On Mon, May 27, 2019 at 08:59:43PM -0700, jay.dolan@xxxxxxxxxxx wrote:
> From: Jay Dolan <jay.dolan@xxxxxxxxxxx>
>
> The Pericom chips can achieve additional baud rates by programming the
> sample clock register. The baud rates can be described as
> 921600 * 16 / (16 - scr) for scr values 5 to 15. The divisor is set to 1
> for these baud rates.
>
> Adds new quirk for Pericom chips other than the four port chips to use
> the
>
> Signed-off-by: Jay Dolan <jay.dolan@xxxxxxxxxxx>
> ---
> drivers/tty/serial/8250/8250_pci.c | 97 ++++++++++++++++++++++++------
> 1 file changed, 79 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
> index df41397de478..9a895ae449c5 100644
> --- a/drivers/tty/serial/8250/8250_pci.c
> +++ b/drivers/tty/serial/8250/8250_pci.c
> @@ -1326,13 +1326,66 @@ static int pci_default_setup(struct serial_private *priv,
>
> return setup_port(priv, port, bar, offset, board->reg_shift);
> }
> -
> +void
> +pericom_do_set_divisor(struct uart_port *port, unsigned int baud,
> + unsigned int quot, unsigned int quot_frac)
> +{
> + int scr;
> + int lcr;
> + int actual_baud;
> + int tolerance;
> +
> + for (scr = 5 ; scr <= 15 ; scr++) {
> + actual_baud = 921600 * 16 / scr;
> + tolerance = actual_baud / 50;
> +
> + if ((baud < actual_baud + tolerance) &&
> + (baud > actual_baud - tolerance)) {
> +
> + lcr = serial_port_in(port, UART_LCR);
> + serial_port_out(port, UART_LCR, lcr | 0x80);
> +
> + serial_port_out(port, UART_DLL, 1);
> + serial_port_out(port, UART_DLM, 0);
> + serial_port_out(port, UART_PCM_SCR, 16 - scr);
This line breaks the build :(
Are you sure you tested this patch?
greg k-h
