Since imx_disable_rx_int is only called by imx_startup,
let's integrate it into that function. Notice UCR2_ATEN
is never set in the driver, but I keep the clear so
that I am only moving thing. Hopefully, the ageing timer
will soon be used.
Signed-off-by: Troy Kisky <troy.kisky@xxxxxxxxxxxxxxxxxxx>
---
v2: new patch
v3: rebased on tty-next
v4: Added UCR2_ATEN statement to commit message
as suggested by Uwe
---
drivers/tty/serial/imx.c | 36 +++++++++---------------------------
1 file changed, 9 insertions(+), 27 deletions(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index a67a606c38eb..43dfd82e4e28 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -703,25 +703,6 @@ static irqreturn_t imx_rxint(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static void imx_disable_rx_int(struct imx_port *sport)
-{
- unsigned long temp;
-
- /* disable the receiver ready and aging timer interrupts */
- temp = readl(sport->port.membase + UCR1);
- temp &= ~(UCR1_RRDYEN);
- writel(temp, sport->port.membase + UCR1);
-
- temp = readl(sport->port.membase + UCR2);
- temp &= ~(UCR2_ATEN);
- writel(temp, sport->port.membase + UCR2);
-
- /* disable the rx errors interrupts */
- temp = readl(sport->port.membase + UCR4);
- temp &= ~UCR4_OREN;
- writel(temp, sport->port.membase + UCR4);
-}
-
static void clear_rx_errors(struct imx_port *sport);
/*
@@ -1252,18 +1233,21 @@ static int imx_startup(struct uart_port *port)
if (sport->dma_is_inited && !sport->dma_is_enabled)
imx_enable_dma(sport);
- temp = readl(sport->port.membase + UCR1);
- temp |= UCR1_RRDYEN | UCR1_UARTEN;
+ temp = readl(sport->port.membase + UCR1) & ~UCR1_RRDYEN;
+ if (!sport->dma_is_enabled)
+ temp |= UCR1_RRDYEN;
+ temp |= UCR1_UARTEN;
if (sport->have_rtscts)
temp |= UCR1_RTSDEN;
writel(temp, sport->port.membase + UCR1);
- temp = readl(sport->port.membase + UCR4);
- temp |= UCR4_OREN;
+ temp = readl(sport->port.membase + UCR4) & ~UCR4_OREN;
+ if (!sport->dma_is_enabled)
+ temp |= UCR4_OREN;
writel(temp, sport->port.membase + UCR4);
- temp = readl(sport->port.membase + UCR2);
+ temp = readl(sport->port.membase + UCR2) & ~UCR2_ATEN;
temp |= (UCR2_RXEN | UCR2_TXEN);
if (!sport->have_rtscts)
temp |= UCR2_IRTS;
@@ -1297,10 +1281,8 @@ static int imx_startup(struct uart_port *port)
* In our iMX53 the average delay for the first reception dropped from
* approximately 35000 microseconds to 1000 microseconds.
*/
- if (sport->dma_is_enabled) {
- imx_disable_rx_int(sport);
+ if (sport->dma_is_enabled)
start_rx_dma(sport);
- }
spin_unlock_irqrestore(&sport->port.lock, flags);
--
2.11.0
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