[rtems commit] dev/sc16is752: Set TLS to zero
Sebastian Huber
sebh at rtems.org
Mon Aug 26 11:29:40 UTC 2019
Module: rtems
Branch: master
Commit: aa7b76e98b9e73d9b5061a9d00a9a8b23a4480ce
Changeset: http://git.rtems.org/rtems/commit/?id=aa7b76e98b9e73d9b5061a9d00a9a8b23a4480ce
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Fri Aug 9 07:59:13 2019 +0200
dev/sc16is752: Set TLS to zero
Ensures that the FCR values are used.
---
cpukit/dev/serial/sc16is752.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/cpukit/dev/serial/sc16is752.c b/cpukit/dev/serial/sc16is752.c
index a4dfeb7..d1065a3 100644
--- a/cpukit/dev/serial/sc16is752.c
+++ b/cpukit/dev/serial/sc16is752.c
@@ -113,6 +113,18 @@ static void set_efr(sc16is752_context *ctx, uint8_t efr)
write_reg(ctx, SC16IS752_LCR, &ctx->lcr, 1);
}
+static void set_tlr(sc16is752_context *ctx, uint8_t tlr)
+{
+ uint8_t mcr;
+
+ read_reg(ctx, SC16IS752_MCR, &mcr, 1);
+ mcr |= SC16IS752_MCR_TCR_TLR;
+ write_reg(ctx, SC16IS752_MCR, &mcr, 1);
+ write_reg(ctx, SC16IS752_TLR, &tlr, 1);
+ mcr &= ~SC16IS752_MCR_TCR_TLR;
+ write_reg(ctx, SC16IS752_MCR, &mcr, 1);
+}
+
static bool set_baud(sc16is752_context *ctx, rtems_termios_baud_t baud)
{
uint32_t freq = ctx->input_frequency;
@@ -257,6 +269,8 @@ static bool sc16is752_first_open(
| SC16IS752_FCR_TX_FIFO_TRG_32;
write_reg(ctx, SC16IS752_FCR, &fcr, 1);
+ set_tlr(ctx, 0);
+
ctx->ier = SC16IS752_IER_RHR;
write_reg(ctx, SC16IS752_IER, &ctx->ier, 1);
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