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Commit 3941cf9b authored by Pali Rohár's avatar Pali Rohár Committed by Greg Kroah-Hartman
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serial: mvebu-uart: fix calculation of clock divisor 



commit 9078204ca5c33ba20443a8623a41a68a9995a70d upstream.

The clock divisor should be rounded to the closest value.

Signed-off-by: default avatarPali Rohár <pali@kernel.org>
Fixes: 68a0db1d ("serial: mvebu-uart: add function to change baudrate")
Cc: stable@vger.kernel.org # 0e4cf69ede87 ("serial: mvebu-uart: clarify the baud rate derivation")
Link: https://lore.kernel.org/r/20210624224909.6350-2-pali@kernel.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 424f497d

drivers/tty/serial/mvebu-uart.c

+1 −1
Original line number Diff line number Diff line
@@ -462,7 +462,7 @@ 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;