Add the missing timeout bit definition for (H)SCIF.
Clear the timeout and overrun flag bits during UART reset, cfr. the
initialization flowchart in the datasheet.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
drivers/tty/serial/sh-sci.c | 5 +++++
drivers/tty/serial/sh-sci.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 549d799cb18fafe7..fe9ad1b56420876a 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2056,6 +2056,11 @@ static void sci_reset(struct uart_port *port)
sci_clear_SCxSR(port,
SCxSR_RDxF_CLEAR(port) & SCxSR_ERROR_CLEAR(port) &
SCxSR_BREAK_CLEAR(port));
+ if (sci_getreg(port, SCLSR)->size) {
+ status = serial_port_in(port, SCLSR);
+ status &= ~(SCLSR_TO | SCLSR_ORER);
+ serial_port_out(port, SCLSR, status);
+ }
}
static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h
index 7a4fa185b93ef307..c590418d2a40d78b 100644
--- a/drivers/tty/serial/sh-sci.h
+++ b/drivers/tty/serial/sh-sci.h
@@ -105,6 +105,7 @@ enum {
#define SCFCR_LOOP BIT(0) /* Loopback Test */
/* SCLSR (Line Status Register) on (H)SCIF */
+#define SCLSR_TO BIT(2) /* Timeout */
#define SCLSR_ORER BIT(0) /* Overrun Error */
/* SCSPTR (Serial Port Register), optional */
--
1.9.1
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