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| author | Sherry Sun <sherry.sun@nxp.com> | 2025-09-24 10:56:07 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-22 12:04:51 +0200 |
| commit | 18bdfccf3c30b208b65b890f75ecc76fcb79e224 (patch) | |
| tree | df23bb3945becafdc2fa42570916e8146927d81c | |
| parent | 08a0dd5a465814233cf39a87bf746dc44d0ab571 (diff) | |
| download | tip-18bdfccf3c30b208b65b890f75ecc76fcb79e224.tar.gz | |
tty: serial: fsl_lpuart: Add missing wakeup event reporting
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>
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index c9519e649e8268..1bd7ec9c81ea4b 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -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); } } |