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tty: serial: fsl_lpuart: Add missing wakeup event reporting

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Current lpuart wakeup event would not report itself as wakeup source
through sysfs. Add pm_wakeup_event() to support it.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20250924025607.2515833-1-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sherry Sun 2025-09-24 10:56:07 +08:00 committed by Greg Kroah-Hartman
parent 08a0dd5a46
commit 18bdfccf3c
1 changed files with 8 additions and 0 deletions
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8
drivers/tty/serial/fsl_lpuart.c
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@ -3087,6 +3087,8 @@ static int lpuart_suspend_noirq(struct device *dev)
static int lpuart_resume_noirq(struct device *dev)
{
struct lpuart_port *sport = dev_get_drvdata(dev);
struct tty_port *port = &sport->port.state->port;
bool wake_active;
u32 stat;
pinctrl_pm_select_default_state(dev);
@ -3098,6 +3100,12 @@ static int lpuart_resume_noirq(struct device *dev)
if (lpuart_is_32(sport)) {
stat = lpuart32_read(&sport->port, UARTSTAT);
lpuart32_write(&sport->port, stat, UARTSTAT);
/* check whether lpuart wakeup was triggered */
wake_active = stat & (UARTSTAT_RDRF | UARTSTAT_RXEDGIF);
if (wake_active && irqd_is_wakeup_set(irq_get_irq_data(sport->port.irq)))
pm_wakeup_event(tty_port_tty_get(port)->dev, 0);
}
}