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Commit 88e5173f authored by Kristen Carlson Accardi's avatar Kristen Carlson Accardi Committed by Greg Kroah-Hartman
Browse files

hsu: add runtime pm support 



Doesn't appear to be much to do here, however having the suspend/resume
functions will allow the d3/d0 transitions to be sent by the pci core.

Signed-off-by: default avatarKristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 0b058353

drivers/tty/serial/mfd.c

+47 −0
Original line number Original line Diff line number Diff line
@@ -38,6 +38,7 @@ 
#include <linux/pci.h>

#include <linux/pci.h>

#include <linux/io.h>

#include <linux/io.h>

#include <linux/debugfs.h>

#include <linux/debugfs.h>

#include <linux/pm_runtime.h>





#define HSU_DMA_BUF_SIZE	2048

#define HSU_DMA_BUF_SIZE	2048
@@ -764,6 +765,8 @@ static int serial_hsu_startup(struct uart_port *port) 
		container_of(port, struct uart_hsu_port, port);

		container_of(port, struct uart_hsu_port, port);

	unsigned long flags;

	unsigned long flags;





	pm_runtime_get_sync(up->dev);



	/*

	/*

	 * Clear the FIFO buffers and disable them.

	 * Clear the FIFO buffers and disable them.

	 * (they will be reenabled in set_termios())

	 * (they will be reenabled in set_termios())
@@ -871,6 +874,8 @@ static void serial_hsu_shutdown(struct uart_port *port) 
				  UART_FCR_CLEAR_RCVR |

				  UART_FCR_CLEAR_RCVR |

				  UART_FCR_CLEAR_XMIT);

				  UART_FCR_CLEAR_XMIT);

	serial_out(up, UART_FCR, 0);

	serial_out(up, UART_FCR, 0);



	pm_runtime_put(up->dev);

}

}





static void

static void
@@ -1249,6 +1254,39 @@ static int serial_hsu_resume(struct pci_dev *pdev) 
#define serial_hsu_resume	NULL

#define serial_hsu_resume	NULL

#endif

#endif





#ifdef CONFIG_PM_RUNTIME

static int serial_hsu_runtime_idle(struct device *dev)

{

	int err;



	err = pm_schedule_suspend(dev, 500);

	if (err)

		return -EBUSY;



	return 0;

}



static int serial_hsu_runtime_suspend(struct device *dev)

{

	return 0;

}



static int serial_hsu_runtime_resume(struct device *dev)

{

	return 0;

}

#else

#define serial_hsu_runtime_idle		NULL

#define serial_hsu_runtime_suspend	NULL

#define serial_hsu_runtime_resume	NULL

#endif



static const struct dev_pm_ops serial_hsu_pm_ops = {

	.runtime_suspend = serial_hsu_runtime_suspend,

	.runtime_resume = serial_hsu_runtime_resume,

	.runtime_idle = serial_hsu_runtime_idle,

};



/* temp global pointer before we settle down on using one or four PCI dev */

/* temp global pointer before we settle down on using one or four PCI dev */

static struct hsu_port *phsu;

static struct hsu_port *phsu;
@@ -1315,6 +1353,9 @@ static int serial_hsu_probe(struct pci_dev *pdev, 
		pci_set_drvdata(pdev, uport);

		pci_set_drvdata(pdev, uport);

	}

	}





	pm_runtime_put_noidle(&pdev->dev);

	pm_runtime_allow(&pdev->dev);



	return 0;

	return 0;





err_disable:

err_disable:
@@ -1411,6 +1452,9 @@ static void serial_hsu_remove(struct pci_dev *pdev) 
	if (!priv)

	if (!priv)

		return;

		return;





	pm_runtime_forbid(&pdev->dev);

	pm_runtime_get_noresume(&pdev->dev);



	/* For port 0/1/2, priv is the address of uart_hsu_port */

	/* For port 0/1/2, priv is the address of uart_hsu_port */

	if (pdev->device != 0x081E) {

	if (pdev->device != 0x081E) {

		up = priv;

		up = priv;
@@ -1438,6 +1482,9 @@ static struct pci_driver hsu_pci_driver = { 
	.remove =	__devexit_p(serial_hsu_remove),

	.remove =	__devexit_p(serial_hsu_remove),

	.suspend =	serial_hsu_suspend,

	.suspend =	serial_hsu_suspend,

	.resume	=	serial_hsu_resume,

	.resume	=	serial_hsu_resume,

	.driver = {

		.pm = &serial_hsu_pm_ops,

	},

};

};





static int __init hsu_pci_init(void)

static int __init hsu_pci_init(void)