Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3d16ddc1 authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Greg Kroah-Hartman
Browse files

serial: 8250_uniphier: add suspend/resume support 



Add suspend/resume support for UniPhier serial driver.

Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d3a91847

drivers/tty/serial/8250/8250_uniphier.c

+35 −0
Original line number Diff line number Diff line
@@ -281,6 +281,40 @@ static int uniphier_uart_remove(struct platform_device *pdev) 
	return 0;

}



static int __maybe_unused uniphier_uart_suspend(struct device *dev)

{

	struct uniphier8250_priv *priv = dev_get_drvdata(dev);

	struct uart_8250_port *up = serial8250_get_port(priv->line);



	serial8250_suspend_port(priv->line);



	if (!uart_console(&up->port) || console_suspend_enabled)

		clk_disable_unprepare(priv->clk);



	return 0;

}



static int __maybe_unused uniphier_uart_resume(struct device *dev)

{

	struct uniphier8250_priv *priv = dev_get_drvdata(dev);

	struct uart_8250_port *up = serial8250_get_port(priv->line);

	int ret;



	if (!uart_console(&up->port) || console_suspend_enabled) {

		ret = clk_prepare_enable(priv->clk);

		if (ret)

			return ret;

	}



	serial8250_resume_port(priv->line);



	return 0;

}



static const struct dev_pm_ops uniphier_uart_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(uniphier_uart_suspend, uniphier_uart_resume)

};



static const struct of_device_id uniphier_uart_match[] = {

	{ .compatible = "socionext,uniphier-uart" },

	{ /* sentinel */ }
@@ -293,6 +327,7 @@ static struct platform_driver uniphier_uart_platform_driver = { 
	.driver = {

		.name	= "uniphier-uart",

		.of_match_table = uniphier_uart_match,

		.pm = &uniphier_uart_pm_ops,

	},

};

module_platform_driver(uniphier_uart_platform_driver);