serial: 8250: omap: set out-of-band wakeup if wakeup pinctrl exists

In TI K3 SoCs, I/O daisy chaining is used to allow wakeup from UART when the
UART controller is off. Set UART device as wakeup capable using out-of-band
wakeup if the 'wakeup' pinctrl state exists and the device may wakeup.

Reviewed-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Kendall Willis <k-willis@ti.com>
Link: https://patch.msgid.link/20260116-uart-wakeup-v2-1-0078ae9996e4@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index 272bc07c9a6b52354307d6d0997305413626e210..8c88e0f47cd9f7d03b75e6fbecb9233ac32eee21 100644 (file)
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -1382,6 +1382,8 @@ static int omap8250_select_wakeup_pinctrl(struct device *dev,
        if (!device_may_wakeup(dev))
                return 0;
 
+       device_set_out_band_wakeup(dev);
+
        return pinctrl_select_state(priv->pinctrl, priv->pinctrl_wakeup);
 }