diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2019-01-07 17:23:18 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-08 16:56:52 +0100 |
| commit | 38766e4b612ba10844afadf2fce12f8f90465c64 (patch) | |
| tree | 8f73f0db813350e8baeaed349672f461c4cc3b54 /drivers/tty | |
| parent | 11b3770d54b28dcd905155a6d4aa551187ff00eb (diff) | |
serial: sh-sci: Extract sci_dma_rx_reenable_irq()
Extract the functionality to direct new serial port interrupts back to
the CPU into its own helper, to prepare for using it from a second
callsite.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 4c75468680cb..4d814c30c418 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1274,6 +1274,20 @@ static void start_hrtimer_us(struct hrtimer *hrt, unsigned long usec) hrtimer_start(hrt, t, HRTIMER_MODE_REL); } +static void sci_dma_rx_reenable_irq(struct sci_port *s) +{ + struct uart_port *port = &s->port; + u16 scr; + + /* Direct new serial port interrupts back to CPU */ + scr = serial_port_in(port, SCSCR); + if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) { + scr &= ~SCSCR_RDRQE; + enable_irq(s->irqs[SCIx_RXI_IRQ]); + } + serial_port_out(port, SCSCR, scr | SCSCR_RIE); +} + static void sci_dma_rx_complete(void *arg) { struct sci_port *s = arg; @@ -1453,7 +1467,6 @@ static enum hrtimer_restart rx_timer_fn(struct hrtimer *t) unsigned long flags; unsigned int read; int active, count; - u16 scr; dev_dbg(port->dev, "DMA Rx timed out\n"); @@ -1503,13 +1516,7 @@ static enum hrtimer_restart rx_timer_fn(struct hrtimer *t) if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) sci_submit_rx(s, true); - /* Direct new serial port interrupts back to CPU */ - scr = serial_port_in(port, SCSCR); - if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) { - scr &= ~SCSCR_RDRQE; - enable_irq(s->irqs[SCIx_RXI_IRQ]); - } - serial_port_out(port, SCSCR, scr | SCSCR_RIE); + sci_dma_rx_reenable_irq(s); spin_unlock_irqrestore(&port->lock, flags); |