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Commit f9c8d6dd authored by Subramanian Ananthanarayanan's avatar Subramanian Ananthanarayanan Committed by Gerrit - the friendly Code Review server
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pci:switch: Implement PM ops for QPS615 support 



Changes are to save and restore PCI switch config space as part
of system suspend/resume scenario.

Change-Id: I30a1024e1fb7f70e2274d6a6347fdce6e5b019cd
Signed-off-by: default avatarSubramanian Ananthanarayanan <skananth@codeaurora.org>
parent 64ddfd32

drivers/pci/switch/switch-qcom.c

+27 −0
Original line number Diff line number Diff line
@@ -15,6 +15,8 @@ 


#define DIODE_VENDOR_ID	0x12d8

#define DIODE_DEVICE_ID	0xb304

#define NTN3_VENDOR_ID	PCI_VENDOR_ID_TOSHIBA

#define NTN3_DEVICE_ID	0x0623



/*

 * @DIODE_ERRATA_0: Apply errata specific to the upstream port (USP).
@@ -256,6 +258,9 @@ static struct pci_device_id switch_qcom_pci_tbl[] = { 
	{

		PCI_DEVICE(DIODE_VENDOR_ID, DIODE_DEVICE_ID),

	},

	{

		PCI_DEVICE(NTN3_VENDOR_ID, NTN3_DEVICE_ID),

	},

	{0},

};

MODULE_DEVICE_TABLE(pci, switch_qcom_pci_tbl);
@@ -314,11 +319,33 @@ static int switch_qcom_pci_probe(struct pci_dev *pdev, 
	return 0;

}



static int switch_qcom_pci_suspend(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);



	pci_save_state(pdev);

	pci_set_power_state(pdev, PCI_D3hot);



	return 0;

}

static int switch_qcom_pci_resume(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);



	pci_set_power_state(pdev, PCI_D0);

	pci_restore_state(pdev);



	return 0;

}

const struct dev_pm_ops switch_qcom_pci_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(switch_qcom_pci_suspend, switch_qcom_pci_resume)

};

static struct pci_driver switch_qcom_pci_driver = {

	.name		= "pcie-qcom-switch",

	.id_table	= switch_qcom_pci_tbl,

	.probe		= switch_qcom_pci_probe,

	.remove		= switch_qcom_pci_remove,

	.driver.pm	= &switch_qcom_pci_pm_ops,

};



static int __init switch_qcom_pci_init(void)