diff options
| author | Jingchang Lu <jingchang.lu@freescale.com> | 2014-09-22 08:58:24 (GMT) |
|---|---|---|
| committer | Matthew Weigel <Matthew.Weigel@freescale.com> | 2014-12-11 18:36:30 (GMT) |
| commit | 915cad947438c87d5f4245880778a07cb14d2fbd (patch) | |
| tree | 7a2c8483b6d9d6156cfae67a94218e67041a3073 /drivers/tty | |
| parent | 6313b89ee179e04f83641703a07f47c202098f2a (diff) | |
| download | linux-fsl-qoriq-915cad947438c87d5f4245880778a07cb14d2fbd.tar.xz | |
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>
This patch has been sent to upstream for review:
https://patchwork.kernel.org/patch/4954521/
Change-Id: I06905237f7d7ef51bf5a1c135cd0880d92c4c104
Reviewed-on: http://git.am.freescale.net:8181/19728
Tested-by: Review Code-CDREVIEW <CDREVIEW@freescale.com>
Reviewed-by: Chenhui Zhao <chenhui.zhao@freescale.com>
Reviewed-by: Li Xiubo <Li.Xiubo@freescale.com>
Reviewed-by: Zhengxiong Jin <Jason.Jin@freescale.com>
Diffstat (limited to 'drivers/tty')
| -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 b4507be..a320fc5 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. */ @@ -273,6 +299,7 @@ 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, |