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imxrt:Serial Preserve all but W1C bit in SR

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SR contains configuration bits that need to be preserved.
This commit is contained in:
David Sidrane
2022-12-16 05:00:47 -08:00
committed by Petro Karashchenko
parent 2d0df3b5f2
commit 60840f1ed2
1 changed files with 26 additions and 11 deletions
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arch/arm/src/imxrt/imxrt_serial.c
+26 -11
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@@ -1746,6 +1746,7 @@ static int imxrt_interrupt(int irq, void *context, void *arg)
{
struct imxrt_uart_s *priv = (struct imxrt_uart_s *)arg;
uint32_t usr;
uint32_t lsr;
int passes = 0;
bool handled;
@@ -1771,30 +1772,45 @@ static int imxrt_interrupt(int irq, void *context, void *arg)
*/
usr = imxrt_serialin(priv, IMXRT_LPUART_STAT_OFFSET);
/* Removed all W1C from the last sr */
lsr = usr & ~(LPUART_STAT_LBKDIF | LPUART_STAT_RXEDGIF |
LPUART_STAT_IDLE | LPUART_STAT_OR |
LPUART_STAT_NF | LPUART_STAT_FE |
LPUART_STAT_PF | LPUART_STAT_MA1F |
LPUART_STAT_MA2F);
/* Keep what we will service */
usr &= (LPUART_STAT_RDRF | LPUART_STAT_TDRE | LPUART_STAT_OR |
LPUART_STAT_FE | LPUART_STAT_NF | LPUART_STAT_PF |
LPUART_STAT_FE | LPUART_STAT_NF | LPUART_STAT_PF |
LPUART_STAT_IDLE);
/* Clear serial overrun, parity and framing errors */
if ((usr & LPUART_STAT_OR) != 0)
{
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET, LPUART_STAT_OR);
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET,
lsr | LPUART_STAT_OR);
}
if ((usr & LPUART_STAT_NF) != 0)
{
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET, LPUART_STAT_NF);
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET,
lsr | LPUART_STAT_NF);
}
if ((usr & LPUART_STAT_PF) != 0)
{
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET, LPUART_STAT_PF);
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET,
lsr | LPUART_STAT_PF);
}
if ((usr & LPUART_STAT_FE) != 0)
{
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET, LPUART_STAT_FE);
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET,
lsr | LPUART_STAT_FE);
}
if ((usr & (LPUART_STAT_FE | LPUART_STAT_PF | LPUART_STAT_NF)) != 0)
@@ -1809,7 +1825,8 @@ static int imxrt_interrupt(int irq, void *context, void *arg)
if ((usr & LPUART_STAT_IDLE) != 0)
{
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET, LPUART_STAT_IDLE);
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET,
lsr | LPUART_STAT_IDLE);
imxrt_dma_rxcallback(priv->rxdma, priv, false, LPUART_STAT_IDLE);
}
#endif
@@ -2723,12 +2740,10 @@ static void imxrt_dma_rxcallback(DMACH_HANDLE handle, void *arg, bool done,
sr = imxrt_serialin(priv, IMXRT_LPUART_STAT_OFFSET);
if ((sr & (LPUART_STAT_OR | LPUART_STAT_NF | LPUART_STAT_FE)) != 0)
if ((sr & (LPUART_STAT_OR | LPUART_STAT_NF | LPUART_STAT_FE |
LPUART_STAT_PF)) != 0)
{
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET,
sr & (LPUART_STAT_OR |
LPUART_STAT_NF |
LPUART_STAT_FE));
imxrt_serialout(priv, IMXRT_LPUART_STAT_OFFSET, sr);
}
}
#endif