Merge "msm: ipa: add support for AP suspend in rmnet_ipa"

	return 0;

}

/**

* rmnet_ipa_ap_suspend() - suspend callback for runtime_pm

* @dev: pointer to device

*

* This callback will be invoked by the runtime_pm framework when an AP suspend

* operation is invoked, usually by pressing a suspend button.

*

* Returns -EAGAIN to runtime_pm framework in case there are pending packets

* in the Tx queue. This will postpone the suspend operation until all the

* pending packets will be transmitted.

*

* In case there are no packets to send, releases the WWAN0_PROD entity.

* As an outcome, the number of IPA active clients should be decremented

* until IPA clocks can be gated.

*/

static int rmnet_ipa_ap_suspend(struct device *dev)

{

	struct net_device *netdev = ipa_netdevs[0];

	struct wwan_private *wwan_ptr = netdev_priv(netdev);

	IPAWANDBG("Enter...\n");

	/* Do not allow A7 to suspend in case there are oustanding packets */

	if (atomic_read(&wwan_ptr->outstanding_pkts) != 0) {

		IPAWANDBG("Outstanding packets, postponing AP suspend.\n");

		return -EAGAIN;

	}

	/* Make sure that there is no Tx operation ongoing */

	netif_tx_lock(netdev);

	ipa_rm_release_resource(IPA_RM_RESOURCE_WWAN_0_PROD);

	netif_tx_unlock(netdev);

	IPAWANDBG("Exit\n");

	return 0;

}

/**

* rmnet_ipa_ap_resume() - resume callback for runtime_pm

* @dev: pointer to device

*

* This callback will be invoked by the runtime_pm framework when an AP resume

* operation is invoked.

*

* Enables the network interface queue and returns success to the

* runtime_pm framwork.

*/

static int rmnet_ipa_ap_resume(struct device *dev)

{

	struct net_device *netdev = ipa_netdevs[0];

	IPAWANDBG("Enter...\n");

	netif_wake_queue(netdev);

	IPAWANDBG("Exit\n");

	return 0;

}

static const struct of_device_id rmnet_ipa_dt_match[] = {

	{.compatible = "qcom,rmnet-ipa"},

	{},

};

MODULE_DEVICE_TABLE(of, rmnet_ipa_dt_match);

static const struct dev_pm_ops rmnet_ipa_pm_ops = {

	.suspend_noirq = rmnet_ipa_ap_suspend,

	.resume_noirq = rmnet_ipa_ap_resume,

};

static struct platform_driver rmnet_ipa_driver = {

	.driver = {

		.name = "rmnet_ipa",

		.owner = THIS_MODULE,

		.pm = &rmnet_ipa_pm_ops,

		.of_match_table = rmnet_ipa_dt_match,

	},

	.probe = ipa_wwan_probe,