diff options
| author | Anson Huang <b20788@freescale.com> | 2011-07-20 14:46:37 +0800 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2012-01-09 20:21:32 +0800 |
| commit | 23625884239af1ef5d4933eb63a88b2cdd5a9ebd (patch) | |
| tree | 4e99ea78d8c96378798415de4410ee49fb8e0ce0 /drivers/tty/serial/imx.c | |
| parent | 5f4317a276feec2f46a4112ae2bacdf04f640416 (diff) | |
ENGR00139274-4 [UART]Enable suspend/resume feature
1. Enable wake up of uart;
Signed-off-by: Anson Huang <b20788@freescale.com>
Diffstat (limited to 'drivers/tty/serial/imx.c')
| -rw-r--r-- | drivers/tty/serial/imx.c | 42 |
1 files changed, 30 insertions, 12 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 850b6d811418..fd517262a8d0 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -501,8 +501,7 @@ static irqreturn_t imx_int(int irq, void *dev_id) if (sts & USR1_RTSD) imx_rtsint(irq, dev_id); - -#ifdef CONFIG_ARCH_MX6 +#ifdef CONFIG_PM if (sts & USR1_AWAKE) writel(USR1_AWAKE, sport->port.membase + USR1); #endif @@ -602,6 +601,7 @@ static int imx_startup(struct uart_port *port) struct imx_port *sport = (struct imx_port *)port; int retval; unsigned long flags, temp; + struct tty_struct *tty; imx_setup_ufcr(sport, 0); @@ -732,6 +732,10 @@ static int imx_startup(struct uart_port *port) pdata->irda_enable(1); } + tty = sport->port.state->port.tty; +#ifdef CONFIG_PM + device_set_wakeup_enable(tty->dev, 1); +#endif return 0; error_out3: @@ -1212,14 +1216,20 @@ 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 + } if (sport) uart_suspend_port(&imx_reg, &sport->port); -#ifdef CONFIG_ARCH_MX6 - /* enable awake for MX6*/ - val = readl(sport->port.membase + UCR3); - val |= UCR3_AWAKEN; - writel(val, sport->port.membase + UCR3); -#endif + return 0; } @@ -1231,11 +1241,16 @@ static int serial_imx_resume(struct platform_device *dev) if (sport) uart_resume_port(&imx_reg, &sport->port); -#ifdef CONFIG_ARCH_MX6 - val = readl(sport->port.membase + UCR3); - val &= ~UCR3_AWAKEN; - writel(val, sport->port.membase + UCR3); + 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); + } return 0; } @@ -1311,6 +1326,9 @@ 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) |