From: Stefan Agner <stefan@xxxxxxxx>
Add suspend/resume support.
Signed-off-by: Stefan Agner <stefan@xxxxxxxx>
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@xxxxxxxxxxx>
---
drivers/tty/serial/fsl_lpuart.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index fabfa7e..75a2098 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -483,9 +483,8 @@ static void lpuart_dma_rx_complete(void *arg)
spin_unlock_irqrestore(&sport->port.lock, flags);
}
-static void lpuart_timer_func(unsigned long data)
+static void lpuart_dma_rx_terminate(struct lpuart_port *sport)
{
- struct lpuart_port *sport = (struct lpuart_port *)data;
struct tty_port *port = &sport->port.state->port;
struct dma_tx_state state;
unsigned long flags;
@@ -510,6 +509,11 @@ static void lpuart_timer_func(unsigned long data)
spin_unlock_irqrestore(&sport->port.lock, flags);
}
+static void lpuart_timer_func(unsigned long data)
+{
+ lpuart_dma_rx_terminate((struct lpuart_port *)data);
+}
+
static inline void lpuart_prepare_rx(struct lpuart_port *sport)
{
unsigned long flags;
@@ -1925,7 +1929,12 @@ static int lpuart_suspend(struct device *dev)
writeb(temp, sport->port.membase + UARTCR2);
}
+ if (sport->dma_rx_in_progress)
+ lpuart_dma_rx_terminate(sport);
+
uart_suspend_port(&lpuart_reg, &sport->port);
+ if (sport->port.suspended && !sport->port.irq_wake)
+ clk_disable_unprepare(sport->clk);
return 0;
}
@@ -1935,6 +1944,9 @@ static int lpuart_resume(struct device *dev)
struct lpuart_port *sport = dev_get_drvdata(dev);
unsigned long temp;
+ if (sport->port.suspended && !sport->port.irq_wake)
+ clk_prepare_enable(sport->clk);
+
if (sport->lpuart32) {
lpuart32_setup_watermark(sport);
temp = lpuart32_read(sport->port.membase + UARTCTRL);
--
2.9.0
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