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Commit d6b0d2f2 authored by Stefan Agner's avatar Stefan Agner Committed by Greg Kroah-Hartman
Browse files

tty: serial: fsl_lpuart: support suspend/resume 



Add suspend/resume support.

Signed-off-by: default avatarStefan Agner <stefan@agner.ch>
Signed-off-by: default avatarBhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b70b6361

drivers/tty/serial/fsl_lpuart.c

+14 −2
Original line number Diff line number Diff line
@@ -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;
@@ -1931,7 +1935,12 @@ 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;

}
@@ -1941,6 +1950,9 @@ 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);