Hi Chris,
On Wed, Jul 25, 2018 at 4:39 PM Chris Brandt <[email protected]> wrote:
> Some SCIF versions mux error and break interrupts together and then provide
> a separate interrupt ID for just TEI/DRI.
>
> Allow all 6 types of interrupts to be specified via platform data (or DT)
> and for any signals that are muxed together (have the same interrupt
> number) simply register one handler.
>
> Signed-off-by: Chris Brandt <[email protected]>
> ---
> v2:
> * Move compressed SCIF reg address space to a separate commit
> * Handle all 6 possible interrupt types
Thanks for your patch!
> --- a/drivers/tty/serial/sh-sci.c
> +++ b/drivers/tty/serial/sh-sci.c
> @@ -1683,11 +1685,26 @@ static irqreturn_t sci_tx_interrupt(int irq, void
> *ptr)
> return IRQ_HANDLED;
> }
>
> +static irqreturn_t sci_br_interrupt(int irq, void *ptr);
You can avoid the forward declaration by moving the whole function here.
> +
> static irqreturn_t sci_er_interrupt(int irq, void *ptr)
> {
> struct uart_port *port = ptr;
> struct sci_port *s = to_sci_port(port);
>
> + if (s->irqs[SCIx_ERI_IRQ] == s->irqs[SCIx_BRI_IRQ]) {
> + /* Break and Error interrupts are muxed */
> + unsigned short ssr_status = serial_port_in(port, SCxSR);
> +
> + /* Break Interrupt */
> + if (ssr_status & SCxSR_BRK(port))
> + sci_br_interrupt(irq, ptr);
> +
> + /* Break only? */
> + if (!(ssr_status & SCxSR_ERRORS(port)))
> + return IRQ_HANDLED;
> + }
> +
> /* Handle errors */
> if (port->type == PORT_SCI) {
> if (sci_handle_errors(port)) {
> @@ -2809,6 +2845,8 @@ static int sci_init_single(struct platform_device *dev,
> sci_port->irqs[1] = sci_port->irqs[0];
> sci_port->irqs[2] = sci_port->irqs[0];
> sci_port->irqs[3] = sci_port->irqs[0];
> + sci_port->irqs[4] = sci_port->irqs[0];
> + sci_port->irqs[5] = sci_port->irqs[0];
You may want to start using a loop from 1 to ARRAY_SIZE(sci_port->irqs) - 1
instead.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
