From: Martin Blumenstingl Date: Sun, 15 Jan 2017 22:32:52 +0000 (+0100) Subject: tty: serial: meson: allow baud-rates higher than 115200 X-Git-Tag: v4.14-rc1~1454^2~60 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8c9faa556a37e62799fd22d7409386b1b8ddd4e7;p=platform%2Fkernel%2Flinux-rpi.git tty: serial: meson: allow baud-rates higher than 115200 The vendor driver allows setting baud-rates higher than 115200 baud. There is a check in the vendor driver which prevents using more than 115200 baud during startup, however it does not have such a check in .set_termios. Higher baud-rates are often used by the bluetooth modules embedded into the SDIO wifi chips (Amlogic devices use brcmfmac based wifi chips quite often, 2000000 baud seems to be a common value for the UART baud-rate in Amlogic's "libbt"). I have tested this on a Meson GXL device with uart_A (to which the bluetooth module is connected, where initialization times out with 115200 baud) and uart_AO (which I manually set to 2000000 baud and then connected with my USB UART adapter to that). Signed-off-by: Martin Blumenstingl Acked-by: Kevin Hilman Tested-by: Andreas Färber Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c index 6aea0f4..60f1679 100644 --- a/drivers/tty/serial/meson_uart.c +++ b/drivers/tty/serial/meson_uart.c @@ -364,7 +364,7 @@ static void meson_uart_set_termios(struct uart_port *port, writel(val, port->membase + AML_UART_CONTROL); - baud = uart_get_baud_rate(port, termios, old, 9600, 115200); + baud = uart_get_baud_rate(port, termios, old, 9600, 4000000); meson_uart_change_speed(port, baud); port->read_status_mask = AML_UART_TX_FIFO_WERR;