Commit 7547d9ab authored by Erwan Le Ray's avatar Erwan Le Ray Committed by Greg Kroah-Hartman
Browse files

serial: stm32: enable / disable wake irqs for mcrtl_gpio wakeup sources 



Enable mctrl_gpio wake_irq if device_may_wakeup when usart is suspended,
and disable mctrl_gpios wake_irq if device_may_wakeup when usart is
resumed.

Signed-off-by: default avatarErwan Le Ray <erwan.leray@foss.st.com>
Link: https://lore.kernel.org/r/20220203171644.12231-3-erwan.leray@foss.st.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9978c2f1

drivers/tty/serial/stm32-usart.c

+2 −1
Original line number Diff line number Diff line
@@ -1756,6 +1756,7 @@ static int __maybe_unused stm32_usart_serial_en_wakeup(struct uart_port *port, 
	if (enable) {

		stm32_usart_set_bits(port, ofs->cr1, USART_CR1_UESM);

		stm32_usart_set_bits(port, ofs->cr3, USART_CR3_WUFIE);

		mctrl_gpio_enable_irq_wake(stm32_port->gpios);



		/*

		 * When DMA is used for reception, it must be disabled before
@@ -1782,7 +1783,7 @@ static int __maybe_unused stm32_usart_serial_en_wakeup(struct uart_port *port, 
			if (ret)

				return ret;

		}



		mctrl_gpio_disable_irq_wake(stm32_port->gpios);

		stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_UESM);

		stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_WUFIE);

	}