diff options
| author | Fabio Estevam <fabio.estevam@freescale.com> | 2011-12-19 19:11:45 -0200 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2012-01-09 21:11:48 +0800 |
| commit | 5e998df35337d53819038c021fd7528ed1a52557 (patch) | |
| tree | afd13abb5d5e613812fa02bbca826467b2e15b70 | |
| parent | b04e2ec4b2884adf9374a8a2f8bb6d75c5cd4432 (diff) | |
ENGR00162644 tty: serial: imx: Allow UART to be a source for wakeup
Allow UART to be a source from wakeup from low power mode.
Tested on a mx6sabrelite (where ttymxc1 is the console) by doing:
echo enabled > /sys/devices/platform/imx-uart.1/tty/ttymxc1/power/wakeup
echo mem > /sys/power/state
and then pressing a key in the console will wakeup the system.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
| -rw-r--r-- | drivers/tty/serial/imx.c | 42 |
1 files changed, 13 insertions, 29 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 57988a52f9be..7564939cc2e7 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -635,10 +635,10 @@ static irqreturn_t imx_int(int irq, void *dev_id) if (sts & USR1_RTSD) imx_rtsint(irq, dev_id); -#ifdef CONFIG_PM + if (sts & USR1_AWAKE) writel(USR1_AWAKE, sport->port.membase + USR1); -#endif + return IRQ_HANDLED; } @@ -1072,9 +1072,7 @@ static int imx_startup(struct uart_port *port) } tty = sport->port.state->port.tty; -#ifdef CONFIG_PM - device_set_wakeup_enable(tty->dev, 1); -#endif + return 0; error_out3: @@ -1571,17 +1569,11 @@ static int serial_imx_suspend(struct platform_device *dev, pm_message_t state) struct imx_port *sport = platform_get_drvdata(dev); unsigned int val; - if (device_may_wakeup(&dev->dev)) { - enable_irq_wake(sport->rxirq); -#ifdef CONFIG_PM - if (sport->port.line == 0) { - /* enable awake for MX6 */ - val = readl(sport->port.membase + UCR3); - val |= UCR3_AWAKEN; - writel(val, sport->port.membase + UCR3); - } -#endif - } + /* Enable i.MX UART wakeup */ + val = readl(sport->port.membase + UCR3); + val |= UCR3_AWAKEN; + writel(val, sport->port.membase + UCR3); + if (sport) uart_suspend_port(&imx_reg, &sport->port); @@ -1596,16 +1588,11 @@ static int serial_imx_resume(struct platform_device *dev) if (sport) uart_resume_port(&imx_reg, &sport->port); - if (device_may_wakeup(&dev->dev)) { -#ifdef CONFIG_PM - if (sport->port.line == 0) { - val = readl(sport->port.membase + UCR3); - val &= ~UCR3_AWAKEN; - writel(val, sport->port.membase + UCR3); - } -#endif - disable_irq_wake(sport->rxirq); - } + /* Disable i.MX UART wakeup */ + val = readl(sport->port.membase + UCR3); + val &= ~UCR3_AWAKEN; + writel(val, sport->port.membase + UCR3); + return 0; } @@ -1685,9 +1672,6 @@ static int serial_imx_probe(struct platform_device *pdev) goto deinit; platform_set_drvdata(pdev, &sport->port); -#ifdef CONFIG_PM - device_init_wakeup(&pdev->dev, 1); -#endif return 0; deinit: if (pdata && pdata->exit) |