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Commit 22bdbaf6 authored by Karthikeyan Ramasubramanian's avatar Karthikeyan Ramasubramanian
Browse files

tty: serial: msm_geni_serial: Add UART Console Port PM state callback 



UART Console Port PM callback enables the console driver to turn on
and turn off the resources at appropriate time. This enables the
console driver to be in sync with the UART framework with respect to
the power states.

CRs-Fixed: 2112282
Change-Id: I8726be891926c5cef6280c007306c3f7cd79c2c2
Signed-off-by: default avatarKarthikeyan Ramasubramanian <kramasub@codeaurora.org>
parent c70d827b

drivers/tty/serial/msm_geni_serial.c

+17 −4
Original line number Diff line number Diff line
@@ -1428,9 +1428,7 @@ static void msm_geni_serial_shutdown(struct uart_port *uport) 
	msm_geni_serial_stop_rx(uport);

	spin_unlock_irqrestore(&uport->lock, flags);



	if (uart_console(uport)) {

		se_geni_resources_off(&msm_port->serial_rsc);

	} else {

	if (!uart_console(uport)) {

		msm_geni_serial_power_off(uport);

		if (msm_port->wakeup_irq > 0) {

			irq_set_irq_wake(msm_port->wakeup_irq, 0);
@@ -2080,6 +2078,21 @@ static void msm_geni_serial_debug_init(struct uart_port *uport) 
		dev_err(uport->dev, "Failed to create dbg dir\n");

}



static void msm_geni_serial_cons_pm(struct uart_port *uport,

		unsigned int new_state, unsigned int old_state)

{

	struct msm_geni_serial_port *msm_port = GET_DEV_PORT(uport);



	if (unlikely(!uart_console(uport)))

		return;



	if (new_state == UART_PM_STATE_ON && old_state == UART_PM_STATE_OFF)

		se_geni_resources_on(&msm_port->serial_rsc);

	else if (new_state == UART_PM_STATE_OFF &&

			old_state == UART_PM_STATE_ON)

		se_geni_resources_off(&msm_port->serial_rsc);

}



static const struct uart_ops msm_geni_console_pops = {

	.tx_empty = msm_geni_serial_tx_empty,

	.stop_tx = msm_geni_serial_stop_tx,
@@ -2096,6 +2109,7 @@ static const struct uart_ops msm_geni_console_pops = { 
	.poll_get_char	= msm_geni_serial_get_char,

	.poll_put_char	= msm_geni_serial_poll_put_char,

#endif

	.pm = msm_geni_serial_cons_pm,

};



static const struct uart_ops msm_geni_serial_pops = {
@@ -2420,7 +2434,6 @@ static int msm_geni_serial_sys_resume_noirq(struct device *dev) 


	if (uart_console(uport) &&

	    console_suspend_enabled && uport->suspended) {

		se_geni_resources_on(&port->serial_rsc);

		uart_resume_port((struct uart_driver *)uport->private_data,

									uport);

		disable_irq(uport->irq);