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serial: stm32: rework wakeup management

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Rework wakeup management by activating uart as wakeup source when usart
device OR its tty virtual device parent is wakeup source.

This patch aim to avoid potential misalignment between serial and tty
wakeup flags.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Link: https://lore.kernel.org/r/20210319184253.5841-2-erwan.leray@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Erwan Le Ray 2021-03-19 19:42:49 +01:00 committed by Greg Kroah-Hartman
parent 0ae798fd96
commit 1631eeeaf0
1 changed files with 3 additions and 3 deletions
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6
drivers/tty/serial/stm32-usart.c
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@ -1534,7 +1534,7 @@ static int __maybe_unused stm32_usart_serial_suspend(struct device *dev)
uart_suspend_port(&stm32_usart_driver, port);
if (device_may_wakeup(dev))
if (device_may_wakeup(dev) || device_wakeup_path(dev))
stm32_usart_serial_en_wakeup(port, true);
else
stm32_usart_serial_en_wakeup(port, false);
@ -1546,7 +1546,7 @@ static int __maybe_unused stm32_usart_serial_suspend(struct device *dev)
* capabilities.
*/
if (console_suspend_enabled || !uart_console(port)) {
if (device_may_wakeup(dev))
if (device_may_wakeup(dev) || device_wakeup_path(dev))
pinctrl_pm_select_idle_state(dev);
else
pinctrl_pm_select_sleep_state(dev);
@ -1561,7 +1561,7 @@ static int __maybe_unused stm32_usart_serial_resume(struct device *dev)
pinctrl_pm_select_default_state(dev);
if (device_may_wakeup(dev))
if (device_may_wakeup(dev) || device_wakeup_path(dev))
stm32_usart_serial_en_wakeup(port, false);
return uart_resume_port(&stm32_usart_driver, port);