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dev/sc16is752: Set TLS to zero

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Ensures that the FCR values are used.
This commit is contained in:
Sebastian Huber
2019-08-09 07:59:13 +02:00
parent 2a2a0fdd95
commit aa7b76e98b
1 changed files with 14 additions and 0 deletions
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14
cpukit/dev/serial/sc16is752.c
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@@ -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);