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Commit baf69320 authored by Patrick Daly's avatar Patrick Daly
Browse files

tty: serial: msm: Use recommended clock rate during hibernation 



Set the rate as recommended to avoid issues where the clock driver skips
reconfiguring the clock hardware during hibernation resume.

Change-Id: I64e0dc381b6ed4ea9b1f5b3eef917d0616bdcf44
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent d5546ff2

drivers/tty/serial/msm_serial.c

+26 −1
Original line number Diff line number Diff line
@@ -1858,10 +1858,35 @@ static int msm_serial_resume(struct device *dev) 


	return 0;

}



static int msm_serial_freeze(struct device *dev)

{

	struct uart_port *port = dev_get_drvdata(dev);

	struct msm_port *msm_port = UART_TO_MSM(port);

	int ret;



	ret = msm_serial_suspend(dev);

	if (ret)

		return ret;



	/*

	 * Set the rate as recommended to avoid issues where the clock

	 * driver skips reconfiguring the clock hardware during

	 * hibernation resume.

	 */

	return clk_set_rate(msm_port->clk, 19200000);

}

#endif



static const struct dev_pm_ops msm_serial_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(msm_serial_suspend, msm_serial_resume)

#ifdef CONFIG_PM_SLEEP

	.suspend = msm_serial_suspend,

	.resume = msm_serial_resume,

	.freeze = msm_serial_freeze,

	.thaw = msm_serial_resume,

	.poweroff = msm_serial_suspend,

	.restore = msm_serial_resume,

#endif

};



static struct platform_driver msm_platform_driver = {