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authorLinus Torvalds <torvalds@linux-foundation.org>2008-07-14 13:37:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-14 13:37:29 -0700
commit6c118e43dc513a7118b49b9ff953fe61e14515dc (patch)
treeef654ba1982c17a516697d25b3d0405acb6aeac1 /drivers/serial
parent847106ff628805e1a0aa91e7f53381f3fdfcd839 (diff)
parent72f6befeea7dc634a83219287d5b874734b85637 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6: (31 commits) avr32: Fix typo of IFSR in a comment in the PIO header file avr32: Power Management support ("standby" and "mem" modes) avr32: Add system device for the internal interrupt controller (intc) avr32: Add simple SRAM allocator avr32: Enable SDRAMC clock at startup rtc-at32ap700x: Enable wakeup macb: Basic suspend/resume support atmel_serial: Drain console TX shifter before suspending atmel_serial: Fix build on avr32 with CONFIG_PM enabled avr32: Use a quicklist for PTE allocation as well avr32: Use a quicklist for PGD allocation avr32: Cover the kernel page tables in the user PGDs avr32: Store virtual addresses in the PGD avr32: Remove useless zeroing of swapper_pg_dir at startup avr32: Clean up and optimize the TLB operations avr32: Rename at32ap.c -> pdc.c avr32: Move setup_platform() into chip-specific file avr32: Kill special exception handler sections avr32: Kill unneeded #include <asm/pgalloc.h> from asm/mmu_context.h avr32: Clean up time.c #includes ...
Diffstat (limited to 'drivers/serial')
-rw-r--r--drivers/serial/atmel_serial.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c
index 42be8b01a40..6aeef22bd20 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);