diff options
Diffstat (limited to 'drivers/tty/serial/of_serial.c')
| -rw-r--r-- | drivers/tty/serial/of_serial.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c index 68d4455f3cf9..56982da4a9e9 100644 --- a/drivers/tty/serial/of_serial.c +++ b/drivers/tty/serial/of_serial.c @@ -158,7 +158,7 @@ static int of_platform_serial_probe(struct platform_device *ofdev) if (of_find_property(ofdev->dev.of_node, "used-by-rtas", NULL)) return -EBUSY; - info = kmalloc(sizeof(*info), GFP_KERNEL); + info = kzalloc(sizeof(*info), GFP_KERNEL); if (info == NULL) return -ENOMEM; @@ -183,10 +183,6 @@ static int of_platform_serial_probe(struct platform_device *ofdev) "auto-flow-control")) port8250.capabilities |= UART_CAP_AFE; - if (of_property_read_bool(ofdev->dev.of_node, - "has-hw-flow-control")) - port8250.port.flags |= UPF_HARD_FLOW; - ret = serial8250_register_8250_port(&port8250); break; } @@ -244,6 +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. */ @@ -275,6 +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, |