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tty: serial: uartlite: Add support for suspend and resume 

Add suspend and resume handlers for uartlite

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Shubhrajyoti Datta 2018-07-21 17:19:06 +05:30 committed by Greg Kroah-Hartman
parent 14288befeb
commit a3a10614ca
1 changed files with 36 additions and 0 deletions
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36
drivers/tty/serial/uartlite.c
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@ -690,9 +690,44 @@ static int ulite_release(struct device *dev)
return rc;
}
/**
* ulite_suspend - Stop the device.
*
* @dev: handle to the device structure.
* Return: 0 always.
*/
static int __maybe_unused ulite_suspend(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
if (port)
uart_suspend_port(&ulite_uart_driver, port);
return 0;
}
/**
* ulite_resume - Resume the device.
*
* @dev: handle to the device structure.
* Return: 0 on success, errno otherwise.
*/
static int __maybe_unused ulite_resume(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
if (port)
uart_resume_port(&ulite_uart_driver, port);
return 0;
}
/* ---------------------------------------------------------------------
* Platform bus binding
*/
static SIMPLE_DEV_PM_OPS(ulite_pm_ops, ulite_suspend, ulite_resume);
#if defined(CONFIG_OF)
/* Match table for of_platform binding */
static const struct of_device_id ulite_of_match[] = {
@ -768,6 +803,7 @@ static struct platform_driver ulite_platform_driver = {
.driver = {
.name = "uartlite",
.of_match_table = of_match_ptr(ulite_of_match),
.pm = &ulite_pm_ops,
},
};