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Commit a8a1781b authored by 남영민's avatar 남영민 Committed by Greg Kroah-Hartman
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serial: samsung: enable clock before accessing interrupt mask resister 



Ensure that the uart clock is enabled prior to writing to the
interrupt mask register in s3c24xx_serial_resume_noirq function.
Without enabing the uart clock, the uart register cannot be accessed.

Signed-off-by: default avatarYoungmin Nam <youngmin.nam@samsung.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5d1a2388

drivers/tty/serial/samsung.c

+3 −0
Original line number Diff line number Diff line
@@ -1916,6 +1916,7 @@ static int s3c24xx_serial_resume(struct device *dev) 
static int s3c24xx_serial_resume_noirq(struct device *dev)

{

	struct uart_port *port = s3c24xx_dev_to_port(dev);

	struct s3c24xx_uart_port *ourport = to_ourport(port);



	if (port) {

		/* restore IRQ mask */
@@ -1925,7 +1926,9 @@ static int s3c24xx_serial_resume_noirq(struct device *dev) 
				uintm &= ~S3C64XX_UINTM_TXD_MSK;

			if (rx_enabled(port))

				uintm &= ~S3C64XX_UINTM_RXD_MSK;

			clk_prepare_enable(ourport->clk);

			wr_regl(port, S3C64XX_UINTM, uintm);

			clk_disable_unprepare(ourport->clk);

		}

	}