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

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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>
This commit is contained in:
Kendall Willis
2026-01-16 13:55:49 -06:00
committed by Greg Kroah-Hartman
parent 0e19f73ffd
commit b64da5b16a
1 changed files with 2 additions and 0 deletions
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2
drivers/tty/serial/8250/8250_omap.c
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@@ -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);
}