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Commit a90aeb62 authored by Pramod Gurav's avatar Pramod Gurav Committed by Manjunatha Madana
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tty: serial: msm: Add suspend resume support 



Add suspend/resume callback support to serial msm driver.

Change-Id: I661fca45d2d762a08e331f53d8b3cb7b99117448
Signed-off-by: default avatarPramod Gurav <gpramod@codeaurora.org>
Signed-off-by: default avatarRunmin Wang <runminw@codeaurora.org>
Signed-off-by: default avatarAvaneesh Kumar Dwivedi <akdwived@codeaurora.org>
parent 1193ebd5

drivers/tty/serial/msm_serial.c

+27 −13
Original line number Diff line number Diff line
@@ -1160,15 +1160,6 @@ static int msm_set_baud_rate(struct uart_port *port, unsigned int baud, 
	return baud;

}



static void msm_init_clock(struct uart_port *port)

{

	struct msm_port *msm_port = UART_TO_MSM(port);



	clk_prepare_enable(msm_port->clk);

	clk_prepare_enable(msm_port->pclk);

	msm_serial_set_mnd_regs(port);

}



static int msm_startup(struct uart_port *port)

{

	struct msm_port *msm_port = UART_TO_MSM(port);
@@ -1178,7 +1169,19 @@ static int msm_startup(struct uart_port *port) 
	snprintf(msm_port->name, sizeof(msm_port->name),

		 "msm_serial%d", port->line);



	msm_init_clock(port);

	/*

	 * UART clk must be kept enabled to

	 * avoid losing received character

	 */

	ret = clk_prepare_enable(msm_port->clk);

	if (ret)

		return ret;



	ret = clk_prepare_enable(msm_port->pclk);

	if (ret)

		goto err_pclk;



	msm_serial_set_mnd_regs(port);



	if (likely(port->fifosize > 12))

		rfr_level = port->fifosize - 12;
@@ -1217,6 +1220,8 @@ static int msm_startup(struct uart_port *port) 


	clk_disable_unprepare(msm_port->pclk);

	clk_disable_unprepare(msm_port->clk);

err_pclk:

	clk_disable_unprepare(msm_port->clk);



	return ret;

}
@@ -1231,6 +1236,7 @@ static void msm_shutdown(struct uart_port *port) 
	if (msm_port->is_uartdm)

		msm_release_dma(msm_port);



	clk_disable_unprepare(msm_port->pclk);

	clk_disable_unprepare(msm_port->clk);



	free_irq(port->irq, port);
@@ -1397,8 +1403,16 @@ static void msm_power(struct uart_port *port, unsigned int state, 


	switch (state) {

	case 0:

		clk_prepare_enable(msm_port->clk);

		clk_prepare_enable(msm_port->pclk);

		/*

		 * UART clk must be kept enabled to

		 * avoid losing received character

		 */

		if (clk_prepare_enable(msm_port->clk))

			return;

		if (clk_prepare_enable(msm_port->pclk)) {

			clk_disable_unprepare(msm_port->clk);

			return;

		}

		break;

	case 3:

		clk_disable_unprepare(msm_port->clk);
@@ -1670,7 +1684,7 @@ static int __init msm_console_setup(struct console *co, char *options) 
	if (unlikely(!port->membase))

		return -ENXIO;



	msm_init_clock(port);

	msm_serial_set_mnd_regs(port);



	if (options)

		uart_parse_options(options, &baud, &parity, &bits, &flow);