On Tue, Jun 30, 2020 at 04:42:11PM -0700, Daniel Winkler wrote:
> This reverts commit 0eeaf62981ecc79e8395ca8caa1570eaf3a12257.
That is not an upstream commit. You probably mean:
commit 7b668c064ec33f3d687c3a413d05e355172e6c92
Author: Serge Semin <sergey.se...@baikalelectronics.ru>
Date: Thu May 7 02:31:32 2020 +0300
serial: 8250: Fix max baud limit in generic 8250 port
And you didn't cc the commit author (hereby fixed).
Thanks,
Lukas
>
> The change regresses the QCA6174A-3 bluetooth chip, preventing
> firmware from being properly loaded. We have verified that without
> this patch, the chip works as intended.
>
> Signed-off-by: Daniel Winkler <danielwink...@google.com>
> ---
>
> drivers/tty/serial/8250/8250_port.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/tty/serial/8250/8250_port.c
> b/drivers/tty/serial/8250/8250_port.c
> index 1632f7d25acca..e057c65ac1580 100644
> --- a/drivers/tty/serial/8250/8250_port.c
> +++ b/drivers/tty/serial/8250/8250_port.c
> @@ -2618,8 +2618,6 @@ static unsigned int serial8250_get_baud_rate(struct
> uart_port *port,
> struct ktermios *termios,
> struct ktermios *old)
> {
> - unsigned int tolerance = port->uartclk / 100;
> -
> /*
> * Ask the core to calculate the divisor for us.
> * Allow 1% tolerance at the upper limit so uart clks marginally
> @@ -2628,7 +2626,7 @@ static unsigned int serial8250_get_baud_rate(struct
> uart_port *port,
> */
> return uart_get_baud_rate(port, termios, old,
> port->uartclk / 16 / UART_DIV_MAX,
> - (port->uartclk + tolerance) / 16);
> + port->uartclk);
> }
>
> void
> --
> 2.27.0.212.ge8ba1cc988-goog
