diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-08-08 22:48:43 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-28 20:51:22 +0200 |
| commit | 3d16ddc13c5e56726d05b4eceb766b06483e3686 (patch) | |
| tree | 7a818903386aa9124faa1f3afaac92b17bf2cd68 /drivers/tty | |
| parent | d3a9184773c5cde483e249096ae7c7f98f310e20 (diff) | |
serial: 8250_uniphier: add suspend/resume support
Add suspend/resume support for UniPhier serial driver.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250_uniphier.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_uniphier.c b/drivers/tty/serial/8250/8250_uniphier.c index 97a45b798fcd..8a10b10e27aa 100644 --- a/drivers/tty/serial/8250/8250_uniphier.c +++ b/drivers/tty/serial/8250/8250_uniphier.c @@ -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); |