diff options
| author |   Jingchang Lu <jingchang.lu@freescale.com> | 2014-09-23 16:34:12 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-28 21:49:13 -0400 |
| commit | 2dea53bf57783f243c892e99c10c6921e956aa7e (patch) | |
| tree | dd26ff912119ca5a3159d6c8467f9e5f87169a28 /drivers/tty/serial/of_serial.c | |
| parent | m68k: AMIGA_BUILTIN_SERIAL should depend on TTY (diff) | |
| download | linux-dev-2dea53bf57783f243c892e99c10c6921e956aa7e.tar.xz linux-dev-2dea53bf57783f243c892e99c10c6921e956aa7e.zip | |
serial: of-serial: add PM suspend/resume support
This adds PM suspend/resume support for the of-serial driver
to provide power management support on devices attatched to it.
Signed-off-by: Jingchang Lu <jingchang.lu@freescale.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/of_serial.c')
| -rw-r--r-- | drivers/tty/serial/of_serial.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c index 27981e2b9430..8bc2563335ae 100644 --- a/drivers/tty/serial/of_serial.c +++ b/drivers/tty/serial/of_serial.c @@ -240,6 +240,32 @@ static int of_platform_serial_remove(struct platform_device *ofdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int of_serial_suspend(struct device *dev) +{ + struct of_serial_info *info = dev_get_drvdata(dev); + + serial8250_suspend_port(info->line); + if (info->clk) + clk_disable_unprepare(info->clk); + + return 0; +} + +static int of_serial_resume(struct device *dev) +{ + struct of_serial_info *info = dev_get_drvdata(dev); + + if (info->clk) + clk_prepare_enable(info->clk); + + serial8250_resume_port(info->line); + + return 0; +} +#endif +static SIMPLE_DEV_PM_OPS(of_serial_pm_ops, of_serial_suspend, of_serial_resume); + /* * A few common types, add more as needed. */ @@ -271,6 +297,7 @@ static struct platform_driver of_platform_serial_driver = { .name = "of_serial", .owner = THIS_MODULE, .of_match_table = of_platform_serial_table, + .pm = &of_serial_pm_ops, }, .probe = of_platform_serial_probe, .remove = of_platform_serial_remove, |