diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/atmel_serial.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c index 42be8b01a40f..6aeef22bd203 100644 --- a/drivers/serial/atmel_serial.c +++ b/drivers/serial/atmel_serial.c @@ -1439,14 +1439,29 @@ static struct uart_driver atmel_uart = { }; #ifdef CONFIG_PM +static bool atmel_serial_clk_will_stop(void) +{ +#ifdef CONFIG_ARCH_AT91 + return at91_suspend_entering_slow_clock(); +#else + return false; +#endif +} + static int atmel_serial_suspend(struct platform_device *pdev, pm_message_t state) { struct uart_port *port = platform_get_drvdata(pdev); struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + if (atmel_is_console_port(port) && console_suspend_enabled) { + /* Drain the TX shifter */ + while (!(UART_GET_CSR(port) & ATMEL_US_TXEMPTY)) + cpu_relax(); + } + if (device_may_wakeup(&pdev->dev) - && !at91_suspend_entering_slow_clock()) + && !atmel_serial_clk_will_stop()) enable_irq_wake(port->irq); else { uart_suspend_port(&atmel_uart, port); |