
 	m_divisor = OSAMP_DEFAULT_DIVISOR;
-	d_divisor = DIV_ROUND_UP(port->uartclk, baud * m_divisor);
+	d_divisor = DIV_ROUND_CLOSEST(port->uartclk, baud * m_divisor);
 
 	brdv = readl(port->membase + UART_BRDV);
 	brdv &= ~BRDV_BAUD_MASK;